用凝胶注模成型制备压电陶瓷体及其电学性能研究  

Processing and Electrical Properties of Piezoelectric Ceramics Formed by Gelcasting

作　　者：郭栋[1] 蔡锴[1] 李龙土[1] 南策文[1] 桂治轮[1] 

机构地区：[1]清华大学材料系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《无机材料学报》2003年第5期1045-1050,共6页Journal of Inorganic Materials

摘　　要：对PZT陶瓷浆料胶体化学特性进行了研究,成功制备了高固相含量低粘度的PZT陶瓷浆料.对含不同分散剂凝胶注模成型PZT样品电学性能的研究及其与普通干压法制备样品的比较表明,成型过程中的各种有机添加剂如单体和交联剂等不会对PZT的性能造成影响,而某些无机成份如选择不当的分散剂,则会起到一种掺杂剂的作用,从而影响成型后样品的各种电学性能.本文结果说明,对于电子陶瓷材料,在应用凝胶注模这种成型方法时。In this article the colloidal chemistry of PZT powders in aqueous solution, the rheological behaviors of the PZT suspension and the influence of dispersants on the rheology of the suspension and on the electrical properties of the gelcast PZT samples were investigated in comparison with those of die pressed ones. The results show that because the electrical properties of PZT are very sensitive to their composition, unsuitably selected dispersants can result in the deterioration of the electric properties of the material although concentrated PZT slurry with low viscosity can be obtained by different dispersants. The results also indicate that the influence of the additives on the properties of the samples should be considered when gelcasting is applied to the forming of electronic ceramics.

关 键 词：压电陶瓷 凝胶注模成型 电学性能 

分 类 号：TN304[电子电信—物理电子学]