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Microwave Dielectric Properties of LiBiW2O8 Ceramics with Low Sintering Temperature

Authors

  • Huanfu Zhou,

    Corresponding author
    1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China
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  • Xiuli Chen,

    1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China
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  • Liang Fang,

    1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China
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  • Xiaobin Liu,

    1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China
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  • Yiliang Wang

    1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004, China
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  • E. S. Kim—contributing editor

  • This work was supported by Natural Science Foundation of China (No. 50962004, and No. 50762002), Natural Science Foundation of Guangxi (No. 0832003Z and No. 0832001), and Program for NCET-06-0656, MOE, China.

†Author to whom correspondence should be addressed. e-mail: zhouhuanfu@163.com

Abstract

Preparation, phase structure, sintering behavior, and microwave dielectric properties of LiBiW2O8 ceramic have been investigated. The LiBiW2O8 ceramic can be well densified in the temperature range from 650° to 750°C for 2–8 h. X-ray diffraction data show that LiBiW2O8 ceramic has a monoclinic structure coupled with a second unknown phase. The LiBiW2O8 ceramic, sintered at 700°C for 2 h, exhibit microwave dielectric properties with permittivity of 26.5, Q×f of 16400 GHz, and temperature coefficient of resonant frequency (τf) of 70 ppm/°C. The addition of 30 mol% TiO2 to LiBiW2O8 also results in a ceramic composite exhibiting ɛr∼30.2, Q × f∼13 000 GHz and τf∼−9 ppm/oC. However, the reaction between LiBiW2O8 and Ag will affect its further application in low-temperature cofired ceramic.

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