溶胶-凝胶法制备硼硅玻璃掺杂BST陶瓷的研究  

Preparation of Barium Strontium Titanate Ceramics Doped Si-B-O Glass by Sol-Gel Method

作　　者：王疆瑛[1] 吴宇平[2] 

机构地区：[1]中国计量学院材料科学与工学院,浙江杭州310018 [2]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《压电与声光》2010年第1期93-96,共4页Piezoelectrics & Acoustooptics

基　　金：浙江省教育厅基金资助项目(20050397);中国计量学院自然科学基金资助项目(2006ZD05)

摘　　要：研究了Si-B-O系玻璃掺杂对钛酸锶钡(BST)陶瓷的相结构和介电性能的影响。实验结果表明,当x(SiO_2)>10%时,Si-B-O系玻璃掺杂BST陶瓷易出现杂相,即Ba_2TiSi_2O_8相。x(SiO_2)≤10%,Si-B-O系玻璃掺杂BST陶瓷粉体的相结构为立方钙钛矿相结构,其合成温度大于等于600℃,不存在第二相。Si-B-O系玻璃掺杂BST陶瓷的烧结温度低于传统工艺。Si-B-O系玻璃掺杂BST陶瓷的显微结构呈细晶结构(晶粒尺寸<1μm)。随玻璃含量的增加,Si-B-O系玻璃掺杂BST陶瓷介电常数ε降低,介电峰变低,平坦,峰形宽化,介电损耗降低,居里温度T_C向低温移动。The effect of Si＋B-O glass doping on the phase structure and dielectric properties of barium strontium titanate （BST） ceramics were researched. Experimental results showed that the diffraction peaks of secondary phase （Ba2 TiSi2O8 ） occur, with the Si-B-O glass content〉-10 %. With contents of SiO2 ≤10 %, BST ceramic doped Si-B-O glass powders showed typical XRD patterns of perovskite polycrystalline structure formed at 600 ℃ and no secondary phase was detected. The ceramic doped Si-B-O glass samples were sintered at lower temperatures compared with the conventional barium strontium titanate ceramics. Much smaller sized grains are obtained in the BST ceramic doped Si-B-O glass samples. The dielectric permittivity and dielectric dissipation of BST ceramic doped Si-B-O glass samples generally decreased with the invrease of the amounts of Si-B-O glass. With the decreasing of grain size, the dielectric peaks of BST ceramic doped Si-B-O glass samples become lower and broader.

关 键 词：钛酸锶钡 Si—B-O 溶胶-凝胶工艺 玻璃 介电性能 

分 类 号：TN304[电子电信—物理电子学]