한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제28권6호
  • /
  • Pages.465-470
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  • 1991
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  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

Al2(SO4)3.18H2O로부터 AlN 분말의 합성: I. 침전법

Synthesis of AlN Powder from Al2(SO4)3.18H2O: I. Precipitation Method

  • 발행 : 1991.06.01
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초록

AlN powder was synthesized by carbothermal reduction and nitridation of aluminum hydroxides precipitated in 5∼11 pH range from Al2(SO4)3$.$18H2O aqueous solution. Nitridation reactivity of hydroxide, which depends on precipitation pH, reaction temperature and time, was examined by XRD analysis at 1200∼1350$^{\circ}C$ and compared with that of commercial ${\alpha}$-Al2O3. Hydroxides obtained at higher pH could be more easily nitridated and, considering DTA/TG and BET results, the reason seems to be specific surface area difference of reactants depending on the content of decomposed structural water and the transition rate from transition-Al2O3 to ${\alpha}$-Al2O3.

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참고문헌

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