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J. Korean Ceram. Soc. > Volume 33(10); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(10): 1079.
졸-겔법에 의한 $gamma-LiAlO_2$ 단섬유의 제조
현상훈, 이재현, 홍성안1
연세대학교 세라믹공학과
1KIST 화공연구부
Preparation of $gamma-LiAlO_2$ Short Fibers by the Sol-Gel Method
ABSTRACT
Discontinuous ${gamma}$-LiAlO2 fibers for fiber-reinforcing MCFC matrixes have been produced by the sol-gel process using the centrifugal spinning apparatus of the Rotary type. Gel fibers could be obtained through spinning of stable LiAlO2 complex polymetric sols under the optimum spinning conditions (hollow-disc rotating velocity 9000 rpm sol feeding rate of 4ml/min flowing N2 temperature of 4$0^{circ}C$ and flowing N2 pressure of 4 bar). It was found that defect free and densified ${gamma}$-LiAlO2 fibers with the relative density of 98% and the mean diameter of 4.7${mu}{textrm}{m}$ were prepared when the spinned fibers were heat-treated to 100$0^{circ}C$ on the specified heating schedule. in particular the mean diameter and length of fibers could be controlled by the pressure of flowing N2 and the chopping-sieving method respectively.
Key words: $\gamma-LiAlO_2$ fibers, MCFC, Complex polymeric sols, Sol-gel method, Centrifugal spinning
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