High dielectric tunability of Ba(Zr0.2Ti0.8)O3-(Ba0.7Ca0.3)TiO3 thick films modified by a solution-immersion process

Authors

Zuyong Feng, Guangdong University of TechnologyFollow
Nan Wu, Guangdong University of Technology
Wei Zhang, Guangdong University of Technology
Jie Luo, Guangdong University of Technology
Xingui Tang, Guangdong University
Zhenxiang Cheng, University of WollongongFollow
Dongqi Shi, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

105136

Publication Details

Feng, Z., Wu, N., Zhang, W., Luo, J., Tang, X., Cheng, Z., Shi, D. & Dou, S. (2016). High dielectric tunability of Ba(Zr0.2Ti0.8)O3-(Ba0.7Ca0.3)TiO3 thick films modified by a solution-immersion process. Materials Research Bulletin, 76 384-388.

Abstract

High-quality lead-free 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 thick films with the thickness of 8 μm were prepared by screen printing with a solution-immersion process. The solution-modified films near the morphotropic phase boundary (MPB) showed very dense and homogenous microstructure with large grain size, and exhibited moderate dielectric constant of 1680 and low dielectric loss of 1.38% at 10 kHz with 0 V bias at room temperature. High dielectric tunability up to 76.7% at 12 kV/mm and 10 kHz was achieved in the modified films. The excellent dielectric properties associated with good microstructure and MPB composition, make the lead-free films be a promising candidate for dielectric tunable capacitor applications.