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J. Korean Ceram. Soc. > Volume 49(6); 2012 > Article
Journal of the Korean Ceramic Society 2012;49(6): 528.
doi: https://doi.org/10.4191/kcers.2012.49.6.528
CuO 세라믹스의 소결 온도 및 분위기에 따른 미세구조와 수축거동 변화
송주현, 이정아, 이준형, 허영우, 김정주
경북대학교 신소재공학부
Effect of the Sintering Temperature and Atmosphere on the Microstructural Evolution and Shrinkage Behavior of CuO Ceramics
Ju-Hyun Song, Jung-A Lee, Joon-Hyung Lee, Young-Woo Heo, Jeong-Joo Kim
School of Materials Science and Engineering, Kyungpook National University
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.
Key words: CuO, $Cu_2O$, Sintering, Phase transition
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