한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제25권4호
  • /
  • Pages.415-423
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  • 1988
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

Ethyl Silicate로부터 Silicon Nitride의 합성(I)

Synthesis of Silicon Nitride from Ethyl Silicate(I)

  • 오일환 (대구공업전문대학 요업과) ;
  • 박금철 (한양대학교 공과대학 무기재료공학과)
  • 발행 : 1988.04.01
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초록

Mixtures of carbon and silica (about 0.46${\mu}{\textrm}{m}$) which was synthesized by the hydrolysis of ethyl silicate, the molar ratio of silica/carbon was fixed as 1/10(weight ratio : 1/2), were nitrided in the temperature range 135$0^{\circ}C$~150$0^{\circ}C$. The phse of the product Si3N4 was $\alpha$ phase and the morphology was hexagnoal prism and the nitridation reaction was completed in 5 hrs at 150$0^{\circ}C$ or 7hrs at 145$0^{\circ}C$. The reaction rate above 150$0^{\circ}C$ was diffusion-controlled, following Jander equation. Activation energy Q was derived from the Arrhenius plot and the value was about 101kcal/mol. Axis ratio of Lattice constants(c/a) was 0.726 and unit volume was $\AA$3, the larger the molar ratio of carbon/Alkoxide was, the smaller the particle size of $\alpha$Si3N4 was.

키워드

참고문헌

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