Journal of The European Ceramic Society最新文献

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Applying archaeomagnetic methods to virtually reconstruct the kiln-loading patterns and manufacturing location: Insights from Tiebas Castle (Spain)

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-03-03 DOI: 10.1016/j.jeurceramsoc.2025.117343

Iván Ruiz-Ardanaz , Esther Lasheras , Adrián Durán

Archaeomagnetism is frequently used for dating baked-clay materials. When the original position of the material is preserved and if the secular variation of the geomagnetic field is well-known in this region, it is possible to date the moment when the baked structure acquired its thermoremanent magnetization (TRM). In this article, the inverse process was applied on a tile production from Tiebas castle (Spain): from the known chronology and direction of the thermoremanent magnetization, the original orientation was virtually reconstructed. The main objective of this innovative application was to determine the exact orientation of each tile in the firing kiln and to infer how tile kilns were loaded during the Middle Ages. The results confirmed that all tiles were placed vertically on one side. These positions were repeated across all rows and tiers. Additionally, this novel approach clarified that the tiles, although crafted by French artisans, were produced locally in Navarra rather than in Champagne. This novel application demonstrates the potential of archaeomagnetism for broader use in reconstructing historical ceramic structures and their contexts.

{"title":"Applying archaeomagnetic methods to virtually reconstruct the kiln-loading patterns and manufacturing location: Insights from Tiebas Castle (Spain)","authors":"Iván Ruiz-Ardanaz , Esther Lasheras , Adrián Durán","doi":"10.1016/j.jeurceramsoc.2025.117343","DOIUrl":"10.1016/j.jeurceramsoc.2025.117343","url":null,"abstract":"<div><div>Archaeomagnetism is frequently used for dating baked-clay materials. When the original position of the material is preserved and if the secular variation of the geomagnetic field is well-known in this region, it is possible to date the moment when the baked structure acquired its thermoremanent magnetization (TRM). In this article, the inverse process was applied on a tile production from Tiebas castle (Spain): from the known chronology and direction of the thermoremanent magnetization, the original orientation was virtually reconstructed. The main objective of this innovative application was to determine the exact orientation of each tile in the firing kiln and to infer how tile kilns were loaded during the Middle Ages. The results confirmed that all tiles were placed vertically on one side. These positions were repeated across all rows and tiers. Additionally, this novel approach clarified that the tiles, although crafted by French artisans, were produced locally in Navarra rather than in Champagne. This novel application demonstrates the potential of archaeomagnetism for broader use in reconstructing historical ceramic structures and their contexts.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117343"},"PeriodicalIF":5.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562680","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}

引用次数: 0

Multiphysics model of thermomechanical oxidative degradation in SiC/SiC ceramic matrix composite microstructures

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-03-01 DOI: 10.1016/j.jeurceramsoc.2025.117335

Mohamed H. Hamza, Jacob J. Schichtel, Aditi Chattopadhyay

A coupled thermomechanical-oxidation damage formulation, based on governing multiphysics constitutive relations and stochastic microstructure representation, is developed to provide fundamental insights into the life-limiting oxidative degradation mechanisms in ceramic matrix composites (CMCs) with a silicon carbide (SiC)-based matrix reinforced by SiC fibers. The methodology includes passive oxidation of the fibers governed by reaction kinetics and diffusion-limited degradation. Conservation of mass equations, incorporating a modified Fick’s law, govern the evolution of oxygen and silica concentrations in CMC constituents. The effective oxygen diffusivities in the matrix and fibers are modeled as functions of matrix damage and normalized silica concentration, respectively. The model is numerically implemented using the finite element method and tested on stochastic representative volume elements, accounting for the inherent flaws in the CMC microstructure. The fundamental differences between oxidation regimes, the time-dependent deformation mechanisms, and the influence of matrix damage on oxidation kinetics at the microscale are analyzed.

{"title":"Multiphysics model of thermomechanical oxidative degradation in SiC/SiC ceramic matrix composite microstructures","authors":"Mohamed H. Hamza, Jacob J. Schichtel, Aditi Chattopadhyay","doi":"10.1016/j.jeurceramsoc.2025.117335","DOIUrl":"10.1016/j.jeurceramsoc.2025.117335","url":null,"abstract":"<div><div>A coupled thermomechanical-oxidation damage formulation, based on governing multiphysics constitutive relations and stochastic microstructure representation, is developed to provide fundamental insights into the life-limiting oxidative degradation mechanisms in ceramic matrix composites (CMCs) with a silicon carbide (SiC)-based matrix reinforced by SiC fibers. The methodology includes passive oxidation of the fibers governed by reaction kinetics and diffusion-limited degradation. Conservation of mass equations, incorporating a modified Fick’s law, govern the evolution of oxygen and silica concentrations in CMC constituents. The effective oxygen diffusivities in the matrix and fibers are modeled as functions of matrix damage and normalized silica concentration, respectively. The model is numerically implemented using the finite element method and tested on stochastic representative volume elements, accounting for the inherent flaws in the CMC microstructure. The fundamental differences between oxidation regimes, the time-dependent deformation mechanisms, and the influence of matrix damage on oxidation kinetics at the microscale are analyzed.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117335"},"PeriodicalIF":5.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562594","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}

引用次数: 0

A continuum approach to simulating the sintering of 3D-printed objects with natural anisotropic honeycomb lattice structures

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-28 DOI: 10.1016/j.jeurceramsoc.2025.117334

Charles Manière , Theotim Marie , Aymeric Jugan , Loïc Le Pluart , Sylvain Marinel

Honeycomb lattice structures are commonly used to optimize the weight-to-strength ratio in 3D printing, but during high-temperature sintering, these parts are prone to distortions that current tools struggle to predict. To address this, we developed a comprehensive lattice/shell sintering model. Our approach calculates the effective sintering moduli of the honeycomb using virtual shear and isostatic tests, accounting for both material and structural anisotropy. A key challenge was ensuring synchronized sintering behavior between the thick shell and lattice, preventing distortion errors. This continuum simulation method, validated through bar sintering tests, significantly reduces computational demands, making it ideal for design and optimization studies.

引用次数: 0

Al2O3-TbYAG:Ce composite ceramic phosphors with balanced color rendering and lumen efficiency for high-brightness solid-state lighting

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-28 DOI: 10.1016/j.jeurceramsoc.2025.117333

Ziqiu Cheng , Zhenzhen Zhou , Chen Hu , Yanbin Wang , Dong Huang , Junhao Ye , Jiang Li

Al₂O₃-YAG:Ce composite ceramic phosphors (CCPs) have attracted extensive attention for applications in solid-state lighting for excellent thermal performance, high light saturation thresholds, and high lumen efficiency, but the color rendering properties need to be further improved. In this work, a series of Al₂O₃-TbYAG:Ce CCPs with various Tb^3 + contents were prepared by solid-state reaction sintering. Energy transfer from Tb³⁺ to Ce³⁺ confirmed in Al₂O₃-TbYAG:Ce ceramic system. As the Tb³⁺ content increases, the color rendering index (CRI) increases and the correlated color temperature (CCT) decreases due to the effective supplementation of the red-light component. Al₂O₃-Tb_0.3Y_0.7AG:Ce CCPs possess small thermal quenching (24.7 % loss in luminescence at 225°C) and achieve an optimized CRI of up to 81.6 under LED excitation. Furthermore, these ceramic samples exhibit high lumen efficiency of 200–246 lm·W⁻¹ and suitable CCT of 4949–5117 K under 18 W·mm⁻² power density, which is of great significance for realizing high-brightness LED/LD lighting.

{"title":"Al2O3-TbYAG:Ce composite ceramic phosphors with balanced color rendering and lumen efficiency for high-brightness solid-state lighting","authors":"Ziqiu Cheng , Zhenzhen Zhou , Chen Hu , Yanbin Wang , Dong Huang , Junhao Ye , Jiang Li","doi":"10.1016/j.jeurceramsoc.2025.117333","DOIUrl":"10.1016/j.jeurceramsoc.2025.117333","url":null,"abstract":"<div><div>Al<sub>2</sub>O<sub>3</sub>-YAG:Ce composite ceramic phosphors (CCPs) have attracted extensive attention for applications in solid-state lighting for excellent thermal performance, high light saturation thresholds, and high lumen efficiency, but the color rendering properties need to be further improved. In this work, a series of Al<sub>2</sub>O<sub>3</sub>-TbYAG:Ce CCPs with various Tb<sup>3 +</sup> contents were prepared by solid-state reaction sintering. Energy transfer from Tb<sup>3+</sup> to Ce<sup>3+</sup> confirmed in Al<sub>2</sub>O<sub>3</sub>-TbYAG:Ce ceramic system. As the Tb<sup>3+</sup> content increases, the color rendering index (CRI) increases and the correlated color temperature (CCT) decreases due to the effective supplementation of the red-light component. Al<sub>2</sub>O<sub>3</sub>-Tb<sub>0.3</sub>Y<sub>0.7</sub>AG:Ce CCPs possess small thermal quenching (24.7 % loss in luminescence at 225°C) and achieve an optimized CRI of up to 81.6 under LED excitation. Furthermore, these ceramic samples exhibit high lumen efficiency of 200–246 lm·W<sup>−1</sup> and suitable CCT of 4949–5117 K under 18 W·mm<sup>−2</sup> power density, which is of great significance for realizing high-brightness LED/LD lighting.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117333"},"PeriodicalIF":5.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580380","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}

引用次数: 0

Si3N4 ceramics with fine-grained bimodal microstructure and excellent mechanical properties prepared by two-step spark plasma sintering

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-28 DOI: 10.1016/j.jeurceramsoc.2025.117331

Ze-Hua Li , Si-Yuan Tong , Yi-Xin Wang , Jun-Jie Yu , Wei-Ming Guo , Hua-Tay Lin

A novel two-step spark plasma sintering (SPS) strategy was employed to prepare more superior Si₃N₄ ceramics, containing MgO and Yb₂O₃ sintering additives, for increasingly stringent application in this study. The Si₃N₄ ceramics with non-densified fine-grained bimodal microstructure consisting of α- and β-Si₃N₄ phases were initially obtained by the first-step sintering under the condition of at high-temperature of 1750 ℃, low-pressure (10 MPa), and short-holding time (2 min). Then, the Si₃N₄ ceramics were then densified by the second-step sintering at low-temperature of 1550 ℃, high-pressure (30 MPa), and long-holding time (10 min). Using the two-step SPS, Si₃N₄ ceramics with fine-grained bimodal microstructure and excellent mechanical properties (Vickers hardness ∼ 20.5 ± 0.3 GPa, fracture toughness ∼ 7.4 ± 0.3 MPa·m^1/2, flexural strength ∼ 856 ± 89 MPa) were obtained. This study provides a newly innovative approach for the development of sintering routes for high performance Si₃N₄ ceramics.

{"title":"Si3N4 ceramics with fine-grained bimodal microstructure and excellent mechanical properties prepared by two-step spark plasma sintering","authors":"Ze-Hua Li , Si-Yuan Tong , Yi-Xin Wang , Jun-Jie Yu , Wei-Ming Guo , Hua-Tay Lin","doi":"10.1016/j.jeurceramsoc.2025.117331","DOIUrl":"10.1016/j.jeurceramsoc.2025.117331","url":null,"abstract":"<div><div>A novel two-step spark plasma sintering (SPS) strategy was employed to prepare more superior Si<sub>3</sub>N<sub>4</sub> ceramics, containing MgO and Yb<sub>2</sub>O<sub>3</sub> sintering additives, for increasingly stringent application in this study. The Si<sub>3</sub>N<sub>4</sub> ceramics with non-densified fine-grained bimodal microstructure consisting of α- and β-Si<sub>3</sub>N<sub>4</sub> phases were initially obtained by the first-step sintering under the condition of at high-temperature of 1750 ℃, low-pressure (10 MPa), and short-holding time (2 min). Then, the Si<sub>3</sub>N<sub>4</sub> ceramics were then densified by the second-step sintering at low-temperature of 1550 ℃, high-pressure (30 MPa), and long-holding time (10 min). Using the two-step SPS, Si<sub>3</sub>N<sub>4</sub> ceramics with fine-grained bimodal microstructure and excellent mechanical properties (Vickers hardness ∼ 20.5 ± 0.3 GPa, fracture toughness ∼ 7.4 ± 0.3 MPa·m<sup>1/2</sup>, flexural strength ∼ 856 ± 89 MPa) were obtained. This study provides a newly innovative approach for the development of sintering routes for high performance Si<sub>3</sub>N<sub>4</sub> ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117331"},"PeriodicalIF":5.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549147","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}

引用次数: 0

Engineered amorphous interfaces in cold-sintered ZnO-PAN hybrids: Synergistic thermal insulation and nonlinear electrical properties

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-27 DOI: 10.1016/j.jeurceramsoc.2025.117329

Mingming Si , Qi Ding , Peng Wei , Chenxi Deng , Yuchi Fan , Jing Guo

This study presents a method to enhance ZnO ceramics by incorporating amorphous polyacrylonitrile (PAN) grain boundaries. Using an optimized cold sintering process, we synthesized ZnO-PAN composites with relative densities exceeding 92 %. The amorphous PAN interfaces significantly improve both electrical and thermal properties. The ZnO-PAN composites show a 12.5-fold increase in threshold electric field and a 16-fold enhancement in breakdown field strength compared to pure ZnO. The composite with 3 vol% PAN exhibits a high nonlinear coefficient of 13.3, setting a benchmark for ZnO-polymer binary varistors. Additionally, the amorphous grain boundaries enhance phonon scattering, reducing thermal conductivity to 0.72 W/m·K at room temperature. These superior thermal insulation properties, coupled with good varistor performance, highlight the potential of ZnO-PAN composite as a surge protection material with integrated thermal insulation, making it ideal for advanced applications in electric vehicle circuits.

{"title":"Engineered amorphous interfaces in cold-sintered ZnO-PAN hybrids: Synergistic thermal insulation and nonlinear electrical properties","authors":"Mingming Si , Qi Ding , Peng Wei , Chenxi Deng , Yuchi Fan , Jing Guo","doi":"10.1016/j.jeurceramsoc.2025.117329","DOIUrl":"10.1016/j.jeurceramsoc.2025.117329","url":null,"abstract":"<div><div>This study presents a method to enhance ZnO ceramics by incorporating amorphous polyacrylonitrile (PAN) grain boundaries. Using an optimized cold sintering process, we synthesized ZnO-PAN composites with relative densities exceeding 92 %. The amorphous PAN interfaces significantly improve both electrical and thermal properties. The ZnO-PAN composites show a 12.5-fold increase in threshold electric field and a 16-fold enhancement in breakdown field strength compared to pure ZnO. The composite with 3 vol% PAN exhibits a high nonlinear coefficient of 13.3, setting a benchmark for ZnO-polymer binary varistors. Additionally, the amorphous grain boundaries enhance phonon scattering, reducing thermal conductivity to 0.72 W/m·K at room temperature. These superior thermal insulation properties, coupled with good varistor performance, highlight the potential of ZnO-PAN composite as a surge protection material with integrated thermal insulation, making it ideal for advanced applications in electric vehicle circuits.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117329"},"PeriodicalIF":5.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512350","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}

引用次数: 0

Preparation of oxygen vacancy through a pre-energized method to assist flash joining of Y2O3

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-27 DOI: 10.1016/j.jeurceramsoc.2025.117332

Keying Zhang , Tianyu Li , Xuejian Liu , Zhengren Huang , Yan Liu

Oxygen vacancy plays a crucial role in flash joining. In this study, we use a pre-energized method as a defect engineering technology to treat the yttrium oxide before joining, thereby increasing its oxygen vacancy concentration. After the pre-energized treatment, the joint strength is significantly improved by 68.7 % under the same conditions of 1300 ℃ with a current density of 2 mA/mm² for 300 s. This demonstrates that oxygen vacancies promote the flash joining process and reduce its onset conditions. The mechanisms of oxygen vacancy are explored experimentally and theoretically, which are identified in two areas: (1) The migration of vacancies forms fast ionic conduction paths, which allows uniform current flow and competition with established routes to enhance Joule heating. Subsequent grain homogenization further promotes overall superplastic deformation; (2) Driven by an electric field, vacancies will move to the grain boundaries to provide a channel for rapid bonding and accelerate elemental diffusion, and these diffused doping elements maybe further lead to an increase in the superplastic deformation rate.

{"title":"Preparation of oxygen vacancy through a pre-energized method to assist flash joining of Y2O3","authors":"Keying Zhang , Tianyu Li , Xuejian Liu , Zhengren Huang , Yan Liu","doi":"10.1016/j.jeurceramsoc.2025.117332","DOIUrl":"10.1016/j.jeurceramsoc.2025.117332","url":null,"abstract":"<div><div>Oxygen vacancy plays a crucial role in flash joining. In this study, we use a pre-energized method as a defect engineering technology to treat the yttrium oxide before joining, thereby increasing its oxygen vacancy concentration. After the pre-energized treatment, the joint strength is significantly improved by 68.7 % under the same conditions of 1300 ℃ with a current density of 2 mA/mm<sup>2</sup> for 300 s. This demonstrates that oxygen vacancies promote the flash joining process and reduce its onset conditions. The mechanisms of oxygen vacancy are explored experimentally and theoretically, which are identified in two areas: (1) The migration of vacancies forms fast ionic conduction paths, which allows uniform current flow and competition with established routes to enhance Joule heating. Subsequent grain homogenization further promotes overall superplastic deformation; (2) Driven by an electric field, vacancies will move to the grain boundaries to provide a channel for rapid bonding and accelerate elemental diffusion, and these diffused doping elements maybe further lead to an increase in the superplastic deformation rate.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117332"},"PeriodicalIF":5.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528739","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}

引用次数: 0

Effect of morphology of fine-milled powders on the sintering behavior and electromagnetic properties of YIG microwave ferrites

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-26 DOI: 10.1016/j.jeurceramsoc.2025.117327

Xuening Han, Lijun Jia, Wei Xiang, Mingchao Yang, Hao Wu, Jie Li, Huaiwu Zhang

In order to meet the application requirements of next-generation microwave devices, a new approach was proposed to reduce microwave dielectric and magnetic losses by optimizing the liquid-to-solid ratio in secondary ball milling process. The experimental results indicated that the variation in the ratio of anhydrous ethanol volume to powder mass strongly influenced the microstructure evolution process of YIG ferrites. At lower liquid-to-solid ratios, a narrow initial particle size distribution promoted the densification of ferrites. This diminished the contribution of porosity-induced linewidth and decreased microwave dielectric loss. The analysis of sintering behavior revealed that the significant abnormal grain growth hindered the densification process at excessively high liquid-to-solid ratios. This phenomenon was also an important reason for the bipolar characteristics observed in dielectric loss.

引用次数: 0

Fabrication of intricate lunar regolith monoliths via freeze casting

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-26 DOI: 10.1016/j.jeurceramsoc.2025.117328

Sk S. Hossain , Jeffrey W. Bullard

Sustainable materials processing with in-situ resource utilization is a key priority in lunar exploration to minimize dependence on Earth-supplied materials. Freeze casting is used for the first time to manufacture lunar regolith monoliths with complex shapes and controlled porosity. Stable aqueous slurries of a highlands simulant with varying solid loading were prepared using a low-volume polymeric additive and then cast into various intricately shaped molds. The freeze-dried regolith specimens were sintered between 1100 °C and 1180 °C and achieved relative densities of 35–85 % with compressive strengths of 6 MPa to 36 MPa. This technique has great potential to utilize the lunar cold and vacuum environment for the freezing and sublimation steps, which may reduce the energy consumption required for shape fabrication. Ceramics fabricated this way are candidates for insulating components, interlocking structures, and instrument parts, which are essential for sustained lunar operations.

引用次数: 0

Effect of oxygen partial pressure on the preparation of phase-pure YbBa2Cu3O7-y superconductor by solid-state sintering method

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2025-02-25 DOI: 10.1016/j.jeurceramsoc.2025.117325

Yanan Wang , Zerong Zhang , Zhan Gao , Lei Wang , Qiuliang Wang

In preparing REBCO superconductors, the oxygen partial pressure (PO₂) was an important factor that must be considered. In this work, as a typical REBCO superconductor, YbBa₂Cu₃O_7-δ (Yb123) was prepared by solid-state sintering in Ar (100 %), Ar (99.8 %)-O₂ (0.2 %), Ar (99 %)-O₂ (1 %), Ar (98 %)-O₂ (2 %) and air atmospheres, and the effect of PO₂ on the preparation of Yb123 was systematically investigated. The results showed that phase-pure Yb123 samples could be prepared in Ar (99 %)-O₂ (1 %) at 1113 K and Ar (98 %)-O₂ (2 %) at 1133 K, and the samples’ critical transition temperatures were about 90 K. In contrast, Yb123 could not be formed in Ar (100 %) and Ar (99.8 %)-O₂ (0.2 %) atmospheres, suggesting that there was a critical value of PO₂ while preparing Yb123. Furthermore, the relationship between the PO₂ and the optimum temperature range for synthesizing high phase-purity Yb123 could be quantitatively expressed as 30002/T = - lgPO₂/P^o + 24.9.

{"title":"Effect of oxygen partial pressure on the preparation of phase-pure YbBa2Cu3O7-y superconductor by solid-state sintering method","authors":"Yanan Wang , Zerong Zhang , Zhan Gao , Lei Wang , Qiuliang Wang","doi":"10.1016/j.jeurceramsoc.2025.117325","DOIUrl":"10.1016/j.jeurceramsoc.2025.117325","url":null,"abstract":"<div><div>In preparing REBCO superconductors, the oxygen partial pressure (PO<sub>2</sub>) was an important factor that must be considered. In this work, as a typical REBCO superconductor, YbBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> (Yb123) was prepared by solid-state sintering in Ar (100 %), Ar (99.8 %)-O<sub>2</sub> (0.2 %), Ar (99 %)-O<sub>2</sub> (1 %), Ar (98 %)-O<sub>2</sub> (2 %) and air atmospheres, and the effect of PO<sub>2</sub> on the preparation of Yb123 was systematically investigated. The results showed that phase-pure Yb123 samples could be prepared in Ar (99 %)-O<sub>2</sub> (1 %) at 1113 K and Ar (98 %)-O<sub>2</sub> (2 %) at 1133 K, and the samples’ critical transition temperatures were about 90 K. In contrast, Yb123 could not be formed in Ar (100 %) and Ar (99.8 %)-O<sub>2</sub> (0.2 %) atmospheres, suggesting that there was a critical value of PO<sub>2</sub> while preparing Yb123. Furthermore, the relationship between the PO<sub>2</sub> and the optimum temperature range for synthesizing high phase-purity Yb123 could be quantitatively expressed as 30002/T = - lg<em>P</em>O<sub>2</sub>/<em>P</em><sup><em>o</em></sup> + 24.9.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117325"},"PeriodicalIF":5.8,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487567","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}

引用次数: 0

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Journal of The European Ceramic Society

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