Fabrication and Characterization of In Situ Porous Si3N4-Si2N2O-BN Ceramic

被引:22
作者
Wang, Shengjin [1 ]
Yang, Zhihua [1 ]
Duan, Xiaoming [1 ]
Jia, Dechang [1 ]
Ma, Feixiang [1 ]
Sun, Boqian [1 ]
Zhou, Yu [1 ]
机构
[1] Harbin Inst Technol, Inst Adv Ceram, Harbin 150001, Peoples R China
基金
中国国家自然科学基金;
关键词
SILICON-NITRIDE; MECHANICAL-PROPERTIES; DIELECTRIC-PROPERTIES; COMPRESSIVE STRENGTH; MICROSTRUCTURE; BEHAVIOR; SIZE;
D O I
10.1111/ijac.12134
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Porous Si3N4-Si2N2O-BN ceramic was fabricated at 1750 degrees C using Si3N4, BN, and (NH4)(2)HPO4 as starting materials. During the sintering process, oxygen from the decomposed products of (NH4)(2)HPO4 would bond Si and N in the liquid phase to form Si2N2O. The microstructure and properties of the porous ceramics were investigated. With the (NH4)(2)HPO4 content varied from 10 to 50 vol.%, porosity of the porous Si3N4-Si2N2O-BN ceramic increased from 43.5% to 51%. The microstructure, mechanical, and dielectric properties was well controlled by adjusting (NH4)(2)HPO4 contents. The present technique offers a more simple way of synthesizing porous Si3N4-Si2N2O-BN ceramics.
引用
收藏
页码:832 / 838
页数:7
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