Journal of The European Ceramic Society最新文献_第8页

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

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

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

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

{"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

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

{"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

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

{"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

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

{"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

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

引用次数: 0

Fabrication of intricate lunar regolith monoliths via freeze casting

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-26 DOI: 10.1016/j.jeurceramsoc.2025.117328

Sk S. Hossain , Jeffrey W. Bullard

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

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

{"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

Modulation of rare-earth diffusion for tailoring diverse MLCC application requirements

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-25 DOI: 10.1016/j.jeurceramsoc.2025.117326

Kyung Joo Lee , Jae Won Lee , Changgeon Lee , Minju Kim , Ohhun Gwon , Seungwoo Son , Byung Sung Kang , Woo-Jin Choi , Wook Jo , Seok-Hyun Yoon , Yunjung Park , Jinsung Chun

{"title":"Modulation of rare-earth diffusion for tailoring diverse MLCC application requirements","authors":"Kyung Joo Lee , Jae Won Lee , Changgeon Lee , Minju Kim , Ohhun Gwon , Seungwoo Son , Byung Sung Kang , Woo-Jin Choi , Wook Jo , Seok-Hyun Yoon , Yunjung Park , Jinsung Chun","doi":"10.1016/j.jeurceramsoc.2025.117326","DOIUrl":"10.1016/j.jeurceramsoc.2025.117326","url":null,"abstract":"<div><div>This study demonstrates that the low shell-forming temperatures of Mg in powdered form can effectively control Dy diffusion into BaTiO<sub>3</sub>. For Dy pre-coated BaTiO<sub>3</sub>, the insulation resistance is higher due to an increased shell thickness compared to Mg pre-coated BaTiO<sub>3</sub>. However, the thermal activation energy and ohmic conduction slope exhibit comparable values for both Dy and Mg pre-coated BaTiO<sub>3</sub>. Moreover, the high resistance and low dielectric permittivity observed in Dy pre-coated BaTiO<sub>3</sub> are attributed to B-site substitution of BaTiO<sub>3</sub> by the significant Dy dopant content. In contrast, the high coercive field and low resistance for Mg pre-coated BaTiO<sub>3</sub> result from Dy aggregation caused by inhibited Dy diffusion. This study offers valuable insights into optimizing rare-earth element diffusion strategies to satisfy diverse application requirements in multilayer ceramic capacitors.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117326"},"PeriodicalIF":5.8,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510647","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

Samarium monosulfide ceramics: Preparation and properties

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-23 DOI: 10.1016/j.jeurceramsoc.2025.117319

Aleksei A. Polkovnikov , Ilya O. Yurev , Maxim S. Molokeev , Aleksandr P. Tyutyunnik , Roza I. Gulyaeva , Nikita A. Shulaev , Maxim V. Kudomanov , Vitaly G. Bamburov , Oleg V. Andreev

{"title":"Samarium monosulfide ceramics: Preparation and properties","authors":"Aleksei A. Polkovnikov , Ilya O. Yurev , Maxim S. Molokeev , Aleksandr P. Tyutyunnik , Roza I. Gulyaeva , Nikita A. Shulaev , Maxim V. Kudomanov , Vitaly G. Bamburov , Oleg V. Andreev","doi":"10.1016/j.jeurceramsoc.2025.117319","DOIUrl":"10.1016/j.jeurceramsoc.2025.117319","url":null,"abstract":"<div><div>Samarium monosulfide (SmS) is a unique tensometric material. For the first time, SmS ceramics for magnetron sputtering films were synthesized. A powder of up to 100 mol% SmS was produced via the reaction of γ-Sm<sub>2</sub>S<sub>2.98</sub> with excess metallic samarium vapor. The conditions for target and side reactions were determined. SmS ceramic targets were fabricated by pressing under standard conditions and annealed at high temperatures. Ceramic properties—density, hardness, and compressive strength—improved with increasing pressing pressure. Conditions for stable magnetron discharge over the SmS target were established. The composition of films deposited on silicon substrates varies with the substrate-to-target angle, transitioning from SmS<sub>1.9</sub> to SmS. During magnetron discharge, SmS dissociates into samarium and sulfur, with their distribution approximated by angular equations. High-mass Sm and SmS particles distribute radially, while sulfur concentration forms an ellipse elongated toward low angles. The deposition angle range for SmS was determined.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117319"},"PeriodicalIF":5.8,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512407","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