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HWAHAK KONGHAK,
Vol.35, No.1, 35-40, 1997
Vol.35, No.1, 35-40, 1997
Sol-gel법에 의한 방사성 aluminum sol의 합성과 섬유제조
Preparation of Alumina Fibers from Spinnable Alumina Sols Prepared by the Sol-Gel Process
AlCl3-Al powder-H2O계 용액을 출발물질로 하여 Sol-Gel법에 의해 alumina섬유를 제조하였다. Alumina sol의 방사성은 Al분말의 용해량에 의해 결정되며, Al powder/AlCl3 몰비가 3에서 5인 점성용액으로부터 겔섬유를 얻을 수 있었다. 이때 점성용액으로부터의 섬유의 인상은 350-3000p의 고점도 영역에서 가능하였다. 이렇게 얻어진 겔섬유를 1000℃에서 2시간 동안 열처리함에 의해 α-Al2O3 섬유를 제조할 수 있었다.
Alumina fibers were prepared by the sol-gel process from AlCl3-Al powder-H2O solution as a starting material. The spinnability of alumina sols was determined by the dissolved content of aluminum powders and gel fibers could be obtained from viscous solutions in a composition range of Al powder/AlCl3 molar ratios of 3 to 5. Fiber drawing from the viscous solutions was possible in a high viscosity range of 350-3000p. α-Al2O3 fibers were formed by calcination of the gel fibers at 1000℃ for 2hr
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