Structural And Electrical Properties Of Electrophoretically Deposited Knn And Pzt Thick Films
KNN, (K0.5Na0.5)NbO3 powder was synthesized from raw materials, and the PZT powder was prepared from commercial PZT powder (Alpha ceramics, Inc.). After a ball milling process, each KNN and PZT powder was uniformly deposited on Pt coated alumina plates up to 200μm and 230μm thick films, respectively. Several chemical additives such as PEI dispersant, PVB as polymer binder, glacial acetic acid and tetrumethyl ammonium hydroxide were varied to investigate their roles in the sintering process and the stability of chemical solution for electrophoretic deposition. The effect of additives on the sintering was not significant, but the stability of the solution and uniformity were strongly influenced by additives. Deposited films were sintered ranging from 850℃ to 1100℃. The densest film was obtained at a sintering temperature of 1050℃. Excess addition of raw material K2CO3 could eliminate secondary phases in KNN thick films after sintering. Electrical properties of thick films were investigated by characterizing the ferroelectric hysteresis loops, dielectric properties, and piezoelectric properties.
Hosang Ahn Jung-Hyun Park Seon-Bae Kim Dong-Joo Kim
Materials Research and Education Center,Auburn University,Auburn AL 36849,USA
国际会议
西安
英文
225-227
2009-08-23（万方平台首次上网日期，不代表论文的发表时间）