Influence of Synthesis-Related Microstructural Features on the Electrocaloric Effect for 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 Ceramics

被引：6

作者：

Ursic, Hana ^{[1
,2
]}

Vrabelj, Marko ^{[1
,2
]}

Otonicar, Mojca ^{[1
,2
]}

Fulanovic, Lovro ^{[1
,2
,3
]}

Rozic, Brigita ^{[1
,2
]}

Kutnjak, Zdravko ^{[1
,2
]}

Bobnar, Vid ^{[1
,2
]}

Malic, Barbara ^{[1
,2
]}

机构：

[1] Jozef Stefan Inst, Jamova Cesta 39, Ljubljana 1000, Slovenia

[2] Jozef Stefan Int Postgrad Sch, Jamova Cesta 39, Ljubljana 1000, Slovenia

[3] Tech Univ Darmstadt, Dept Mat & Earth Sci, Nonmetall Inorgan Mat, D-64287 Darmstadt, Germany

来源：

CRYSTALS | 2021年 / 11卷 / 04期

关键词：

PMN-PT; mechanochemical synthesis; columbite synthesis; electrocaloric effect; electric breakdown field; microstructure; ENERGY-STORAGE DENSITY; DIELECTRIC-PROPERTIES; GRAIN-SIZE; MECHANO-SYNTHESIS; BREAKDOWN; DEPENDENCE; TEMPERATURE; SOFT;

D O I：

10.3390/cryst11040372

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Despite having a very similar electrocaloric (EC) coefficient, i.e., the EC temperature change divided by the applied electric field, the 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) (PMN-10PT) ceramic prepared by mechanochemical synthesis exhibits a much higher EC temperature change than the columbite-derived version, i.e., 2.37 degrees C at 107 degrees C and 115 kV/cm. The difference is due to the almost two-times-higher breakdown field of the former material, 115 kV/cm, as opposed to 57 kV/cm in the latter. While both ceramic materials have similarly high relative densities and grain sizes (>96%, approximate to 5 mu m) and an almost correct perovskite stoichiometry, the mechanochemical synthesis contributes to a lower level of compositional deviation. The peak permittivity and saturated polarization are slightly higher and the domain structure is finer in the mechanochemically derived ceramic. The secondary phases that result from each synthesis are identified and related to different interactions of the individual materials with the electric field: an intergranular lead-silicate-based phase in the columbite-derived PMN-10PT and MgO inclusions in the mechanochemically derived ceramic.

引用

页数：12

共 53 条

[1] Processing by mechano synthesis and properties of piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 with different compositions [J].