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Dielectric Properties and Impedance of BaTiO3@Ag Core-shell Composite Ceramic
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Cuiying MA, Huiling DU, Jia LIU, Xian DU, Ke YU, Xueyan XI, Hongpei RAN
Journal of the Chinese Ceramic Society | 2020, 48(9) : 1405 - 1413
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Journal of the Chinese Ceramic Society | 2020, 48(9): 1405-1413
Dielectric Properties and Impedance of BaTiO3@Ag Core-shell Composite Ceramic
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Cuiying MA, Huiling DU, Jia LIU, Xian DU, Ke YU, Xueyan XI, Hongpei RAN
Affiliations
  • College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

    • MA Cuiying (1984-), female, Doctoral candidate. E-mail:

About Author:

MA Cuiying (1984-), female, Doctoral candidate. E-mail:

Published: 2020-09-20 doi: 10.14062/j.issn.0454-5648.20200181
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Silver (Ag) was coated on the surface of nano-sized BaTiO3 powder by a chemical coating method, and BaTiO3@Ag composite ceramic was prepared by a solid-state method. The effect of Ag content on the composition, fracture surface microstructure, dielectric properties, and impedance spectroscopy of ceramics were investigated. The results indicate that BaTiO3@Ag composite ceramic is a core-shell structure, and the main phase is a pure perovskite phase. BaTiO3@Ag composite ceramic contains fine and homogeneous grains. The dielectric constant and loss decrease with increasing of Ag content and the δmin is 0.004 87. The curie peaks widen, and the diffusion factor γ increases from 1.08 to 1.42. The thermal stability is improved due to the Ag introduction. The temperature stability coefficient decreases from 0.194 0 to 0.004 8. In addition, the dielectric relaxation of BaTiO3@Ag composite ceramic occurs at 200 ℃. The conductance activation energy and relaxation activation energy determined by impedance spectroscopy show that the relaxation phenomena occurs due to the short jump of the defective dipoles, which are formed by the conducting electrons generated from the double ionization of the oxygen vacancy and the surrounding ions.

chemical coating method  /  barium titanate  /  core-shell structure  /  dielectric properties  /  dielectric relaxation
马翠英, 杜慧玲, 刘佳, 杜娴, 袁科, 郗雪艳, 冉宏培. 核-壳结构BaTiO3@Ag复合陶瓷的介电性能及阻抗谱. 硅酸盐学报, 2020 , 48 (9) : 1405 -1413 . DOI: 10.14062/j.issn.0454-5648.20200181
Cuiying MA, Huiling DU, Jia LIU, Xian DU, Ke YU, Xueyan XI, Hongpei RAN. Dielectric Properties and Impedance of BaTiO3@Ag Core-shell Composite Ceramic[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (9) : 1405 -1413 . DOI: 10.14062/j.issn.0454-5648.20200181
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Year 2020 volume 48 Issue 9
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Article Info
doi: 10.14062/j.issn.0454-5648.20200181
  • Receive Date：2020-03-17
  • Online Date：2026-10-29
  • Published：2020-09-20
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History
  • Received：2020-03-17
  • Revised：2020-04-08
Funding
Affiliations
    College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

Corresponding:

DU Huiling (1972-), female, Professor. E-mail:
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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