中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
ZrSi2-MgO as novel additives for high thermal conductivity of beta-Si3N4 ceramics

文献类型:期刊论文

作者Wang, Weide; Yao, Dongxu; Chen, Huanbei; Xia, Yongfeng; Zuo, Kaihui; Yin, Jinwei; Liang, Hanqin; Zeng, Yu-Ping
刊名JOURNAL OF THE AMERICAN CERAMIC SOCIETY
出版日期2019-12-31
ISSN号0002-7820
关键词silicon nitride sintering thermal conductivity ZrSi2
DOI10.1111/jace.16902
文献子类Article; Early Access
英文摘要A novel ZrSi2-MgO system was used as sintering additive for fabricating high thermal conductivity silicon nitride ceramics by gas pressure sintering at 1900 degrees C for 12 hours. By keeping the total amount of additives at 7 mol% and adjusting the amount of ZrSi2 in the range of 0-7 mol%, the effect of ZrSi2 addition on sintering behaviors and thermal conductivity of silicon nitride were investigated. It was found that binary additives ZrSi2-MgO were effective for the densification of Si3N4 ceramics. XRD observations demonstrated that ZrSi2 reacted with native silica on the Si3N4 surface to generate ZrO2 and beta-Si3N4 grains. TEM and in situ dilatometry confirmed that the as formed ZrO2 collaborated with MgO and Si3N4 to form Si-Zr-Mg-O-N liquid phase promoting the densification of Si3N4. Abnormal grain growth was promoted by in situ generated beta-Si3N4 grains. Consequently, compared to ZrO2-doped materials, the addition of ZrSi2 led to enlarged grains, extremely thin grain boundary film and high contiguity of Si3N4-Si3N4 grains. Ultimately, the thermal conductivity increased by 34.6% from 84.58 to 113.91 W center dot(m center dot K)(-1) when ZrO2 was substituted by ZrSi2.
WOS关键词BONDED SILICON-NITRIDE ; SI3N4 CERAMICS ; MECHANICAL-PROPERTIES ; ELECTRICAL-PROPERTIES ; OXYGEN-CONTENT ; MICROSTRUCTURAL EVOLUTION ; FRACTURE-TOUGHNESS ; MGSIN2 ADDITION ; PARTICLE-SIZE ; FABRICATION
WOS研究方向Materials Science
语种英语
出版者WILEY
源URL[http://ir.sic.ac.cn/handle/331005/27475]  
专题中国科学院上海硅酸盐研究所
推荐引用方式
GB/T 7714
Wang, Weide,Yao, Dongxu,Chen, Huanbei,et al. ZrSi2-MgO as novel additives for high thermal conductivity of beta-Si3N4 ceramics[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2019.
APA Wang, Weide.,Yao, Dongxu.,Chen, Huanbei.,Xia, Yongfeng.,Zuo, Kaihui.,...&Zeng, Yu-Ping.(2019).ZrSi2-MgO as novel additives for high thermal conductivity of beta-Si3N4 ceramics.JOURNAL OF THE AMERICAN CERAMIC SOCIETY.
MLA Wang, Weide,et al."ZrSi2-MgO as novel additives for high thermal conductivity of beta-Si3N4 ceramics".JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2019).

入库方式: OAI收割

来源:上海硅酸盐研究所

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