Fabrication of submicron La2O3-coated BaTiO3 particles and fine-grained ceramics with temperature-stable dielectric properties

La2O3-coated BaTiO3 core–shell submicron particles are synthesized using chemical methods. The effects of the La2O3 coating characteristics, adjusted through pH control, on the microstructure and dielectric properties of the resulting composite BaTiO3 multilayer-capacitor ceramics are studied, and c...

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Bibliographic Details
Published in:Scripta materialia 2014-11, Vol.90-91, p.49-52
Main Authors: Wang, Yan, Cui, Bin, Liu, Yu, Zhao, Xiaotong, Hu, Zhenyu, Yan, Qiangqiang, Wu, Tong, Zhao, Lili, Wang, Yaoyu
Format: Article
Language:English
Subjects:
Barium titanates
Ceramics
Chemical coating method
Core–shell structure
Dielectric constant
Dielectric loss
Dielectric properties
Dielectrics
Microstructure
Particulate composites
Permittivity
Transmission electron microscopy (TEM)
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Summary:La2O3-coated BaTiO3 core–shell submicron particles are synthesized using chemical methods. The effects of the La2O3 coating characteristics, adjusted through pH control, on the microstructure and dielectric properties of the resulting composite BaTiO3 multilayer-capacitor ceramics are studied, and compared with bulk BaTiO3 and Ba0.97La0.02TiO3 ceramics. We obtained fine-grained ceramics with temperature-stable dielectric properties, a maximum permittivity of 2902 and a dielectric loss of less than 0.6% at room temperature.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.07.014