Structural, dielectric, electrocaloric and energy storage properties of lead free Ba0.975La0.017(ZrxTi0.95-x)Sn0.05O3 (x=0.05; 0.20) ceramics

被引：29

作者：

Smail, Sihem ^{[1
]}

Benyoussef, Manal ^{[2
]}

Taibi, Kamel ^{[1
]}

Bensemma, Nouar ^{[3
]}

Manoun, Bouchaib ^{[4
,5
]}

El Marssi, Mimoun ^{[2
]}

Lahmar, Abdelilah ^{[2
]}

机构：

[1] USTHB, Fac Chim, Lab Cristallog Thermodynam, BP32, Al Alia 16111, Alger, Algeria

[2] Univ Picardie Jules Verne, Lab Phys Matiere Condensee LPMC, 33 Rue St Leu, F-80039 Amiens 1, France

[3] Ctr Rech Nucl Birine, Djelfa, Algeria

[4] Hassan First Univ Settat, FST, S3M, Rayonnement Matiere & Instrumentat, Settat 26000, Morocco

[5] Univ Mohammed VI Polytech, Mat Sci & Nanoengn Dept, Ben Guerir, Morocco

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2020年 / 252卷

基金：

欧盟地平线“2020”;

关键词：

BZT-Based ceramics; Dielectric investigations; Energy storage; Electrocaloric effect; PHASE-TRANSITION; RELAXOR FERROELECTRICS; DIFFRACTION; LA; MICROSTRUCTURE; TUNABILITY; BEHAVIOR; DENSITY;

D O I：

10.1016/j.matchemphys.2020.123462

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A-site deficient Ba0.975La0.0170.008(ZrxTi0.95-x)Sn0.05O3 (x = 0.05; 0.20) ceramics (BLaZ100xTS) were synthesized using the solid-state reaction. The microstructural study revealed a high density and low porosity in the studied ceramics. Besides, a grain size lower than 1.5 mu m was observed in the studied compounds, which is due to the incorporation of the rare earth element (lanthanum). X-ray diffraction and Raman studies revealed that BLaZ5TS and BLaZ20TS crystallize in a pemvskite-type structure with tetragonal and cubic symmetries, respectively. The dielectric study showed a normal ferroelectric-paraelectric phase transition for BLaZ5TS while a diffuse phase transition is noticed for BLaZ20TS sample. The energy-storage density and the associated energy efficiency were determined from the P-E loops versus temperature and the calculated values are comparable with the results obtained on BCZT systems. Furthermore, the adiabatic temperature change Delta T was calculated through the indirect method and a relatively high value of Delta T/Delta E = 0.2 10(-6) K m/V is obtained in BLaZ5TS compound. The simultaneous presence of energy storage property and electrocaloric responsivity makes this system a promising environmentally friendly candidate for application in electronic devices.

引用

页数：8

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