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[국내논문] Low-Temperature Sintering Behavior of Aluminum Nitride Ceramics with Added Copper Oxide or Copper 원문보기

한국세라믹학회지 = Journal of the Korean Ceramic Society, v.56 no.1, 2019년, pp.104 - 110  

Hwang, Jin-Geun (The Center of Biomedical Materials and Biotechnology, The Center of Green Materials Technology, Department of Materials Science and Engineering, Andong National University) ,  Oh, Kyung-Sik (The Center of Biomedical Materials and Biotechnology, The Center of Green Materials Technology, Department of Materials Science and Engineering, Andong National University) ,  Chung, Tai-Joo (The Center of Biomedical Materials and Biotechnology, The Center of Green Materials Technology, Department of Materials Science and Engineering, Andong National University) ,  Kim, Tae-Heui (The Center of Biomedical Materials and Biotechnology, The Center of Green Materials Technology, Department of Materials Science and Engineering, Andong National University) ,  Paek, Yeong-Kyeun (The Center of Biomedical Materials and Biotechnology, The Center of Green Materials Technology, Department of Materials Science and Engineering, Andong National University)

Abstract AI-Helper 아이콘AI-Helper

The low-temperature sintering behavior of AlN was investigated through a conventional method. $CaF_2$, CuO and Cu were selected as additives based on their low melting points. When sintered at $1600^{\circ}C$ for 8 h in $N_2$ atmosphere, a sample density > 98% was ob...

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제안 방법

  • In order to identify such an additive, CaF2, Cu and CuO were investigated due to their low melting points as well as the oxygen gettering effect. In this study, densification, microstructure evolution, and thermal conductivity were examined for samples sintered at the low temperature of 1600℃. Based on the results, the present systems showed favorable characteristics for improving the low-temperature sintering behavior of AlN.
  • Microstructures were observed on fractured surfaces with SEM (VEGA II LMU, TESCAN). To observe grain boundary phases, HRTEM (TECNAI 30F, FEI) and energy dispersive spectroscopy (EDS) were performed. TEM samples were prepared using FIB (focused ion beam: LYRA3, TESCAN).

대상 데이터

  • A mixed powder composed of CaF2, Al2O3, and CuO or Cu was added to the AlN as an additive. Two kinds of sample powder were prepared: (1) 86AlN-2.8CaF2-8.4Al2O3-2.8Cu(S1), and (2) 86AlN-2.8CaF2-8.4Al2O3-2.8CuO(S2). The compositions were empirically determined and represented in wt.
  • To observe grain boundary phases, HRTEM (TECNAI 30F, FEI) and energy dispersive spectroscopy (EDS) were performed. TEM samples were prepared using FIB (focused ion beam: LYRA3, TESCAN). The thermal conductivity of each sample was calculated based on thermal diffusivity and heat capacity using laser flash technique at 298 K.

이론/모형

  • Sintered densities were obtained by the Archimedes method using distilled water as an immersion medium. Every density datum was determined by an average of three similar specimens.
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참고문헌 (17)

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  3. Lee, Hyun Min, Bharathi, Kamala, Kim, Do Kyung. Processing and Characterization of Aluminum Nitride Ceramics for High Thermal Conductivity. Advanced engineering materials, vol.16, no.6, 655-669.

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  8. Holman 9 1981 

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  12. 홍준성, 이정훈, 오유나, 조광준, 류도형, 오승탁, 현창용. Cu-Cu2O계 공융액상을 활용한 Cu/AlN 직접접합. 한국분말야금학회지 = Journal of Korean Powder Metallurgy Institute, vol.20, no.2, 114-119.

  13. Zhang, P., Fu, R., Tang, Y., Cao, B., Fei, M., Yang, Y.. Morphology of thick film metallization on aluminum nitride ceramics and composition of interface layer. Ceramics international, vol.41, no.10, 13381-13388.

  14. Qiao, Liang, Zhou, Heping, Xue, Hao, Wang, Shaohong. Effect of Y2O3 on low temperature sintering and thermal conductivity of AlN ceramics. Journal of the European Ceramic Society, vol.23, no.1, 61-67.

  15. Liu, Yaocheng, Zhou, Heping, Qiao, Liang, Wu, Yin. Low‐Temperature Sintering of Aluminum Nitride with YF3–CaF2 Binary Additive. Journal of materials science letters, vol.18, no.9, 703-704.

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  17. German 293 1996 

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