The variation of phase transition behavior on substituting Pb2+ and Sr2+ for a site cations in (Na1/2Bi1/2)TiO3 system

被引：8

作者：

Cho, SY ^{[1
]}

Park, SE ^{[1
]}

Hong, KS ^{[1
]}

机构：

[1] UNIV PENN,MAT RES LAB,PHILADELPHIA,PA 19104

来源：

FERROELECTRICS | 1997年 / 195卷 / 1-4期

关键词：

D O I：

10.1080/00150199708260480

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase transition behavior in (Na1/2Bi1/2)(1-x)PbxTiO3 [NBPT(x)] and (Na1/2Bi1/2)(1-x)SrxTiO3[NBST(x)] with respect to changes in composition and temperature was investigated using X-ray analysis and dielectric characterization. Morphotropic phase boundary(MPB) are located in the composition range of 0.13<x<0.15 and 0.25<x<0.26 in NBPT(x) and NBST(x), respectively. The phase transition exhibited more Ist order behavior and the dielectric loss could be suppressed at high temperatures with the increase of Pb2+ substitutions. NBST(x) showed diffuse phase transition and the degree of the shift in permittivity peak with the measuring frequency increased with the increase of SrTiO3 content. This increase was correlated with the symmetry at room temperature and decrease of the temperature of maximum permittivity.

引用

页码：27 / 30

页数：4

共 6 条

[1]

ISUPOV VA, 1964, SOV PHYS-SOL STATE, V6, P615

[2] NONSTOICHIOMETRY AND THE LONG-RANGE CATION ORDERING IN CRYSTALS OF (NA1/2BI1/2)TIO3 [J].