Pub Date : 2025-03-01Epub Date: 2025-02-22DOI: 10.1016/j.bsecv.2025.01.005
J. Hidalgo, R. Giménez, A. García-Juarez, C. Berges, G. Herranz
Cordierites have exceptional thermal stability and resistance to thermal shock, rendering them particularly attractive for various industrial applications. Nonetheless, their mechanical properties are relatively modest when compared to other technical ceramics. Besides, their applicability is limited due to the simplicity of shapes achievable through current processing techniques. Reinforcing cordierite with graphene together with advanced manufacturing holds the promise of substantially enhancing their properties, thereby expanding their utility. This study establishes the groundwork for employing ceramic injection moulding (CIM) in the production of complex shape parts made of cordierite reinforced with reduced graphene oxide (rGO). The adequacy of direct rGO addition to the binder components for obtaining homogeneous rGO/powder dispersions and feedstock with good rheology is assessed. The debinding and sintering conditions are adjusted to maintain the graphemic species avoiding their degradation. The prevalence of graphene is tracked and demonstrated in all CIM steps by X-ray analysis and Raman spectroscopy. Sintered parts with properties exceeding that of base cordierite are accomplished, paving the way for innovative applications of cordierite–rGO composites in diverse industrial contexts.
{"title":"Ceramic injection moulding adequacy in the fabrication of graphene reinforced cordierite–mullite for high-temperature applications","authors":"J. Hidalgo, R. Giménez, A. García-Juarez, C. Berges, G. Herranz","doi":"10.1016/j.bsecv.2025.01.005","DOIUrl":"10.1016/j.bsecv.2025.01.005","url":null,"abstract":"<div><div>Cordierites have exceptional thermal stability and resistance to thermal shock, rendering them particularly attractive for various industrial applications. Nonetheless, their mechanical properties are relatively modest when compared to other technical ceramics. Besides, their applicability is limited due to the simplicity of shapes achievable through current processing techniques. Reinforcing cordierite with graphene together with advanced manufacturing holds the promise of substantially enhancing their properties, thereby expanding their utility. This study establishes the groundwork for employing ceramic injection moulding (CIM) in the production of complex shape parts made of cordierite reinforced with reduced graphene oxide (rGO). The adequacy of direct rGO addition to the binder components for obtaining homogeneous rGO/powder dispersions and feedstock with good rheology is assessed. The debinding and sintering conditions are adjusted to maintain the graphemic species avoiding their degradation. The prevalence of graphene is tracked and demonstrated in all CIM steps by X-ray analysis and Raman spectroscopy. Sintered parts with properties exceeding that of base cordierite are accomplished, paving the way for innovative applications of cordierite–rGO composites in diverse industrial contexts.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Pages 122-137"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-03-01Epub Date: 2025-04-22DOI: 10.1016/j.bsecv.2025.04.001
Amador C. Caballero
{"title":"Cambio en la publicación del Boletín","authors":"Amador C. Caballero","doi":"10.1016/j.bsecv.2025.04.001","DOIUrl":"10.1016/j.bsecv.2025.04.001","url":null,"abstract":"","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Page 69"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Transition metal nitrides have gained attraction as electrocatalysts of diverse reactions under acid or basic conditions because of their high electric conductivity and excellent chemical stability. The design and control of porous structures are of great interest to enhance their catalytic ability. Herein, the role of a surfactant (triblock copolymer, Pluronic® F127) on the synthesis of titanium nitride by the urea-glass process is investigated. The effect of the surfactant on the catalytic activity is also elucidated. The addition of the surfactant is found to produce a mesostructured TiN with smaller pore diameters and larger pore volume than those without the use of the surfactant. Moreover, the use of the surfactant in the TiN synthesis leads to an improvement of the catalytic activity. Particularly, a four-electron oxygen reduction reaction (ORR) is observed for the TiN prepared by the surfactant-modified urea-glass process.
{"title":"Synthesis and catalytic activity of TiN particles by surfactant-modified urea-glass process","authors":"Yohei Saika , Sho Ishiyama , Nataly Carolina Rosero-Navarro , Akira Miura , Kiyoharu Tadanaga","doi":"10.1016/j.bsecv.2024.11.002","DOIUrl":"10.1016/j.bsecv.2024.11.002","url":null,"abstract":"<div><div>Transition metal nitrides have gained attraction as electrocatalysts of diverse reactions under acid or basic conditions because of their high electric conductivity and excellent chemical stability. The design and control of porous structures are of great interest to enhance their catalytic ability. Herein, the role of a surfactant (triblock copolymer, Pluronic® F127) on the synthesis of titanium nitride by the urea-glass process is investigated. The effect of the surfactant on the catalytic activity is also elucidated. The addition of the surfactant is found to produce a mesostructured TiN with smaller pore diameters and larger pore volume than those without the use of the surfactant. Moreover, the use of the surfactant in the TiN synthesis leads to an improvement of the catalytic activity. Particularly, a four-electron oxygen reduction reaction (ORR) is observed for the TiN prepared by the surfactant-modified urea-glass process.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Pages 96-101"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-03-01Epub Date: 2025-02-24DOI: 10.1016/j.bsecv.2025.01.004
Caterina Chirico , Ana Ferrández-Montero , Álvaro Eguiluz , Pablo Ortega-Columbrans , Antonio Javier Sanchez-Herencia , Begoña Ferrari
Fused filament fabrication (FFF) is one of the most competitive additive manufacturing technologies which allow easy component customization for several sectors. Its application to the ceramic field is rapidly growing addressed by formulating high-loading composites in several binder systems which after the printing process, they are removed by a two-step debinding process. In this work, new granules and filaments of Al2O3 have been produced using a two-component binder system, consisting of polylactic acid (PLA) and polycaprolactone (PCL). Al2O3 feedstock is printed by FFF obtaining complex 3D structures and after a thermal one-step debinding and sintering cycle 100% Al2O3 components is obtained with a relative density of 96%.
The mixing process is based on a colloidal route where the ceramic particle surface modification improves its interaction with the binder. This improvement brings the possibility to increase the ceramic load in the composite up to 48 vol.%. Oscillatory melting rheology was measured to simulate the printing process. The incorporation of 25 vol.% PCL in binder is enough to modify the flow of the melt composite, enlarging the plastic solid-like flow where the Al2O3 composites are suitable to flow through the nozzle, and build adequate 3D structures using high-loaded feedstocks.
{"title":"Colloidal approach to fabricate high-loaded feedstocks for material extrusion of dense sintered Al2O3 structures for biomedical applications","authors":"Caterina Chirico , Ana Ferrández-Montero , Álvaro Eguiluz , Pablo Ortega-Columbrans , Antonio Javier Sanchez-Herencia , Begoña Ferrari","doi":"10.1016/j.bsecv.2025.01.004","DOIUrl":"10.1016/j.bsecv.2025.01.004","url":null,"abstract":"<div><div>Fused filament fabrication (FFF) is one of the most competitive additive manufacturing technologies which allow easy component customization for several sectors. Its application to the ceramic field is rapidly growing addressed by formulating high-loading composites in several binder systems which after the printing process, they are removed by a two-step debinding process. In this work, new granules and filaments of Al<sub>2</sub>O<sub>3</sub> have been produced using a two-component binder system, consisting of polylactic acid (PLA) and polycaprolactone (PCL). Al<sub>2</sub>O<sub>3</sub> feedstock is printed by FFF obtaining complex 3D structures and after a thermal one-step debinding and sintering cycle 100% Al<sub>2</sub>O<sub>3</sub> components is obtained with a relative density of 96%.</div><div>The mixing process is based on a colloidal route where the ceramic particle surface modification improves its interaction with the binder. This improvement brings the possibility to increase the ceramic load in the composite up to 48<!--> <!-->vol.%. Oscillatory melting rheology was measured to simulate the printing process. The incorporation of 25<!--> <!-->vol.% PCL in binder is enough to modify the flow of the melt composite, enlarging the plastic solid-like flow where the Al<sub>2</sub>O<sub>3</sub> composites are suitable to flow through the nozzle, and build adequate 3D structures using high-loaded feedstocks.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Pages 102-121"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-03-01Epub Date: 2025-04-10DOI: 10.1016/j.bsecv.2025.03.003
Miguel Ángel Morales-Zapata, Ángel Larrea, Miguel Ángel Laguna-Bercero
This study analyzes the structural and electrochemical properties of praseodymium- and gadolinium-doped ceria (CPGO) samples formed by the sintering reaction of Pr2NiO4+δ (PNO) and Ce0.9Gd0.1O2−δ (GDC). X-ray powder diffraction analysis confirmed a single-phase cubic CPGO structure as a primary phase. The cationic compositions were determined using energy dispersive spectroscopy (EDS) in a scanning transmission electron microscope (STEM), while core-loss electron energy-loss spectroscopy (EELS) was used to determine the valence of Ce and Pr. The compatibility between thermal expansion coefficients validated their integration with electrolytes at the typical Solid Oxide Cell (SOC) operation temperatures. Oxygen chemical diffusion and surface exchange coefficients were investigated using the electrical conductivity relaxation (ECR) method at intervals of partial oxygen pressures between 0.10 and 0.21 atm and 600 °C and 800 °C. Finally, the samples were tested in symmetrical cells by electrochemical impedance spectroscopy (EIS) between 700 °C and 850 °C. A polarization resistance of 0.17 Ω cm2 at 850 °C was obtained for CPGO air electrodes formed by sintering a mixture of 80% by weight of GDC and 20% by weight of PNO. These findings confirm that PNO–GDC mixtures forming CPGO oxides are excellent candidates for SOC applications.
{"title":"Praseodymium and gadolinium doped ceria as oxygen electrode for solid oxide cell applications","authors":"Miguel Ángel Morales-Zapata, Ángel Larrea, Miguel Ángel Laguna-Bercero","doi":"10.1016/j.bsecv.2025.03.003","DOIUrl":"10.1016/j.bsecv.2025.03.003","url":null,"abstract":"<div><div>This study analyzes the structural and electrochemical properties of praseodymium- and gadolinium-doped ceria (CPGO) samples formed by the sintering reaction of Pr<sub>2</sub>NiO<sub>4+<em>δ</em></sub> (PNO) and Ce<sub>0.9</sub>Gd<sub>0.1</sub>O<sub>2−<em>δ</em></sub> (GDC). X-ray powder diffraction analysis confirmed a single-phase cubic CPGO structure as a primary phase. The cationic compositions were determined using energy dispersive spectroscopy (EDS) in a scanning transmission electron microscope (STEM), while core-loss electron energy-loss spectroscopy (EELS) was used to determine the valence of Ce and Pr. The compatibility between thermal expansion coefficients validated their integration with electrolytes at the typical Solid Oxide Cell (SOC) operation temperatures. Oxygen chemical diffusion and surface exchange coefficients were investigated using the electrical conductivity relaxation (ECR) method at intervals of partial oxygen pressures between 0.10 and 0.21<!--> <!-->atm and 600<!--> <!-->°C and 800<!--> <!-->°C. Finally, the samples were tested in symmetrical cells by electrochemical impedance spectroscopy (EIS) between 700<!--> <!-->°C and 850<!--> <!-->°C. A polarization resistance of 0.17<!--> <!-->Ω<!--> <!-->cm<sup>2</sup> at 850<!--> <!-->°C was obtained for CPGO air electrodes formed by sintering a mixture of 80% by weight of GDC and 20% by weight of PNO. These findings confirm that PNO–GDC mixtures forming CPGO oxides are excellent candidates for SOC applications.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Pages 138-149"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-03-01Epub Date: 2024-10-25DOI: 10.1016/j.bsecv.2024.10.001
Julio Cesar Leal-Zayas , Ramón Álvaro Vargas-Ortiz , Jorge Luis Almaral-Sánchez , Jose Miguel Mendivil-Escalante , Roberto Silva-González , Karla Mariela Moya-Canul , Jesús Iván Peña-Flores , José Martín Yáñez-Limón
Ferroelectric materials have attracted significant attention in recent decades because they can be used in various electronic devices. BiFeO3 (BFO) has a perovskite-type ABO3 structure with antiferromagnetic and ferroelectric properties and a band gap within the visible light range, making it a promising candidate for use in sensors and solar cells. In this study, BiFeO3 thin films were grown by radio frequency (RF) sputtering using a homemade target and sintered at different times to evaluate the influence of sintering time on their physical properties. Its physical properties were evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. These results revealed that all films maintained a perovskite-like structure with rhombohedral and bismuth-rich secondary phases (Bi2O2.33). Atomic force microscopy (AFM) and piezoresponse force micrography (PFM) images depicted the impact of sintering time on surface roughness and ferroelectric domain reorientation. The optical properties, such as n, k, and the band gap of all samples, were obtained using reflection-transmission spectroscopy. The photoresponse under dark, visible and UV illumination were evaluated on BFO films grown over glass-FTO substrate.
{"title":"Study of the physical properties of BiFeO3 films obtained by RF sputtering using a homemade target","authors":"Julio Cesar Leal-Zayas , Ramón Álvaro Vargas-Ortiz , Jorge Luis Almaral-Sánchez , Jose Miguel Mendivil-Escalante , Roberto Silva-González , Karla Mariela Moya-Canul , Jesús Iván Peña-Flores , José Martín Yáñez-Limón","doi":"10.1016/j.bsecv.2024.10.001","DOIUrl":"10.1016/j.bsecv.2024.10.001","url":null,"abstract":"<div><div>Ferroelectric materials have attracted significant attention in recent decades because they can be used in various electronic devices. BiFeO<sub>3</sub> (BFO) has a perovskite-type ABO<sub>3</sub> structure with antiferromagnetic and ferroelectric properties and a band gap within the visible light range, making it a promising candidate for use in sensors and solar cells. In this study, BiFeO<sub>3</sub> thin films were grown by radio frequency (RF) sputtering using a homemade target and sintered at different times to evaluate the influence of sintering time on their physical properties. Its physical properties were evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. These results revealed that all films maintained a perovskite-like structure with rhombohedral and bismuth-rich secondary phases (Bi<sub>2</sub>O<sub>2.33</sub>). Atomic force microscopy (AFM) and piezoresponse force micrography (PFM) images depicted the impact of sintering time on surface roughness and ferroelectric domain reorientation. The optical properties, such as <em>n</em>, <em>k</em>, and the band gap of all samples, were obtained using reflection-transmission spectroscopy. The photoresponse under dark, visible and UV illumination were evaluated on BFO films grown over glass-FTO substrate.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Pages 86-95"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-03-01Epub Date: 2024-09-24DOI: 10.1016/j.bsecv.2024.09.003
Daniel López-Rodríguez , Jorge Jordan-Nuñez , Ruperto Bermejo-Román , Bàrbara Micó-Vicent , Antonio Belda
This work addresses the use of Laponite® clay in various applications, focusing on its adsorption capacity and improvement of properties in water-based products. It describes the synthesis of Laponite® hybrids with the pigmented cyanobacterium phycocyanin (PC) to evaluate the adsorption capacity of the dye. This research addresses the importance of Laponite® clay in improving rheological properties of water-based products due to its ability to interact with components in aqueous solutions. Laponite® can be effectively dispersed in water, enhancing the dispersion of other elements in solution and preventing aggregation of solids. The structure and properties of synthetic Laponite® are described, highlighting its use in the textile industry as an additive for pigments and the formation of gels. Experimentally, Laponite® is used to adsorb phycocyanin, a cyanobacterial pigment, with the aim of achieving maximum adsorption. A design of experiments with different experimental conditions, including pH, addition of silane and surfactant, is used. A detailed analysis of the characterization of the resulting hybrids is presented, including colour, total solar reflectance (TSR), thermal analysis (TGA), EDS, FTIR and X-ray diffraction (XRD) measurements. The results show successful adsorption of the pigment in all experiments, with adsorption percentages above 97%. The colour of the hybrids is evaluated and the total solar reflectance is analyzed, highlighting their importance in applications such as coatings and printed textiles. Infrared spectroscopy and X-ray diffraction are used to study the structural properties of the hybrids. For future work, it is intended to be able to apply the hybrids obtained on an industrial scale in the colouring of textiles and plastic polymers.
{"title":"Adsorption of natural dye phycocyanin by means of Laponite®: Synthesis and characterization of the hybrid obtained","authors":"Daniel López-Rodríguez , Jorge Jordan-Nuñez , Ruperto Bermejo-Román , Bàrbara Micó-Vicent , Antonio Belda","doi":"10.1016/j.bsecv.2024.09.003","DOIUrl":"10.1016/j.bsecv.2024.09.003","url":null,"abstract":"<div><div>This work addresses the use of Laponite® clay in various applications, focusing on its adsorption capacity and improvement of properties in water-based products. It describes the synthesis of Laponite® hybrids with the pigmented cyanobacterium phycocyanin (PC) to evaluate the adsorption capacity of the dye. This research addresses the importance of Laponite® clay in improving rheological properties of water-based products due to its ability to interact with components in aqueous solutions. Laponite® can be effectively dispersed in water, enhancing the dispersion of other elements in solution and preventing aggregation of solids. The structure and properties of synthetic Laponite® are described, highlighting its use in the textile industry as an additive for pigments and the formation of gels. Experimentally, Laponite® is used to adsorb phycocyanin, a cyanobacterial pigment, with the aim of achieving maximum adsorption. A design of experiments with different experimental conditions, including pH, addition of silane and surfactant, is used. A detailed analysis of the characterization of the resulting hybrids is presented, including colour, total solar reflectance (TSR), thermal analysis (TGA), EDS, FTIR and X-ray diffraction (XRD) measurements. The results show successful adsorption of the pigment in all experiments, with adsorption percentages above 97%. The colour of the hybrids is evaluated and the total solar reflectance is analyzed, highlighting their importance in applications such as coatings and printed textiles. Infrared spectroscopy and X-ray diffraction are used to study the structural properties of the hybrids. For future work, it is intended to be able to apply the hybrids obtained on an industrial scale in the colouring of textiles and plastic polymers.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 2","pages":"Pages 70-85"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-01-01Epub Date: 2025-01-28DOI: 10.1016/j.bsecv.2024.12.001
Karina Salazar , Ángel Murciano , Pablo Velásquez , Piedad N. De Aza
In this study, 3D multilayer scaffolds were fabricated by sol–gel and polymeric replication methods. The principal objective was to fabricate scaffolds based on a core of Ca2SiO4/Ca2P6O17 (C2S/P6) to obtain mechanical resistance following by external layers with composition Ca2SiO4 (C2S) doped with several amount of SrCO3 (Sr = 0–2.5 wt%) to generate modulated bioactivity.
This scaffold was characterized from the physical, chemical and mineralogical point of view. Finally, the effect of the dopant on the surface morphology and how it affects the bioactivity was carried out according to the ISO 23317.2017 standard.
The obtained scaffolds exhibited an open porosity of 80–90% and a maximum mechanical strength of 1.2 ± 0.1 MPa. The scaffolds containing Sr2+ demonstrated bioactivity that could be modulated according to the Sr content. The results revealed that bioactivity occurred only when the scaffolds were coated with outer layers of strontium. Scaffolds doped with 1 and 1.5 wt% Sr displayed bioactivity after 3 days in simulated body fluid (SBF), while the 2.5 wt% Sr sample did not show bioactivity at any time.
{"title":"Obtaining characterization and in vitro behavior of 3D multilayer ceramic scaffolds Ca2SiO4/Ca2P6O17/Ca2SiO4-XSr","authors":"Karina Salazar , Ángel Murciano , Pablo Velásquez , Piedad N. De Aza","doi":"10.1016/j.bsecv.2024.12.001","DOIUrl":"10.1016/j.bsecv.2024.12.001","url":null,"abstract":"<div><div>In this study, 3D multilayer scaffolds were fabricated by sol–gel and polymeric replication methods. The principal objective was to fabricate scaffolds based on a core of Ca<sub>2</sub>SiO4/Ca<sub>2</sub>P<sub>6</sub>O<sub>17</sub> (C<sub>2</sub>S/P<sub>6</sub>) to obtain mechanical resistance following by external layers with composition Ca<sub>2</sub>SiO<sub>4</sub> (C<sub>2</sub>S) doped with several amount of SrCO<sub>3</sub> (Sr<!--> <!-->=<!--> <!-->0–2.5<!--> <!-->wt%) to generate modulated bioactivity.</div><div>This scaffold was characterized from the physical, chemical and mineralogical point of view. Finally, the effect of the dopant on the surface morphology and how it affects the bioactivity was carried out according to the ISO 23317.2017 standard.</div><div>The obtained scaffolds exhibited an open porosity of 80–90% and a maximum mechanical strength of 1.2<!--> <!-->±<!--> <!-->0.1<!--> <!-->MPa. The scaffolds containing Sr<sup>2+</sup> demonstrated bioactivity that could be modulated according to the Sr content. The results revealed that bioactivity occurred only when the scaffolds were coated with outer layers of strontium. Scaffolds doped with 1 and 1.5<!--> <!-->wt% Sr displayed bioactivity after 3 days in simulated body fluid (SBF), while the 2.5<!--> <!-->wt% Sr sample did not show bioactivity at any time.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 1","pages":"Pages 57-68"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-01-01Epub Date: 2025-02-14DOI: 10.1016/j.bsecv.2025.02.001
Amador C. Caballero
{"title":"Inteligencia artificial y materiales II","authors":"Amador C. Caballero","doi":"10.1016/j.bsecv.2025.02.001","DOIUrl":"10.1016/j.bsecv.2025.02.001","url":null,"abstract":"","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 1","pages":"Page 1"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2025-01-01Epub Date: 2024-09-25DOI: 10.1016/j.bsecv.2024.09.004
Linda Viviana García-Quiñonez , Adolfo López-Liévano , Adolfo Collado-Hernández , Nora Elizondo-Villarreal , Eden Amaral Rodríguez-Castellanos , Guadalupe Alan Castillo-Rodríguez , Nayely Pineda-Aguilar , José Eduardo Terrazas-Rodríguez , Daniel Fernández-González , Cristian Gómez-Rodríguez
Selective laser sintering (SLS) is a novel additive manufacturing technique that has been recently applied to the sintering of powdered materials. In this work, radiation with laser was applied to a ceramic oxide powder blend to develop semi-transparent ceramic spheres. The powders bed consisted of different ceramics oxides which were irradiated with a continuous CO2 laser (λ = 10.6 μm) with a power density of 155 W/cm2, at both; static (punctually radiated) and non-static (dynamic) conditions. X-ray diffraction confirmed the presence of silicate phases, “gehlenite type”. Punctually radiated samples show semi-spheres with a completely sintered surface without visible cracks, however there were aggregates that did not fuse in the matrix. On the contrary, the use of dynamic radiation decreased the number of aggregates in the ceramic spheres, and a homogeneous sintered surface was obtained. Raman spectra show the introduction of the ceramic oxides into the silica matrix when the powder blend is punctually radiated with laser, while the dynamic parameters aid the crystallization of the silica matrix. Therefore, laser sintering using a continuous laser source with non-static radiation is a better alternative to produce semi-transparent ceramic spheres from a ceramic oxide powder bed with greater densification and better optical properties in transmittance–reflectance.
{"title":"Synthesis and characterization of semi-transparent gehlenite ceramic spheres obtained by selective laser sintering","authors":"Linda Viviana García-Quiñonez , Adolfo López-Liévano , Adolfo Collado-Hernández , Nora Elizondo-Villarreal , Eden Amaral Rodríguez-Castellanos , Guadalupe Alan Castillo-Rodríguez , Nayely Pineda-Aguilar , José Eduardo Terrazas-Rodríguez , Daniel Fernández-González , Cristian Gómez-Rodríguez","doi":"10.1016/j.bsecv.2024.09.004","DOIUrl":"10.1016/j.bsecv.2024.09.004","url":null,"abstract":"<div><div>Selective laser sintering (SLS) is a novel additive manufacturing technique that has been recently applied to the sintering of powdered materials. In this work, radiation with laser was applied to a ceramic oxide powder blend to develop semi-transparent ceramic spheres. The powders bed consisted of different ceramics oxides which were irradiated with a continuous CO<sub>2</sub> laser (<em>λ</em> <!-->=<!--> <!-->10.6<!--> <!-->μm) with a power density of 155<!--> <!-->W/cm<sup>2</sup>, at both; static (punctually radiated) and non-static (dynamic) conditions. X-ray diffraction confirmed the presence of silicate phases, “gehlenite type”. Punctually radiated samples show semi-spheres with a completely sintered surface without visible cracks, however there were aggregates that did not fuse in the matrix. On the contrary, the use of dynamic radiation decreased the number of aggregates in the ceramic spheres, and a homogeneous sintered surface was obtained. Raman spectra show the introduction of the ceramic oxides into the silica matrix when the powder blend is punctually radiated with laser, while the dynamic parameters aid the crystallization of the silica matrix. Therefore, laser sintering using a continuous laser source with non-static radiation is a better alternative to produce semi-transparent ceramic spheres from a ceramic oxide powder bed with greater densification and better optical properties in transmittance–reflectance.</div></div>","PeriodicalId":56330,"journal":{"name":"Boletin de la Sociedad Espanola de Ceramica y Vidrio","volume":"64 1","pages":"Pages 21-32"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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