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합성방법에 따른 K2Ti4O9 섬유의 형상변화
Effects of Synthetic Methods on the Morphological Changes of K2Ti4O9 Fiber
HWAHAK KONGHAK, August 1996, 34(4), 477-481(5), NONE
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Abstract
용융법과 졸겔법을 이용하여 4티탄산칼륨(K2Ti4O9)을 합성하여 형상 및 표면적 변화를 연구하엿다. 용융법으로 생성한 K2Ti4O9보다 졸겔법의 경우 더 길고 얇은 섬유상인 길이 7-10μm, L/D가 40-50의 K2Ti4O9가 성장되었다. 초임계 건조를 적용한 졸겔법으로부터 초임계 건조 후 섬유상의 중간체가 형성이 되었고 이를 다시 소성시킴에 따라 길이 0.5-1μm, L/D는 10-300의 K2Ti4O9 섬유를 얻을 수 있었다. 표면적은 초임계 건조를 행한 졸겔법의 경우 가장 큰 20-25m2/g를 나타내었다. 형성된 K2Ti4O9의 형태와 표면적은 합성방법과 조건에 영향을 받는 것으로 나타났다.
Potassium tetratitanate(K2Ti4O9) was synthesized by melting method and sol-gel method. Changes of morphology and surface area of K2Ti4O9 were also investigated. In sol- gel method, K2Ti4O9 fiber was formed with 7-10 μm in length and L/D was 40-50 which is higher than that of melting method. Intermediate phase was obtained by sol-gel method adopted with supercritical drying. After calcination of the intermediate phase, K2Ti4O9 fibers were formed with 0.5-1 μm in length and L/D was 10-300, which is thinner and shorter than that of melting and sol-gel method. By using sol-gel method adopted supercritical drying, the highest surface area of 20-25 m2/g was obtained. The morphology and surface area of K2Ti4O9 were affected by synthetic methods and conditions.
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