Enhancement of Sinter Densification of SrO-BaO-Nb_2O_5-SiO_2 Tungsten-Bronze Glass-Ceramics by Doping with P_2O_5

作     者：J.C.Chen Y.Zhang 

作者机构：Shenyang Research and Development Centre for Advanced MaterialsInstitute of Metal ResearchChinese Academy of Sciences State Key Laboratory of New Ceramics and Fine ProcessingInstitute of Nuclear and New Energy TechnologyTsinghua University 

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

年 卷 期：2013年第29卷第8期

页      面：731-736页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 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：Financial supports from the National Natural Science Foundation of China(No.50902082) the State Key Laboratory of Electrical Insulation and Power Equipment (EIPEl 1208) 

主　　题：Sintering densification DieLectric properties Glass-ceramic 

摘      要：Densification behaviors of SrO-BaO-Nb2O5-SiO2 based glass-ceramics prepared by conventional sintering were investigated with an emphasis on the influence of P2O5 content. Although P2O5 dopant did not modify the surface crystallization mechanism, it resulted in a decrease of the glass transition temperature, which facilitates the viscous glass flow necessary for sintering. However, premature crystallization of （Sr, Ba）Nb2O6 induced by addition of excess amount of P2O5 essentially retarded sintering due to the formation of closed pores in the matrix. The SrO-BaO-Nb2O5-SiO2 glass with 1.0 mol% P2O5 （SBN-1P） showed the best sinter densification, which was accomplished at about 850 ℃.