| 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 |
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| ABSTRACT |
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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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