Sintering and piezoelectric properties of Pb(Ni$\_1/3$Sb$\_2/3$)O$\_3$-PbZrO$\_3$-PbTiO$\_3$ ceramics

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• 作者：Wang ; Moo Chin ; Huang ; Mao Sung ; Wong ; Tze Sheong ; Wu ; Nan Chung
• 刊名：Journal of Materials Science
• 出版时间：2002
• 出版年：2002
• 期刊代码：24_00222461
• 类别：mat
• 卷：37
• 期：3
• 页码：663-668
• 数据来源：sp

摘要

The sintering and piezoelectric properties of Pb(Ni$\_1/3$Sb$\_2/3$)O$\_3$-PbZrO$\_3$-PbTiO$\_3$ ceramics have been investigated. When the powders contain 48 mol% PbTiO$\_3$ and less than 10 mol% Pb(Ni$\_1/3$Sb$\_2/3$)O$\_3$ followed by calcination at 850°C for 2 h, the calcine only contains the perovskite structure; but if the Pb(Ni$\_1/3$Sb$\_2/3$)O$\_3$ content is between 12 mol% and 14 mol%, both tetragonal and rhombohedral phases are obtained. The composition of the morphotropic phase boundary(MPB) in the Pb(Ni$\_1/3$Sb$\_2/3$)O$\_3$-PbZrO$\_3$-PbTiO$\_3$ system is Pb(Ni$\_1/3$Sb$\_2/3$)O$\_3$ = 12 mol%, PbZrO$\_3$ = 40 mol% and PbTiO$\_3$ = 48 mol%. As the composition at the MPB is sintered at 1260°C and 1280°C for 2 h, respectively, the maximum density (7.8 g/cm$^3$) is obtained. The SEM micrographs indicate that a decrease in porosity with increasing sintering temperature is attained at 1280°C, which is due to a decrease in the number and size of pores. When the sintering temperature is higher than 1280°C, the porosity increases due to PbO evaporation leading to an increase of the number of pore sites and in enlargement of the pore diameter. When the compact composition at MPB is sintered at 1280°C for 2 h, the planar coupling coefficient (K$\_p$) and mechanical quality coefficient (Q$\_m$) tend to approach the maximum (0.488) and minimum values (292.5), respectively.