【摘要】 采用低温 -低压水热技术 ,在 15 0℃ ,0 .5MPa以下合成了一系列Ba1-xZnxTi1- yCeyO3固溶体纳米粉末 (0≤x≤ 0 .3,0≤y≤ 0 .3) ,XRD物相分析和d -间距 -组成图证明 ,产品为立方晶系的完全互溶取代固溶体 ,结果符合Vegard定律 .TEM形貌观察 ,粒子为均匀球形 ,平均粒径 70nm .通过制陶实验 ,分别测定了该系列固溶体的室温介电常数、介电损失以及介电常数随温度的变化 ,结果发现 ,通过低温 -低压液相反应在BaTiO3中掺入适量锌和铈 ,由于掺杂离子均匀进入母体晶格 ,引起tc 降低 ,室温介电常数达180 0 0以上 .纳米粉体的烧结温度为 12 0 0℃ ,比传统微米级粉体的烧结温度降低 15 0～ 2 0 0℃ .更多还原

【Abstract】 A series of Ba 1- x Zn x Ti 1- y Ce y O 3(0≤ x , y ≤0.3) solid solutions were synthesized by low -temperature/ low-pressure hydrothermal method below 150 ℃,0.5 MPa.XRD and cell parameters-component figures of the series of the solid solutions powder demonstrated that the compounds are mutually miscible in the solid solutions. Furthermore, there is conducted an observation through a TEM, the product is found to have a shape of uniform, substantially spherical particles with an average particle size of 70 nm in diameter. The results of preparing ceramics showed that after adulterating with Zn 2+ and Ce 4+ in pure BaTiO 3 phase, the dielectric constant increased ten times at room temperature.更多还原