Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of Monodispersed, Sheperical Al2O3 and Mg-doped Al2O3 Powder and Sintering Characterization of These Powders

구형의 단분산 Alumina 및 Mg-doped Alumina의 합성과 소결에 관한 연구

  • 이중윤 (한양대학교 무기재료공학과) ;
  • 부재필 (한양대학교 무기재료공학과) ;
  • 최상흘 (한양대학교 무기재료공학과)
  • Published : 1994.01.01
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Abstract

Monodispersed alumina and Mg-doped alumina fine particles were prepared by controlled hydrolysis of alkoxides. Aluminium alkoxide and magnesium alkoxide were dissolved into complex solvent which was composed of hydrophobic n-octanol and hydrophilic acetonitrile. Hydroxypropyl cellulose(HPC) was used as a dispersant for the alumina particles. The size of these prepared powders was approximately 0.3 ${\mu}{\textrm}{m}$. In the case of sintering above 100$0^{\circ}C$, most of these prepared powders were transformed to $\alpha$-alumina. The relative density of the sintered body of these prepared powders at 1$600^{\circ}C$ was 98%. The sintered body of the Mg-doped alumina powder had more uniform grain size than that of the undoped alumina podwer.

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References

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