Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of the Sintering Temperature and Atmosphere on the Microstructural Evolution and Shrinkage Behavior of CuO Ceramics

CuO 세라믹스의 소결 온도 및 분위기에 따른 미세구조와 수축거동 변화

  • Song, Ju-Hyun (School of Materials Science and Engineering, Kyungpook National University) ;
  • Lee, Jung-A (School of Materials Science and Engineering, Kyungpook National University) ;
  • Lee, Joon-Hyung (School of Materials Science and Engineering, Kyungpook National University) ;
  • Heo, Young-Woo (School of Materials Science and Engineering, Kyungpook National University) ;
  • Kim, Jeong-Joo (School of Materials Science and Engineering, Kyungpook National University)
  • 송주현 (경북대학교 신소재공학부) ;
  • 이정아 (경북대학교 신소재공학부) ;
  • 이준형 (경북대학교 신소재공학부) ;
  • 허영우 (경북대학교 신소재공학부) ;
  • 김정주 (경북대학교 신소재공학부)
  • Received : 2012.09.11
  • Accepted : 2012.10.29
  • Published : 2012.11.30
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Abstract

In this study, the densification behavior and microstructural evolution of CuO were examined when this material was sintered at different temperatures in $O_2$, air and Ar atmospheres. The CuO samples maintained their phases even after prolonged sintering at $900-1100^{\circ}C$ in an oxygen atmosphere. When sintering in air, the densification was faster than it was when sintering in oxygen. However, when the samples were sintered at $1100^{\circ}C$, large pores were observed in the sample due to the phase transformation from CuO to $Cu_2O$ which accompanies the generation of oxygen gas. The pore channels in the sample became narrower as the sintering time increased, eventually undergoing a Rayleigh breakup and forming discrete isolated pores. On the other hand, CuO sintering in Ar did not contribute to the densification, as all CuO samples underwent a phase transformation to $Cu_2O$ during the heating process.

Keywords

References

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