溶胶—凝胶法制备PCT铁电陶瓷

Ferroelectric Ceramics of (Pa,Ca)Tio_3 Prepared by Sol-Gel Process

本文报导了通过溶胶—凝胶法制备Ｐｂ_（１－ｘ）ＣａｘＴｉＯ_３（ｘ＝０．１～０．３）铁电陶瓷原料粉末，所得粉末具有较高的活性、纯度和均匀度。研究了不同掺ＣａＯ量对晶体结构和烧结温度的影响。在ＰＣＴ晶相生成前未发现有烧绿石或其它过渡晶相的出现。使用该粉末通过１０００～１２００℃的烧结过程，所得ＰＣＴ陶瓷可达理论密度的８８～９４％。

Ferroelectric Ceramic Powders of Pb_(1-x)CaxTiO_3 ( x=0.1￣0.3)with high reactivity, purity and homogeneity was prepared through Sol-gel process. Tae effect of different CaO Content on the crystal structure and sintering temperature has been studied. The pyrochlore-type and other intermediate crystal phases were not observed before the formation of PCT crystal phase. PCT ferroelectric ceramics can be sintered at 1000￣1200℃ with this powder. The obtained PCT ceramics could reach 88￣94% theoretical density.