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Effect of Co2+ Substitution on Microwave Dielectric Properties of Ca5Mg4-xCox(VO4)6 Ceramics
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Wei LIU1, Hansheng LENG1, Bo LI1, 2, 3
Journal of the Chinese Ceramic Society | 2021, 49(3) : 441 - 447
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Journal of the Chinese Ceramic Society | 2021, 49(3): 441-447
Effect of Co2+ Substitution on Microwave Dielectric Properties of Ca5Mg4-xCox(VO4)6 Ceramics
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Wei LIU1, Hansheng LENG1, Bo LI1, 2, 3
Affiliations
  • 1.School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 2.State Key Laboratory of Electronic Thin Films and Integrated Devices, Chengdu 610054, China
  • 3.National Engineering Research Center of Electromagnetic Radiation Control Materials, Chengdu 610054, China

    • LIU Wei (1994-), male, Master candidate. E-mail:

About Author:

LIU Wei (1994-), male, Master candidate. E-mail:

Published: 2021-03-20 doi: 10.14062/j.issn.0454-5648.20200430
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Ca5Mg4(VO4)6 microwave dielectric ceramic was prepared by a solid-phase reaction method. Mg element in Ca5Mg4(VO4)6 ceramic was substituted by Co element in order to improve the microwave dielectric properties. The phase composition and microscopic morphology of the ceramics were determined by X-ray diffraction and scanning electron microscopy. Also, the internal laws of the microwave dielectric properties were analyzed via theoretical calculations, such as bond energy. The formation of solid solution after Co substitutioncan decrease the sintering temperature. The density dominates the change of εr at a higher relative density. However, εr is mainly affected by the ion polarizability per unit volume at a lower relative density. The grain size reduction caused by the substitution is beneficial to the promotion of the Q×f value. τf is closely related to the bond energy and changes with the bond energy of the V—O, which is the maximum bond energy in ceramics. Ca5Mg3Co(VO4)6 ceramic has the optimum microwave dielectric properties (i.e., εr=9.65, Q×f=54 685 GHz, and τf = -55.3×10-6℃-1).

microwave dielectric ceramics  /  calcium magnesium vanadate  /  ions substitution  /  dielectic property
刘伟, 冷寒生, 李波. 钴离子取代对Ca5Mg4-xCox(VO4)6陶瓷微波介电性能的影响. 硅酸盐学报, 2021 , 49 (3) : 441 -447 . DOI: 10.14062/j.issn.0454-5648.20200430
Wei LIU, Hansheng LENG, Bo LI. Effect of Co2+ Substitution on Microwave Dielectric Properties of Ca5Mg4-xCox(VO4)6 Ceramics[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (3) : 441 -447 . DOI: 10.14062/j.issn.0454-5648.20200430
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Year 2021 volume 49 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20200430
  • Receive Date：2020-06-17
  • Online Date：2026-10-30
  • Published：2021-03-20
Article Data
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History
  • Received：2020-06-17
  • Revised：2020-07-30
Affiliations
    1.School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
    2.State Key Laboratory of Electronic Thin Films and Integrated Devices, Chengdu 610054, China
    3.National Engineering Research Center of Electromagnetic Radiation Control Materials, Chengdu 610054, China

Corresponding:

LI Bo (1980-), male, Ph.D., Professor. E-mail:
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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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