Characteristics and dielectric properties of (Pb0.97−xLa0.02Bax)(Zr0.72Sn0.22Ti0.06)O3 ceramics

• Published in: Journal of alloys and compounds 2012-10, Vol.539, p.280-283
• Main Authors: Jinfei, Wang, Tongqing, Yang, Shengchen, Chen, Gang, Li, Xi, Yao
• Format: Article
• Language: English
• Subjects: Alloys; Antiferroelectric; Ba-doped; Ceramics; Change of temperature; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystal structure; Curie temperature; Dielectric constant; Dielectric properties; Dielectric properties of solids and liquids; Dielectrics; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Domain structure; hysteresis; Exact sciences and technology; Ferroelectricity and antiferroelectricity; Permittivity (dielectric function); Phase transformations; Physics; Pyroelectric and electrocaloric effects; Transforms
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2012.06.028

(Pb0.97−xLa0.02Bax)(Zr0.72Sn0.22Ti0.06)O3 (PLBZST) ceramics with x in the range of 0.09, 0.11, 0.13, 0.15 were fabricated by conventional solid-state reaction process, and their crystal structure, dielectric and electrocaloric effect were systemically investigated. The results showed that the ceramics with different Ba contents had a perovskite structure. Besides, it was found the ceramics transform gradually from antiferroelectric phase to paraelectric phase and the Curie temperature decreased with the increase of Ba content, when x=0.15, the Curie temperature of the ceramics decreased to ∼30°C near room temperature. The dielectric constant increased to about 12000 with increasing Ba contents. The change of temperature increased from 0.10 K to 0.25 K sharply at 2.2kV/mm.