Microstructure and dielectric properties of PMN-PT ceramics prepared by the molten salts method

被引：25

作者：

Zhao, Shixi ^{[1
]}

Li, Qiang ^{[2
]}

Feng, Yuchuan ^{[1
]}

Nan, Cewen ^{[3
]}

机构：

[1] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China

[2] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[3] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2009年 / 70卷 / 3-4期

关键词：

PMN-PT ceramics; Molten salts synthesis; Sintering characteristic; Dielectric and piezoelectric properties; LEAD-MAGNESIUM NIOBATE; RELAXOR FERROELECTRICS; FABRICATION; ACTUATOR; PBO;

D O I：

10.1016/j.jpcs.2009.01.009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The sintering characteristic and dielectric properties of 0.67PMN-0.33PT ceramics prepared by the molten salt synthesis (MSS) method were investigated. PMN-PT particles synthesized by MSS with smaller grain size and good dispersion could lower the sintering temperature of ceramics; PMN-PT ceramics with relative density above 96% could be obtained in the range 1150-1180 degrees C. The molten salts species could significantly affect the microstructure and proper-ties of MPN-PT ceramics. In the range 1100-1200 degrees C, PMN-PT ceramics from the sulfate flux MSS powders showed intergranular fracture, but that from the chloride flux MSS powder showed transgranular fracture. At the same sintering condition, the properties of PMN-PT ceramics from the powders prepared in the chloride flux are better than that from the powders prepared in the sulfate flux, their maximum dielectric constant epsilon(max)approximate to 29,385 and piezoelectric constant d(33)approximate to 660 pC/N. The above results demonstrated that PMN-PT ceramics prepared by the molten salts method possessed excellent piezoelectric and dielectric properties. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：639 / 644

页数：6

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