Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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A Study on the Preparation of MgO-Al2O3-SiO2 System Ceramic Powders by Spray Pyrolysis Method

분무열분해법에 의한 MgO-Al2O3-SiO2계 화합물의 분체합성 및 그 특성

  • 박정현 (연세대학교 공과대학 요업공학과) ;
  • 박찬욱 (연세대학교 공과대학 요업공학과) ;
  • 조경식 (연세대학교 공과대학 요업공학과)
  • Published : 1988.04.01
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Abstract

Spinel, mullite and cordierite powders have synthesized from Mg(NO3)2.6H2O, Al(NO3).9H2O and SiCl4 solution by spray pyrolysis method. The two-fluid nozzle was used as an atomizer. The powders of sinel and mullite were synthesized above 80$0^{\circ}C$, but the cordierite composition was noncrystalline for all synthersizing temperature. Those noncrystalline powders were crystallized to $\alpha$-cordierite during calcining at 130$0^{\circ}C$ for 2hrs. The synthesized spinel, mullite and cordierite powders seem to be consisted of agglomerated hollow spherical particles. For all powders, the particle size ranged from submicron to about 3${\mu}{\textrm}{m}$ and mean particle size was about 1.4${\mu}{\textrm}{m}$ in diameter. The specific surface area values of spinel, mullite and cordierite powders were maximum for powders prepared at 100$0^{\circ}C$, and those were 45.9, 25.8 and 13.6$m^2$/gr, respectively.

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