应用草酸盐共沉淀法制备（Sr，Pb）TiO3超细粉体，分析了共沉淀产物的热分解过程，确定了晶化温度和煅烧条件，同时，测量了粉末的晶粒尺寸，标定了材料的晶体结构，试验了粉体的烧结条件．结果表明，用草酸盐共沉淀法制备陶瓷粉末，合成温度远远低于传统的固相反应合成法，陶瓷粉末晶粒微细、均匀、烧结温度低；在（Sr，Ph）TiO3陶瓷中观测到了小尺寸微晶粒的结构奇异现象，即当粉末微粒尺寸很小时，晶体结构不是通常的四方铁电相结构，而是立方顺电相结构．
The (Sr, Pb)TiO3 ultrafine particles were prepared by oxalate-coprecipitation process, the thermolysisprocess of the coprecipitates (Sr, Pb)TiO(C2O4)2 .4H2O was analyzed and the crystallization temperatureand calcination comdition were defined. The averagc Primary particle size calcined at differenttemperaturcs, the crystal structurcs of sintered body and powders calcilled at different temperatures and thesintering condition of powders were also determined. The results show that the synthetic temperature of ceramic powder prepared by this process is much lower than by the conventional solid reaction process. the ceramic powder obtained is ultrafine and uniform, and the sintering temperature is lower. Exotic structure with fine grain was observed, that is, when the particle size is very small, the crystal structure is not the normal tetragonal ferroelectric structure but cubic paraelectric.
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