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Paper
Title

Effect of morphology and nonbounded interface on dielectric properties of plasma sprayed BaTiO۳ Coating

فصلنامه مواد پیشرفته و فرآوری، دوره: 2، شماره: 4
Year: 1393
COI: JR_JMATPR-2-4_003
Language: EnglishView: 114
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Authors

Amirhossein Pakseresht - Department of Ceramics, Materials and Energy Research Center, karaj, Iran.
Mohamadreza Rahimipour - Department of Ceramics, Materials and Energy Research Center, karaj, Iran.
Mohamadreza Vaezi - Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, karaj, Iran
Mehdi Salehi - Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.

Abstract:

In this research, BaTiO۳ thick deposit has been successfully sprayed by air plasma spray. The microstructure and dielectric properties of thick films were investigated by secondary electron microscopy (SEM) and LCR meter respectively. XRD measurement was carried out on plasma sprayed BaTiO۳. The results illustrate differences in the crystal structure between plasma sprayed coatings and feed stock powders. The as deposited films were mainly crystalline with small amount of an amorphous second phase. The amount of crystalline to amorphous phases was found to be critically dependent upon the degree of melting of feed stock powders. The as-deposited BaTiO۳ films had maximum dielectric constant as high as ۸۵ at room temperature. Upon annealing in air at ۱۰۵۰ oC, the dielectric constant increased to۱۶۵. Increasing in dielectric constant was attributed to the crystallization of the amorphous phase. The dielectric constant of BaTiO۳ thick films produced by plasma spray was lower than that of sintering ceramic. Reduction in dielectric properties of deposited films was related to splats interface and lamellar structure of plasma sprayed coatings.

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This Paper COI Code is JR_JMATPR-2-4_003. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1282696/

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Pakseresht, Amirhossein and Rahimipour, Mohamadreza and Vaezi, Mohamadreza and Salehi, Mehdi,1393,Effect of morphology and nonbounded interface on dielectric properties of plasma sprayed BaTiO۳ Coating,https://civilica.com/doc/1282696

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