한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제34권5호
  • /
  • Pages.342-347
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  • 2021
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Ba3V4O13-BaV2O6계 초저온 동시소성 세라믹스의 마이크로파 유전 특성

Microwave Dielectric Properties of Ultra-Low Temperature Co-firable Ba3V4O13-BaV2O6 Ceramics

  • 윤상옥 (강릉원주대학교 세라믹신소재학과) ;
  • 홍서영 (강릉원주대학교 대학원 재료공학과) ;
  • 조형환 (강릉원주대학교 대학원 재료공학과) ;
  • 김신 (강릉원주대학교 세라믹신소재학과)
  • Yoon, Sang-Ok (Department of Advanced Ceramic Materials Engineering, Gangneung-Wonju National University) ;
  • Hong, Seoyoung (Department of Materials Engineering, Graduate School, Gangueung-Wonju National University) ;
  • Cho, Hyung-Hwan (Department of Materials Engineering, Graduate School, Gangueung-Wonju National University) ;
  • Kim, Shin (Department of Advanced Ceramic Materials Engineering, Gangneung-Wonju National University)
  • 투고 : 2021.06.16
  • 심사 : 2021.06.25
  • 발행 : 2021.09.01
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초록

Phase evolution, sintering behavior, microstructure, and microwave dielectric properties of (1-x) mol Ba3V4O13 - (x) mol BaV2O6 system were investigated. The sintered specimens of all compositions consisted of Ba3V4O13 and BaV2O6, and no secondary phase was observed. As x increased, the linear shrinkage decreased to the composition of x=0.5, and then increased again, implying that Ba3V4O13 and BaV2O6 phases interfered mutually with each other during sintering. All compositions showed a dense microstructure with a large grain growth. Cracks were observed in some compositions because of the relatively high sintering temperature of 620~640℃. As x increased, the dielectric constant increased, while the quality factor was maintained from about 50,000 GHz to about 70,000 GHz up to the composition of x=0.9, and then decreased to 20,987~27,180 GHz at the composition of x=1.0. As x increased, the temperature coefficient of the resonance frequency showed a (+) value from a (-) value. The dielectric constant, the quality factor, and the temperature coefficient of resonant frequency of x=0.7 composition sintered at 640℃ for 4 hours were 10.61, 71,126 GHz, and -4.9 ppm/℃, respectively. This composition showed a good chemical compatibility with Al powder, indicating that the Ba3V4O13-BaV2O6 ceramics are a candidate material for ULTCC (Ultra-Low Temperature Co-fired Ceramics) applications.

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