柠檬酸-硝酸盐燃烧法制备Ba_(0.5)Sr_(0.5)TiO_3介电材料  

Ba_(0.5)Sr_(0.5)TiO_3 Dielectric Materials Prepared by Citrate-nitrate Combustion

作　　者：沈彩[1] 刘庆峰[1] 刘茜[1] 

机构地区：[1]中国科学院上海硅酸盐所高性能陶瓷和超微结构国家重点实验室,上海200050

出　　处：《无机材料学报》2004年第3期681-685,共5页Journal of Inorganic Materials

基　　金：自然科学基金委主任基金项目(20151003/B01);上海市科委专项(0259nm021)

摘　　要：以硝酸钡、硝酸锶,钛酸四丁脂以及氨水为原料,利用柠檬酸-硝酸盐燃烧法制备了Ba_(0.5)Sr_(0.5)TiO_3(BST)超细粉末。详细研究了pH值、分散剂对形成BST粉末粒度的影响.用所合成的粉末压片,1300℃烧结2h即可获得致密烧结体,烧结样品的平均粒径约为1μm.在10kHz,25℃下的介电性能为:介电常数1470,介电损耗0.006。Ultra-fine Ba0.5Sr0.5TiO3 (BST) powder was prepared by using barium nitrate, strontium nitrate, tetra-n-butyl titanate, and ammonium hydroxide via citrate-nitrate combustion process. The pH value and dispersant, strongly influencing on the particle distribution of BST powder, were investigated in detail. The precursor powders were pressed into tablets (phi=20.0mm, d=5.0 mm)and then fully sintered at 1300degreesC for 2h. At 25degreesC, the dielectric constant and dissipation factor of the sintered sample were 1470 and 0.006 at 1OkHz, respectively, measured by a HP4192A Impedance.

关 键 词：钛酸锶钡 柠檬酸-硝酸盐燃烧法 介电性质 

分 类 号：TN304[电子电信—物理电子学]