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

来源：

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2014年 / 11卷 / 05期

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

页码：832 / 838

页数：7

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