Effects of sintering temperature on the microstructure and dielectric properties of BaZr0.2Ti0.8O3 ceramics. Issue 9 (November 2015)

• Record Type: Journal Article
• Authors: Sun, Zheng; Li, Lingxia; Zheng, Haoran; Yu, Shihui; Xu, Dan
• Is Part Of: Ceramics international. Volume 41:Issue 9(2015)Part B
• Page Start: 12158
• Page End: 12163
• Publication Date: 2015-11
• Subjects: C. Dielectric properties -- BaZr0.2Ti0.8O3 ceramics -- Diffuse phase transition -- Domain structure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.06.035
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: BaZr0.2 Ti0.8 O3 (short as BZT20) ceramics were prepared by a mixed-oxide method using a high-energy planetary ball mill and the effect of sintering temperature ( T s ) on their microstructure and dielectric properties was firstly investigated. A cubic perovskite structure free from any secondary peaks was observed for all sintered samples with ~95% theoretical density. The Curie temperature for all sintered samples varied near room temperature along with a change in the degree of diffuse phase transition. With the increase in T s, the average grain size increased from 25 μm to 70 μm, and the dielectric properties and tangent loss improved. The BZT20 ceramics sintered at 1350 °C exhibited permittivity of 20, 048 and tangent loss of 0.01. The influence of 90° and 180° domains on dielectric behavior of BZT20 ceramics was also investigated.