摘要
钙钛矿型PbTiO_3是铁磁性材料,具有高居里温度,低介电常数和明显的各向异性参数,是一种有应用前景的复合材料成分。现已报道的制备方法有:混合氧化物法,溶胶-凝胶法,水热法和化学共沉法等。共沉法大多用TiCl_4、Pb(NO_3)_2等水溶性物质为原料,以水为溶剂,故成本低,便于使用稀溶液。但是,TiCl_4易水解,难以准确配制溶液,操作条件较繁琐,给制备粒径小、纯度高的微粉带来一定困难。为此,我们对化学共沉法做了改进,不用TiCl_4。
The pure perovskite-lead titanate powders were prepared by coprecipitation method. The ethanol solution of the Ti(OC_4H_9)_4 and methanol solution of the PbAc_2 were mixed at a 1:1 molar ratio of Pb to Ti. Under intensive stiring the mixed solution was added dropwise to the water followed by adding H_2O_2 solution. The pH of the solution was adjusted to 8.9～9.2. by adding NH_4OH. The resulted precipitate was washed with deionized water and then dried at 100℃. The dried material was pestled and calcined at temperature above 550℃ to yield PbTiO_3 powders.
出处
《应用化学》
CAS
CSCD
北大核心
1993年第2期99-101,共3页
Chinese Journal of Applied Chemistry
基金
国家高技术研究项目
