A polymer-network gel coating method for BaTiO3-based dielectric ceramics with a multilayer core-shell structure

Author

Ting Wang ; Mengying Liu ; Hua Hao ; Zhonghua Ya ; Minghe Cao ; Hanxing Liu

Author_Institution

State Key Lab. of Adv. Technol. for Mater. Synthesis & Process., Wuhan Univ. of Technol., Wuhan, China

fYear

2014

fDate

12-16 May 2014

Firstpage

1

Lastpage

4

Abstract

A modified polymer-network gel route has been developed to prepare a multilayer core-shell structure of BaTiO₃-based dielectric ceramics, which greatly improved the efficiency of gelation process. The core particles are BaTiO₃, while 0.7 BaTiO₃-0.3Bi(Zn_1/2Ti_1/2)O₃ (0.7 BT-0.3BZT) and Nb oxides were coated in order as the shell material. The influences of core-shell structure and ratios on the dielectric properties were studied. The samples of coated BaTiO₃ were found to possess optimized temperature stability of dielectric behavior in the temperature range of -55 to 200°C (ΔC/C≤ ± 15%), the dielectric constant at room temperature could reach 1190, with a low dielectric loss at about 1.3%.

Keywords

barium compounds; ceramics; coatings; dielectric losses; multilayers; permittivity; polymer gels; BaTiO₃; core particles; dielectric ceramics; dielectric constant; dielectric loss; dielectric properties; gelation; multilayer core-shell structure; polymer-network gel coating method; temperature -55 degC to 200 degC; temperature stability; Capacitance; Ceramics; Coatings; Dielectric constant; Dielectric losses; Temperature; multilayer core-shell structure; polymer-network gel; temperature stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM), 2014 Joint IEEE International Symposium on the

Conference_Location

State College, PA

Type

conf

DOI

10.1109/ISAF.2014.6923016

Filename

6923016