Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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A Study on the Hydrothermal Synthesis of Clay Mineral (II) -Hydrothermal Synthesis of Clay Mineral from Anorthite in San.Chung District of Korea-

수열반응에 의한 인공점토의 합성연구 (II) -경남 산청산 회장석으로부터 인공점토의 수열합성에 관한 연구-

  • 이응상 (한양대학교 무기재료공학과) ;
  • 이상훈 (한양대학교 무기재료공학과)
  • Published : 1995.06.01
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Abstract

The synthesis of clay mineral through the hydrothermal reaction of the anorthite, which is distributed in San Chung-District of Korea and called as the ground rock for halloysite-kaolin, has been investigated. It was observed that this anorthite sample was easily converted into clay mineral with 0.5 wt% HCl solution at a temperature below 20$0^{\circ}C$ under a pressure about 15 atm. The conversion reaction was promoted by adding aluminum chloride under the condition concerned. Aluminum chloride was considered to supply the insufficient aluminum ion during the conversion reaction and to reprepare the acid solution-condition by adding the HCl-component as a by-product. According to the electron micrographs, it was confirmed that fine tubular or needle-shaped halloysite-kaolin minerals with the crystal length shorter than about 1.1${\mu}{\textrm}{m}$ could be obtained by the hydrothermal reaction for 5 days under those conditions.

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References

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