Preparation and Properties of Si2N2O Ceramics for Microwave Sintering Furnaces  

作　　者：ZHENG Han LI Wei DU Jiaolong LI Hongxia LIU Guoqi CHEN Zihao CHEN Yongqiang 

机构地区：[1]Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China [2]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《China's Refractories》2020年第2期42-46,共5页中国耐火材料（英文版）

基　　金：The authors would like to thank the National Key R&D Program of China(2017YFB0304000);National Natural Science Foundation of China(51932008,51772277);Central China Thousand Talents Project(2042005100111).

摘　　要：Si2N2O ceramics were prepared using amorphous Si3N4 as the raw material and Li2CO3 as the sintering additive through vacuum multi-stage sintering.The influence of the Li2CO3 addition(0%,1%,2%,3%,and 5%,by mass)on the phase composition,the microstructure,the porosity,the mechanical properties,the dielectric constant and the tangent of the dielectric loss angle of the porous Si2N2O ceramics was investigated.The results reveal that a suitable addition of Li2CO3 can promote the generation of Si2N2O but excessive or inadequate Li2CO3 causes decomposition of Si2N2O ceramics.The prepared porous Si2N2O ceramics have good mechanical properties,good thermal shock resistance,and low dielectric properties,which have excellent potential for application in microwave sintering furnaces.

关 键 词：Si2N2O porous ceramics lithium carbonate vacuum sintering dielectric properties microwave sintering 

分 类 号：TQ174.75[化学工程—陶瓷工业]