The waste incorporation into porcelain stoneware is a key strategy for enhancing sustainability in ceramic production. To achieve a satisfactory finished product, a crucial aspect to be investigated is the effect that a waste can induce on the tile sintering behaviour, which, in turn, determines its final technological properties. This study investigates the effect of a glass deriving from the thermal inertization of man‑made vitreous fibres on the sintering of porcelain stoneware tiles, obtained by pressing and fast firing. Results indicated that it is easier to incorporate into porcelain stoneware than other peralkaline glasses, due to its tendency to crystallize in the early stage of the densification process, limiting the interaction with the ceramic matrix and allowing the achievement of a good densification. Otherwise, the microstructure of the fired tiles in overfiring conditions is influenced, since the loss of bulk viscosity and likely the Fe3 + reduction led to bloating phenomena.
{"title":"Sintering mechanisms, phase transformations and microstructure of porcelain stoneware containing thermally inertized man-made vitreous fibres","authors":"Sonia Conte , Riccardo Fantini , Rossella Arletti , Chiara Molinari , Michele Dondi , Chiara Zanelli , Alessandro F. Gualtieri","doi":"10.1016/j.jeurceramsoc.2025.117230","DOIUrl":"10.1016/j.jeurceramsoc.2025.117230","url":null,"abstract":"<div><div>The waste incorporation into porcelain stoneware is a key strategy for enhancing sustainability in ceramic production. To achieve a satisfactory finished product, a crucial aspect to be investigated is the effect that a waste can induce on the tile sintering behaviour, which, in turn, determines its final technological properties. This study investigates the effect of a glass deriving from the thermal inertization of man‑made vitreous fibres on the sintering of porcelain stoneware tiles, obtained by pressing and fast firing. Results indicated that it is easier to incorporate into porcelain stoneware than other peralkaline glasses, due to its tendency to crystallize in the early stage of the densification process, limiting the interaction with the ceramic matrix and allowing the achievement of a good densification. Otherwise, the microstructure of the fired tiles in overfiring conditions is influenced, since the loss of bulk viscosity and likely the Fe<sup>3 +</sup> reduction led to bloating phenomena.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117230"},"PeriodicalIF":5.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-21DOI: 10.1016/j.jeurceramsoc.2025.117233
Shiliang Luan, Ke Ren, Yiguang Wang
A single-phase Yb2Si2O7 coating was deposited on SiCf/SiC composites with a silicon bond coat using air plasma spraying. The hot corrosion behavior of Yb2Si2O7-coated SiCf/SiC was investigated in a coupling environment consisting of water vapor and calcium–magnesium–aluminum–silicate (CMAS) with static oxidation at 1350 °C. The evolution of the phase and cross-sectional morphology of the samples was characterized using X-ray diffraction and scanning electron microscopy. The results indicate that thermal stress generated by the growth of the thermally grown oxide (TGO) layer leads to the fractures at the TGO–Yb2Si2O7 interface in samples loaded with low CMAS concentration. In samples with high CMAS concentration, excess CMAS reacts with the TGO layer, destroying its structure and accelerating the oxidation of the Si bond coat. Cracks bifurcate within the TGO layer, extend along the TGO interface, and ultimately penetrate the interior of the TGO layer. The concentration of CMAS influences the crack propagation mode within the TGO layer and alters the failure behavior of the coating.
{"title":"Effect of CMAS concentration on the failure mode of Yb2Si2O7-based environmental barrier coatings in water vapor environments","authors":"Shiliang Luan, Ke Ren, Yiguang Wang","doi":"10.1016/j.jeurceramsoc.2025.117233","DOIUrl":"10.1016/j.jeurceramsoc.2025.117233","url":null,"abstract":"<div><div>A single-phase Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> coating was deposited on SiC<sub>f</sub>/SiC composites with a silicon bond coat using air plasma spraying. The hot corrosion behavior of Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-coated SiC<sub>f</sub>/SiC was investigated in a coupling environment consisting of water vapor and calcium–magnesium–aluminum–silicate (CMAS) with static oxidation at 1350 °C. The evolution of the phase and cross-sectional morphology of the samples was characterized using X-ray diffraction and scanning electron microscopy. The results indicate that thermal stress generated by the growth of the thermally grown oxide (TGO) layer leads to the fractures at the TGO–Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> interface in samples loaded with low CMAS concentration. In samples with high CMAS concentration, excess CMAS reacts with the TGO layer, destroying its structure and accelerating the oxidation of the Si bond coat. Cracks bifurcate within the TGO layer, extend along the TGO interface, and ultimately penetrate the interior of the TGO layer. The concentration of CMAS influences the crack propagation mode within the TGO layer and alters the failure behavior of the coating.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117233"},"PeriodicalIF":5.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-21DOI: 10.1016/j.jeurceramsoc.2025.117231
Carla Malinverni , Valentina Casalegno , Pierre Bertrand , Georg Puchas , Stefan Schafföner , Milena Salvo
In this work, a Ti-based high-entropy alloy was used to join Al2O3f / Al2O3-ZrO2 ceramic matrix composites, intended for use as radiant tube furnace components in energy-intensive industries such as steelmaking. The brazing cycle was conducted in a vacuum tubular furnace up to 1050 °C. The brazing material consisted of brazing alloy powders mixed with a water-based binder. Process parameters studied included the weight percentages of the binder, the pressure applied on the joints, and additional heat treatments to obtain successful brazed CMCs. Morphological characterizations were conducted to analyze the brazed joints and the microstructure of the filler metal. Mechanical shear tests at room temperature were performed to assess the apparent shear strength of the brazed joints, measuring 49 ± 8 MPa of apparent shear strength for butt-configuration joints with failure mode caused by the delamination of the composite. Additionally, direct-flame exposure tests were conducted to evaluate the brazed joints in combustion environments.
{"title":"Titanium-based brazing alloy for bonding oxide/oxide CMCs for steelmaking industry applications","authors":"Carla Malinverni , Valentina Casalegno , Pierre Bertrand , Georg Puchas , Stefan Schafföner , Milena Salvo","doi":"10.1016/j.jeurceramsoc.2025.117231","DOIUrl":"10.1016/j.jeurceramsoc.2025.117231","url":null,"abstract":"<div><div>In this work, a Ti-based high-entropy alloy was used to join Al<sub>2</sub>O<sub>3<em>f</em></sub> / Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> ceramic matrix composites, intended for use as radiant tube furnace components in energy-intensive industries such as steelmaking. The brazing cycle was conducted in a vacuum tubular furnace up to 1050 °C. The brazing material consisted of brazing alloy powders mixed with a water-based binder. Process parameters studied included the weight percentages of the binder, the pressure applied on the joints, and additional heat treatments to obtain successful brazed CMCs. Morphological characterizations were conducted to analyze the brazed joints and the microstructure of the filler metal. Mechanical shear tests at room temperature were performed to assess the apparent shear strength of the brazed joints, measuring 49 ± 8 MPa of apparent shear strength for butt-configuration joints with failure mode caused by the delamination of the composite. Additionally, direct-flame exposure tests were conducted to evaluate the brazed joints in combustion environments.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117231"},"PeriodicalIF":5.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-21DOI: 10.1016/j.jeurceramsoc.2025.117229
Maëlys Gauthé , Christophe Lorrette , Laurent Chaffron , Sarah Calmé , Xavier Tonnellier , Jacques Rodolfo , Yvan Sortais
Fused Filament Fabrication (FFF) is a constant evolving additive manufacturing (AM) technology enabling the production of near-net-shape parts with complex geometries without requiring molds. While extensively applied to oxide ceramics such as alumina and zirconia, its application to non-oxide ceramics like silicon carbide (SiC) remains underexplored. Key challenges include defects arising from sintering operations and inherent porosity introduced by the 3D printing process. This original study examines the best strategy to produce fully dense and defect-free SiC through FFF method combined with pressureless sintering. Process parameters were systematically refined using Taguchi’s method. Defects like delaminations and voids were characterized and correlated with filament ageing. By employing optimized parameters, printed parts exhibited fine, homogeneous microstructures along with mechanical performances comparable to commercial SiC grades. The resulting properties include a density of 3.14 g.cm-³ , a hardness of 2492 HV, a Young’s modulus of 410 GPa, and an average flexural strength of 429 MPa with a Weibull’s modulus of 9.0. Furthermore, this contribution highlights the significant influence of filament ageing on mechanical performance, providing valuable insights for the development of reliable SiC components via FFF.
{"title":"Fused Filament Fabrication of silicon carbide parts: A strategy for producing high-strength components","authors":"Maëlys Gauthé , Christophe Lorrette , Laurent Chaffron , Sarah Calmé , Xavier Tonnellier , Jacques Rodolfo , Yvan Sortais","doi":"10.1016/j.jeurceramsoc.2025.117229","DOIUrl":"10.1016/j.jeurceramsoc.2025.117229","url":null,"abstract":"<div><div>Fused Filament Fabrication (FFF) is a constant evolving additive manufacturing (AM) technology enabling the production of near-net-shape parts with complex geometries without requiring molds. While extensively applied to oxide ceramics such as alumina and zirconia, its application to non-oxide ceramics like silicon carbide (SiC) remains underexplored. Key challenges include defects arising from sintering operations and inherent porosity introduced by the 3D printing process. This original study examines the best strategy to produce fully dense and defect-free SiC through FFF method combined with pressureless sintering. Process parameters were systematically refined using Taguchi’s method. Defects like delaminations and voids were characterized and correlated with filament ageing. By employing optimized parameters, printed parts exhibited fine, homogeneous microstructures along with mechanical performances comparable to commercial SiC grades. The resulting properties include a density of 3.14 g.cm<sup>-</sup>³ , a hardness of 2492 HV, a Young’s modulus of 410 GPa, and an average flexural strength of 429 MPa with a Weibull’s modulus of 9.0. Furthermore, this contribution highlights the significant influence of filament ageing on mechanical performance, providing valuable insights for the development of reliable SiC components via FFF.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117229"},"PeriodicalIF":5.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-20DOI: 10.1016/j.jeurceramsoc.2025.117224
Oussama Zwein , Maurice Gonon , Sandra Abdelouhab , Isabella Mastroianni , Marc Duquennoy
The aim of the work presented in this paper is to investigate the thermoelastic properties of polycrystalline Sr-fresnoite Sr2TiSi2O8 (STS). On that purpose, Sr2TiSi2O8 samples were synthesized by solid state reactive sintering from SrCO3, TiO2 and SiO2 powders. The thermal expansion behaviour of the so-obtained material was characterized at the microscale by using High Temperature X-Ray Diffraction (HT – XRD) to follow the changes in the unit cell parameters of STS. The results were correlated to the macroscopic expansion behaviour characterized by dilatometry, and to the evolution of the Young’s modulus with temperature measured by the impulse excitation technique (IET). It is evidenced that STS presents a commensurate-to-incommensurate phase transformation characterized by thermal hysteresis and leading to a minimum peak in CTE at 200 °C during the heating and at 150 °C during the cooling. From 300 °C to 900 °C, the thermal expansion exhibits an almost linear behaviour with an average CTE of . Between 900°C and 1000 °C, a maximum peak in CTE, also characterized by thermal hysteresis, is observed and seems to be attributed to a reverse transformation to a commensurate phase. The value of Young’s modulus E is 105 ± 0.5 GPa at room temperature. The commensurate-to-incommensurate phase transformation also affects the Young’s modulus by inducing a weak minimum peak at the same temperatures as those observed for the CTE. At higher temperature, the Young’s modulus remains stable up to 500 °C and slowly decreases over this temperature. It remains equal to 96 ± 0.5 GPa at 950 °C.
{"title":"Thermoelastic properties of polycrystalline strontium titanium silicate Sr₂TiSi₂O₈ synthesized via the reactive sintering method","authors":"Oussama Zwein , Maurice Gonon , Sandra Abdelouhab , Isabella Mastroianni , Marc Duquennoy","doi":"10.1016/j.jeurceramsoc.2025.117224","DOIUrl":"10.1016/j.jeurceramsoc.2025.117224","url":null,"abstract":"<div><div>The aim of the work presented in this paper is to investigate the thermoelastic properties of polycrystalline Sr-fresnoite Sr<sub>2</sub>TiSi<sub>2</sub>O<sub>8</sub> (STS). On that purpose, Sr<sub>2</sub>TiSi<sub>2</sub>O<sub>8</sub> samples were synthesized by solid state reactive sintering from SrCO<sub>3</sub>, TiO<sub>2</sub> and SiO<sub>2</sub> powders. The thermal expansion behaviour of the so-obtained material was characterized at the microscale by using High Temperature X-Ray Diffraction (HT – XRD) to follow the changes in the unit cell parameters of STS. The results were correlated to the macroscopic expansion behaviour characterized by dilatometry, and to the evolution of the Young’s modulus with temperature measured by the impulse excitation technique (IET). It is evidenced that STS presents a commensurate-to-incommensurate phase transformation characterized by thermal hysteresis and leading to a minimum peak in CTE at 200 °C during the heating and at 150 °C during the cooling. From 300 °C to 900 °C, the thermal expansion exhibits an almost linear behaviour with an average CTE of <span><math><mrow><mn>12</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>6</mn></mrow></msup><mspace></mspace><msup><mrow><mi>K</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>. Between 900°C and 1000 °C, a maximum peak in CTE, also characterized by thermal hysteresis, is observed and seems to be attributed to a reverse transformation to a commensurate phase. The value of Young’s modulus E is 105 ± 0.5 GPa at room temperature. The commensurate-to-incommensurate phase transformation also affects the Young’s modulus by inducing a weak minimum peak at the same temperatures as those observed for the CTE. At higher temperature, the Young’s modulus remains stable up to 500 °C and slowly decreases over this temperature. It remains equal to 96 ± 0.5 GPa at 950 °C.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117224"},"PeriodicalIF":5.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-20DOI: 10.1016/j.jeurceramsoc.2025.117227
Huong Thi Nguyen , Yen-Ling Kuo , Makoto Nanko
Influence of oxygen partial pressure () on the self-healing and high-temperature oxidation was investigated on Y2Si2O7-Y2SiO5-based composites dispersed with SiC particles. Almost fully densified samples were fabricated by using the pulsed electric current sintering technique. Self-healing performance and oxidation resistance was assessed after annealing samples at 1100–1400°C for 1–24 h under from 1 to 5 × 104 Pa. Surface cracks were completely healed at 1300°C for 1 h under all tested conditions. Higher contributed to increased self-healing ability. In this series, the primary mechanism for surface crack recovery is SiC volume expansion, with the outward diffusion of Y3+ ions playing a supportive, secondary role. The inward diffusion of O2- anions resulted in the formation of an internally oxidized zone (IOZ), following parabolic growth. Higher results in a thicker IOZ. A kinetic model for high temperature oxidation was developed from diffusion mechanism and defect chemistry viewpoint.
{"title":"Kinetics of self-healing and thermal oxidation of SiC-dispersed yttrium silicate composites under different oxygen partial pressure in steam-containing atmosphere","authors":"Huong Thi Nguyen , Yen-Ling Kuo , Makoto Nanko","doi":"10.1016/j.jeurceramsoc.2025.117227","DOIUrl":"10.1016/j.jeurceramsoc.2025.117227","url":null,"abstract":"<div><div>Influence of oxygen partial pressure (<span><math><msub><mrow><mi>P</mi></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub></math></span>) on the self-healing and high-temperature oxidation was investigated on Y<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-Y<sub>2</sub>SiO<sub>5</sub>-based composites dispersed with SiC particles. Almost fully densified samples were fabricated by using the pulsed electric current sintering technique. Self-healing performance and oxidation resistance was assessed after annealing samples at 1100–1400°C for 1–24 h under <span><math><msub><mrow><mi>P</mi></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub></math></span> from 1 to 5 × 10<sup>4</sup> Pa. Surface cracks were completely healed at 1300°C for 1 h under all <span><math><msub><mrow><mi>P</mi></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub></math></span> tested conditions. Higher <span><math><msub><mrow><mi>P</mi></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub></math></span> contributed to increased self-healing ability. In this series, the primary mechanism for surface crack recovery is SiC volume expansion, with the outward diffusion of Y<sup>3+</sup> ions playing a supportive, secondary role. The inward diffusion of O<sup>2-</sup> anions resulted in the formation of an internally oxidized zone (IOZ), following parabolic growth. Higher <span><math><msub><mrow><mi>P</mi></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub></math></span> results in a thicker IOZ. A kinetic model for high temperature oxidation was developed from diffusion mechanism and defect chemistry viewpoint.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117227"},"PeriodicalIF":5.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-20DOI: 10.1016/j.jeurceramsoc.2025.117226
Daming Sun , Qi Zhang , Tao Du , Randall E. Youngman , Lars R. Jensen , Deyong Wang , Feng Yang , Rebekka Klemmt , Morten M. Smedskjaer
Crack initiation and growth limit the mechanical reliability and industrial applications of oxide glasses. The conversion of glasses into glass-ceramics can help to compensate for this shortcoming, as the presence of crystals can cause crack deflection and crack bridging and then increase the fracture toughness. However, due to the different thermal expansion of crystal and glass phases, the generation of residual stress is inevitable, which will induce compressive or tensile stress in glass-ceramics, thus changing the crack propagation path and crack initiation resistance. As such, it is a challenge to simultaneously improve the fracture toughness and crack initiation resistance. In this work, we attempt to address this challenge by modifying the crystal content in Nb2O5-doped magnesium aluminoborate glass-ceramics to improve crack resistance. Due to the generation of Al4B2O9 crystals with a lower coefficient of thermal expansion compared to the glass matrix, compressive stress is generated on the surface of the glass-ceramics, which reduces the cracking probability. At the same time, the presence of crystals causes crack deflection and crack bridging phenomena, enhancing the fracture toughness. In addition, heat-treatment also leads to an increase in the network connectivity of the glass ceramics, contributing to the improvement of its overall mechanical properties.
{"title":"Damage resistant and tolerant glass-ceramics with low-thermal expansion crystals","authors":"Daming Sun , Qi Zhang , Tao Du , Randall E. Youngman , Lars R. Jensen , Deyong Wang , Feng Yang , Rebekka Klemmt , Morten M. Smedskjaer","doi":"10.1016/j.jeurceramsoc.2025.117226","DOIUrl":"10.1016/j.jeurceramsoc.2025.117226","url":null,"abstract":"<div><div>Crack initiation and growth limit the mechanical reliability and industrial applications of oxide glasses. The conversion of glasses into glass-ceramics can help to compensate for this shortcoming, as the presence of crystals can cause crack deflection and crack bridging and then increase the fracture toughness. However, due to the different thermal expansion of crystal and glass phases, the generation of residual stress is inevitable, which will induce compressive or tensile stress in glass-ceramics, thus changing the crack propagation path and crack initiation resistance. As such, it is a challenge to simultaneously improve the fracture toughness and crack initiation resistance. In this work, we attempt to address this challenge by modifying the crystal content in Nb<sub>2</sub>O<sub>5</sub>-doped magnesium aluminoborate glass-ceramics to improve crack resistance. Due to the generation of Al<sub>4</sub>B<sub>2</sub>O<sub>9</sub> crystals with a lower coefficient of thermal expansion compared to the glass matrix, compressive stress is generated on the surface of the glass-ceramics, which reduces the cracking probability. At the same time, the presence of crystals causes crack deflection and crack bridging phenomena, enhancing the fracture toughness. In addition, heat-treatment also leads to an increase in the network connectivity of the glass ceramics, contributing to the improvement of its overall mechanical properties.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117226"},"PeriodicalIF":5.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aluminum nitride ceramics are widely used in electronic devices, but their applications are hindered by relatively low mechanical strength. A multicomponent sintering additive approach was employed to address it. Yttrium hexahydrate nitrate, samarium hexahydrate nitrate, and scandium monohydrate nitrate were incorporated to develop AlN ceramics with mechanical properties via vat photopolymerization comparable to those of Si3N4 ceramics. The influence of different nitrate contents on the viscosity and curing behavior of AlN suspensions was investigated. The results show that curing performance of AlN suspensions used for printing was optimized. Furthermore, dense AlN ceramics were fabricated through pressureless sintering at 1800 °C for 4 hours. The samples incorporating ternary sintering additives exhibited the highest comprehensive performance with a flexural strength and thermal conductivity of 616.6 MPa and 74.09 W/(m·k). This represents a significant advancement in the development of digital light processing-printed AlN ceramics with mechanical performance levels approaching those of Si3N4 ceramics.
{"title":"Vat photopolymerization of high-strength aluminum nitride ceramics through nitrate additives coating","authors":"Yujie Qi , Haidong Wu , Wenduo Zhang, Pengjin Huang, Xuanzhi Chen, Kunji Lin, Shanghua Wu","doi":"10.1016/j.jeurceramsoc.2025.117228","DOIUrl":"10.1016/j.jeurceramsoc.2025.117228","url":null,"abstract":"<div><div>Aluminum nitride ceramics are widely used in electronic devices, but their applications are hindered by relatively low mechanical strength. A multicomponent sintering additive approach was employed to address it. Yttrium hexahydrate nitrate, samarium hexahydrate nitrate, and scandium monohydrate nitrate were incorporated to develop AlN ceramics with mechanical properties via vat photopolymerization comparable to those of Si<sub>3</sub>N<sub>4</sub> ceramics. The influence of different nitrate contents on the viscosity and curing behavior of AlN suspensions was investigated. The results show that curing performance of AlN suspensions used for printing was optimized. Furthermore, dense AlN ceramics were fabricated through pressureless sintering at 1800 °C for 4 hours. The samples incorporating ternary sintering additives exhibited the highest comprehensive performance with a flexural strength and thermal conductivity of 616.6 MPa and 74.09 W/(m·k). This represents a significant advancement in the development of digital light processing-printed AlN ceramics with mechanical performance levels approaching those of Si<sub>3</sub>N<sub>4</sub> ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117228"},"PeriodicalIF":5.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-19DOI: 10.1016/j.jeurceramsoc.2025.117225
Shengcai Wu , Pengwei Li , Xiaotong Zhang , Rongjie Wang , Xin Jia , Yuxiong Guo , Xiaolong Wang
3D-printed catalysts offer several advantages, including high efficiency, energy savings, and design flexibility. However, the one-pot preparation of 3D-printed catalysts with favourable catalytic performance and uniform distribution of catalytically active components remains a significant challenge. This study explores the preparation of Co-loaded silica ceramic-based catalysts via a one-pot method using direct ink writing (DIW). Silica ceramic-based catalysts with varying grid sizes and Co loadings (1–3 wt%) were fabricated using aluminium dihydrogen phosphate (AP) as an inorganic binder and hydroxypropyl methylcellulose (HPMC) as an organic binder. Co was uniformly distributed without aggregation, and the loading was easily customisable. The catalytic conversion rate of p-nitrophenol (4-NP) reached 100 % and remained at 95.4 % after eight cycles. Furthermore, the compressive stresses of AP-C and HPMC-C reached 93.7 and 11.3 MPa, respectively. This one-pot method provides a novel, facile, and efficient approach for fabricating 3D-printed silica ceramic-based catalysts in one step.
{"title":"One-pot preparation of 3D-printed Co-loaded silica ceramic catalysts","authors":"Shengcai Wu , Pengwei Li , Xiaotong Zhang , Rongjie Wang , Xin Jia , Yuxiong Guo , Xiaolong Wang","doi":"10.1016/j.jeurceramsoc.2025.117225","DOIUrl":"10.1016/j.jeurceramsoc.2025.117225","url":null,"abstract":"<div><div>3D-printed catalysts offer several advantages, including high efficiency, energy savings, and design flexibility. However, the one-pot preparation of 3D-printed catalysts with favourable catalytic performance and uniform distribution of catalytically active components remains a significant challenge. This study explores the preparation of Co-loaded silica ceramic-based catalysts via a one-pot method using direct ink writing (DIW). Silica ceramic-based catalysts with varying grid sizes and Co loadings (1–3 wt%) were fabricated using aluminium dihydrogen phosphate (AP) as an inorganic binder and hydroxypropyl methylcellulose (HPMC) as an organic binder. Co was uniformly distributed without aggregation, and the loading was easily customisable. The catalytic conversion rate of p-nitrophenol (4-NP) reached 100 % and remained at 95.4 % after eight cycles. Furthermore, the compressive stresses of AP-C and HPMC-C reached 93.7 and 11.3 MPa, respectively. This one-pot method provides a novel, facile, and efficient approach for fabricating 3D-printed silica ceramic-based catalysts in one step.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117225"},"PeriodicalIF":5.8,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-16DOI: 10.1016/j.jeurceramsoc.2025.117219
Han-li Lian , Meng Shi , Sha Lv , Li-na Liu , Xiao-ming Chen
The lead-free ceramics (1-x)[0.97(0.94Bi0.47Na0.47Ba0.06TiO3-0.06BiAlO3)-0.03AgNbO3]-xSr0.7La0.2Zr0.15Ti0.85O3 (denoted as BNBTA-xSLZT, x = 0, 0.3) with dense microstructures were prepared via a solid-state sintering method. Effect of addition of Sr0.7La0.2Zr0.15Ti0.85O3 on microstructure, dielectric, ferroelectric, and energy storage properties of the ceramics was investigated thoroughly. Compared to the ceramic with x = 0, the ceramic BNBTA-0.3SLZT demonstrates small grains with average grain size of 0.57 μm and high breakdown strength of 345 kV/cm. BNBTA-0.3SLZT also exhibits excellent dielectric temperature stability with temperature coefficient of capacitance TCC ≤ 15 % between −8 °C and 256 °C. Remarkably, a recoverable energy density of 5.60 J/cm³ and an efficiency of 86.6 % were attained for BNBTA-0.3SLZT coupled with outstanding cycle stability and frequency stability, which can be used as one candidate for capacitor energy storage materials.
{"title":"Dielectric, ferroelectric, and energy storage properties of BNBTA-xSLZT lead-free ceramics","authors":"Han-li Lian , Meng Shi , Sha Lv , Li-na Liu , Xiao-ming Chen","doi":"10.1016/j.jeurceramsoc.2025.117219","DOIUrl":"10.1016/j.jeurceramsoc.2025.117219","url":null,"abstract":"<div><div>The lead-free ceramics (1-x)[0.97(0.94Bi<sub>0.47</sub>Na<sub>0.47</sub>Ba<sub>0.06</sub>TiO<sub>3</sub>-0.06BiAlO<sub>3</sub>)-0.03AgNbO<sub>3</sub>]-xSr<sub>0.7</sub>La<sub>0.2</sub>Zr<sub>0.15</sub>Ti<sub>0.85</sub>O<sub>3</sub> (denoted as BNBTA-xSLZT, x = 0, 0.3) with dense microstructures were prepared via a solid-state sintering method. Effect of addition of Sr<sub>0.7</sub>La<sub>0.2</sub>Zr<sub>0.15</sub>Ti<sub>0.85</sub>O<sub>3</sub> on microstructure, dielectric, ferroelectric, and energy storage properties of the ceramics was investigated thoroughly. Compared to the ceramic with x = 0, the ceramic BNBTA-0.3SLZT demonstrates small grains with average grain size of 0.57 μm and high breakdown strength of 345 kV/cm. BNBTA-0.3SLZT also exhibits excellent dielectric temperature stability with temperature coefficient of capacitance TCC ≤ 15 % between −8 °C and 256 °C. Remarkably, a recoverable energy density of 5.60 J/cm³ and an efficiency of 86.6 % were attained for BNBTA-0.3SLZT coupled with outstanding cycle stability and frequency stability, which can be used as one candidate for capacitor energy storage materials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117219"},"PeriodicalIF":5.8,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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