BaO-La_2O_3-TiO_2纳米粉体制备及介电性能研究  

The Preparation and Dielectric Properties of BaO-La_2O_3-TiO_2 Nano Particles Obtained by Sol-Gel Process

作　　者：高伟[1] 李华[1] 谢道华[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《压电与声光》2006年第3期331-334,共4页Piezoelectrics & Acoustooptics

基　　金：国家"八六三"计划基金资助项目(001AA325110);天津市自然科学基金资助项目(013601511)

摘　　要：采用醇盐水解溶胶-凝胶法成功制备出分散性良好的BaO-La2O3-TiO2(BLT)系纳米粉体材料,其平均粒径约为30 nm。X-射线(XRD)分析表明,用此类粉体烧制的陶瓷材料其主晶相为La2Ti2O7,副相为Ba-La2Ti4O12。该粉体烧结成瓷后表现出良好的介电性能。In present paper, the homogeneous dispersive nano powders of BaO-La2O3-TiO2 （BLT） were prepared by Sol-Gel process with tetrabutyl titanate, barium acetate and lanthanum nitrate. The average size of particle is about 30 nm. Through X-ray diffraction analysis , the ceramic material obtained by the sintered nano powders has the chief crystal phrase of La2Ti2O7, and the second chief one of BaLa2Ti4O12. The ceramic sintered with the powders shows an good dielectric performance.

关 键 词：溶胶-凝胶法 纳米粉体 微波陶瓷 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]