Synthesis and Microstructure of Partly-oriented Bismuth Layer Structure Ferroelectrics Ceramics SrBi_4Ti_4O_(15)  

作　　者：郝华 

机构地区：[1]School of Material Science and Engineering, Wuhan University of Technology [2]Key Laboratory for Silicate Materials Science and Engineering, Wuhan University of Technology, Ministry of Education, Wuhan 430070

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2005年第3期52-54,共3页武汉理工大学学报（材料科学英文版）

基　　金：SupportedbyMainProjectofMinistryofEducationofChinaandNationalNaturalScienceFoundationofChina(No.50472016)

摘　　要：SrBi4Ti4O15 powder was synthesized by conventional solid state synthesis （ CS ） and molten salt synthesis （ MSS ） . MSS method can synthesize plate-like SrBi4Ti4O15 at lower temperature （900℃） than CS method. Plate-like form becomes more distinct when the synthesis temperature increases. This would help cause the grain orientation of the ceramics after sintering. The sintered samples of MSS had grain orientation at （0,0, 10） plane. The degree of （0,0,10） grain orientation F was 62.1% . Hot pressing made （0,0,10） grain orientation more distinct （ F = 85.7% ）. The microstructures of the sintered samples were detected by SEM. Due to the grain orientation the density of samples fabricated by MSS was lower than that of prepared by CS.SrBi4Ti4O15 powder was synthesized by conventional solid state synthesis （ CS ） and molten salt synthesis （ MSS ） . MSS method can synthesize plate-like SrBi4Ti4O15 at lower temperature （900℃） than CS method. Plate-like form becomes more distinct when the synthesis temperature increases. This would help cause the grain orientation of the ceramics after sintering. The sintered samples of MSS had grain orientation at （0,0, 10） plane. The degree of （0,0,10） grain orientation F was 62.1% . Hot pressing made （0,0,10） grain orientation more distinct （ F = 85.7% ）. The microstructures of the sintered samples were detected by SEM. Due to the grain orientation the density of samples fabricated by MSS was lower than that of prepared by CS.

关 键 词：molten salt synthesis bismuth layer structure ferroelectrics gain orientation hot pressing sinter 

分 类 号：TQ174[化学工程—陶瓷工业]