Electrical properties of 0.98(K0.5Na0.5)NbO3-0.02AETiO3 piezoceramics doped with Li2CO3

被引：2

作者：

Chen, Hong ^{[1
]}

Liu, Peng ^{[2
]}

机构：

[1] Engn Univ PAP, Coll Mil Basic Educ, Xian, Peoples R China

[2] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian, Peoples R China

来源：

FERROELECTRICS | 2019年 / 551卷 / 01期

关键词：

Powders solid state reaction; piezoelectric properties; perovskites; PIEZOELECTRIC PROPERTIES; CERAMICS;

D O I：

10.1080/00150193.2019.1658029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ceramics with chemical compositions of 0.98(K0.5Na0.5)NbO3-0.02AETiO(3) doped with 1.0 wt.% Li2CO3 (NKN-AET-Li, AE = Mg, Ca, Sr and Ba) were prepared by a convention ceramic processing. The crystal structures, microstructure and electrical properties of all ceramics were investigated. The results show that all the samples possess a perovskite structure. It was found that the orthorhombic to tetragonal polymorphic phase transition (PPT) temperature (TO-T) shifted to near room temperature while maintaining a high Curie temperature T-c(>= 400 degrees C) for NKN-CaT-Li and NKN-SrT-Li ceramics with high relative density (>96%). Piezoelectric values of NKN-CaT-Li and NKN-SrT-Li ceramics were found to be d(33) = 197 pC/N and d(33) = 243 pC/N; k(p) = 0.32 and k(p) = 0.34) near room temperature. The NKN-SrT-Li and NKN-CaT-Li ceramics showed good temperature stability of dielectric and piezoelectric properties within a temperature range of 50-200 degrees C.

引用

页码：53 / 59

页数：7

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