Title :
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
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(Zn1/2Ti1/2)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;
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
DOI :
10.1109/ISAF.2014.6923016
