Preparation of 0.9PMN-0.1PT ceramics by sol-gel process

Abstract

The preparation of 0.9PMN-0.1PT ceramics by the metal alkoxide method and the effect of excess Mg(OC2H5)2,Pb(CH3COO)2 H 2O are reported. The excess Mg(OC2H5)2 addition signficantly afects the rate of perovskite phase forma-tion in 0.9PMN-0.1PT ceramics. The sample by addition of 5 wt% excess Mg(OC2H5)2 sintered at 1150oC for 1 hr obtainedperovskite single phase and showed 98 % of the theoretical density. The dielectric constant of the pelets sintered at 1150oCwas increased by the adition of 5 wt% exces Mg(OC2H5)2 and had a maximum value of 15000 at 1 kHz.Key words 0.9PMN-0.1PT ceramics, Metal alkoxide method, Perovskite, Dielectric constant. -... .. 0.9PMN-0.1PT .... ...... .... ........ ...... , .. , 520-714(2000. 10. 24. .. )