Preparation and dielectric properties Barium strontium titanate niobate composite ceramics by powder-sol method
Barium strontium titanate niobate (BST/SBN) composite ceramics system following the general formula 0.7BaO·0.3SrO·(1-y)TiO2·yNb2O5 were firstly prepared by the modified Powder-Sol method.By controlling the viscosity of the sol solution,Nb2O5 powders was uniformly suspended in the BST Sol.Powders obtained from dried gels were calcined at 800 ℃ for 3h.The samples were prepared at a pressure of 300MPa from dried powders.The bulk samples were sintered at 1200 ℃ for 3 h.The results of the XRD indicate that the perovskite phase and the tungsten bronze phase coexisted stably in BST/SBN.The relative dielectric constants (εr) and dielectric loss (tanδ) of 0.3SrO·0.7BaO·yNb2O5·(1-y)TiO2 are improved when the values ofy is 0.4~0.6.
Powder-sol dielectric properties perovskite phase tungsten bronze phase
Shan Lianwei Wang Jihua Li Wei Wu Ze Dong Limin Han Zhidong Zhang Xianyou
Department of Materials Science and Engineering, Harbin University of Science and Technology, China 150040
国际会议
上海
英文
277-277
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）