Properties of the Pb(Mg1/3Nb2/3)O3 Ceramics Prepared by Using Two Different Mg Precursors

被引：4

作者：

Mitoseriu, L. ^{[1
]}

Ianculescu, A. ^{[2
]}

Carnasciali, M. M. ^{[3
]}

Brileanu, A. ^{[4
]}

Curecheriu, L. ^{[1
]}

机构：

[1] Alexandru Ioan Cuza Univ, Dept Solid State & Theoret Phys, Iasi 700506, Romania

[2] Univ Politehn Bucuresti, Bucharest 011061, Romania

[3] Univ Genoa, Dept Chem & Ind Chem, I-16146 Genoa, Italy

[4] Ilie Murgulescu Romanian Acad, Inst Phys Chem, Bucharest 060021, Romania

来源：

FERROELECTRICS | 2008年 / 369卷

关键词：

PbMg1; 3Nb2; 3iO3; columbite route; relaxor; dielectric properties; perovskite;

D O I：

10.1080/00150190802377967

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pb(Mg1/3Nb2/3)O3 ceramics prepared via columbite method by using two types of Mg precursors, i.e. MgO and (MgCO3)4Mg(OH)24H2O exhibit high crystallinity and high densification after sintering at 1200C. Higher amounts of pyrochlore phases were detected in the PMN sample obtained by using (MgCO3)4 Mg(OH)2.4H2O as precursor. This compositional difference, determines, for all frequencies, a shift of 50 K of the temperature corresponding to the permittivity maximum Tm for the sample derived from (MgCO3)4Mg(OH)24H2O. From this reason, better dielectric properties were obtained at room temperature for this PMN sample, although a higher dielectric permittivity at Tm was obtained for the sample derived from MgO precursor.

引用

页码：157 / 169

页数：13

共 23 条

[1] Recent progress in relaxor ferroelectrics with perovskite structure [J].