聚合物前驱体法制备ZnTiO_3粉体的影响因素

STUDY OF FACTORS AFFECTING PREPARATION OF ZnTiO_3 POWDERS VIA POLYMERIC PRECURSOR METHOD

聚合物前驱体法已成为制备微波介质陶瓷重要方法之一。本文以制备ZnTiO3粉体为例,系统地研究了pH值,乙二醇与柠檬酸的摩尔比和柠檬酸与金属离子的摩尔比对ZnTiO3晶相的形成过程和显微结构的影响。pH值5～6之间时,能形成淡黄色透明溶胶;乙二醇与柠檬酸的摩尔比为2时,前驱体树脂为多孔的海绵状;柠檬酸与金属离子的摩尔比为2,前驱体合成的ZnTiO3粉体最佳。

Polymeric Precursor Method has become an important method for the preparation of microwave dielectric ceramics. In this paper, ZnTiO3 powders have been prepared as examples, and then the effects of the pH value, the molar ratio of EG to CA, and the molar ratio of CA to metallic ion on the synthesis of ZnTiO3 crystalloid have been investigated. When the pH of the solvent is 5-6, a light yellow gel was obtained; when the molar ration of EG to CA is 2, the precursor resin is porous sponge; when the molar ration of CA to metallic ion is 2, the quality of the ZnTiO3 powders prepared from the precursor is optimized.