Effects of Sintering Method and Sintering Temperature on the Microstructure and Properties of Porous Y_2SiO_5

作     者：Zhen Wu Luchao Sun Jingyang Wang 

作者机构：University of Science and Technology of China High-performance Ceramics DivisionShenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2015年第31卷第12期

页      面：1237-1243页

核心收录：

学科分类：0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.51032006 and 51372252 

主　　题：Porous Y 2SiO5 ceramic In situ synthesis Mechanical property Thermal property 

摘      要：Porous Y 2SiO 5 ceramic is a promising high-temperature thermal insulator in harsh ***,all the published relevant works faced serious problems,such as severe linear shrinkage,low porosity and low *** this study,porous Y 2SiO 5 ceramic with low sintering shrinkage and high porosity was successfully prepared by foam-gelcasting method using gelatin as the gelling *** effects of sintering methods,including in situ reaction sintering and direct sintering,and sintering temperatures on the phase composition,microstructure,shrinkage,porosity,and compressive strength of porous Y 2SiO 5were *** with samples fabricated by direct sintering,porous Y 2SiO 5 ceramic prepared via in situ reaction sintering method has the merits of the low linear shrinkage of 1.0%-4.7%,low bulk density of 0.79-0.88 g/cm^3,high porosity of 82.1%-80.1%,and high strength of 3.54-8.03 MPa,when the sintering temperatures increase from 1350 to 1550 ℃.Porous Y 2SiO 5 has unique multiple pore structures,especially containing the interconnected small pores in *** thermal conductivity of porous Y 2SiO 5 is very low,which is 0.228 W/（m·K） for the sample with a porosity of 79.6%.This work reports an optimal processing method of highly porous Y 2SiO 5 with the potential application as high-temperature thermal insulation material.