The Korean Journal of Ceramics

한국세라믹학회 (The Korean Ceramic Society)
권호 표지

Thermal Shock Behavior of Barium Titanate Ceramics

  • Jae Yeon Kim (Department of Materials Science and Engineering, The University of Seoul) ;
  • Young Wook Kim (Department of Materials Science and Engineering, The University of Seoul) ;
  • Kyeong Sik Cho (Division of Ceramics, Korea Institute of Science and Technology) ;
  • June Gunn Lee (Division of Ceramics, Korea Institute of Science and Technology)
  • 발행 : 1997.09.01
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초록

Post-firing process of electronic ceramic, such as electroding and encapsultion with resin, often causes damage by thermal shock. The thermal shock behavior of $BaTiO_3$ ceramics was investigated by the down-quench test, where the relative strength retained is determined after the sample is quenched from an elevated temperature into a fixed temperature bath. The critical temperature drop, $\DeltaTc$, was evaluated for three kinds of sintered $BaTiO_3$ ceramics, which were formed by extrustioin, uniaxial pressing using granules, and uniaxial pressing using powders. A drastic loss in strength caused by microcracking was observed for the specimens quenched with $\DeltaT\geq150^{\circ}C$. This concentp can be adopted as a method of the quality control by monitoring the sudden drop of the strength of capacitor products after each exposure to heat.

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참고문헌

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