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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrical Properties of (Ba0.27CaSr)(Zr0.95Ti0.05)O3 Dielectric Ceramic with C0G Temperature Characteristics

  • Hong Sun Lee (R&D Center, Samwha Capacitor) ;
  • Jung Rag Yoon (R&D Center, Samwha Capacitor)
  • Received : 2024.08.12
  • Accepted : 2024.08.29
  • Published : 2024.11.01
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Abstract

In this study, the electrical properties of a C0G (class 1 ceramic) dielectric composition with internal reducibility, specifically (Ba0.27CaSr)(Zr0.95Ti0.05)O3, were investigated by fixing Ba at the A site and varying the Ca/Sr molar ratio. The potential application of this composition in high-permittivity C0G MLCCs was examined. The powder was calcined at 1,150℃ for 2 hours, as determined by TG-DTA analysis, and the resulting powder was ground to achieve a particle size (D50) of 0.35 to 0.4 ㎛ and a specific surface area (BET) of 4.5 to 5.0 g/m2. With a Ca/Sr molar ratio of 0.3, the composition (Ba0.27Ca0.17Sr0.56) (Zr0.95Ti0.05)O3 exhibited electrical properties with a permittivity of 41.9, a loss of less than 0.008%, and an insulation resistance exceeding 2.2×1013 Ω. The feasibility of using this composition for high-capacitance C0G MLCCs was confirmed.

Keywords

Acknowledgement

This work was supported by the Technology Innovation Program (RS-2024-00430833, Development of MLCC commercialization technology for automotive electronics an alternative to rare earth for high reliability response) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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