Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.3, 580-587, June, 1996
소성법에 의한 4티탄산칼륨 장섬유의 합성 및 상전이
The Synthesis of Long Fibrous Potassium Tetratitanate by the Calcination Process and Phase Transformation
초록
소성법을 이용하여 반응은도 1050℃, 반응시간 3시간, K2CO3에 대한 TiO2(rutile)의 mole ratio 2.8 그리고 1℃/min의 서냉속도로 서냉하여 초생상을 합성하였으며, 이를 비등수로 10시간 처리하여 층상구조를 갖는 장섬유의 K2Ti4O9을 효과적으로 합성하였다. 또한 합성된 K2Ti4O9의 열적안정성을 조사하였으며, 이 결과 K2Ti4O9을 은 열적으로 매우 불안정하여 온도가 올라감에 따라 K2O와 K2Ti6O 13으로 분리됨을 확인하였다.
Synthesis of long fibrous K2Ti4O9 was attempted to find a method to produce long fibrous K2Ti6O13 and other derivatives and also phase transformation of K2Ti4O9 synthesized was investigated. Long fibrous K2Ti4O9 was succesively synthesized by the calcination reaction under the following reaction conditions ; reaction temperature of 1050℃, TiO2 mole ratio to K2CO3 of 2.8 and reaction time of 3hrs, and scattering of calcined products for 10hrs with hot boiling water. K2Ti4O 9 showed lower structural stability under heat treatment and the structure of K2Ti4O9 was converted to K2Ti6O13 under heating temperature of over 250℃.
- Sasaki T, Komatsu Y, Fujiki Y, Inorg. Chem., 28, 2776 (1989)
- Sasaki T, J. Solid State Chem., 92, 537 (1991)
- Sasaki T, Komatsu Y, Fujiki Y, Mater. Res. Bull., 22, 1321 (1987)
- Sasaki T, Fujiki Y, セラシツラヌ, 27, 432 (1992)
- Fujiki Y, Mitsuhashi T, セラミシクス, 19, 200 (1984)
- Shimizu T, Yogyo-Kyokai-Shi, 85, 567 (1977)
- Ohta N, Fujiki Y, Yogyo-Kyokai-Shi, 89, 134 (1981)
- Fujiki Y, Yogyo-Kyogai-Shi, 91, 189 (1983)
- Fujiki Y, Ohta N, Yogyo-Kyokai-Shi, 88, 12 (1980)
- Lee CT, Choi US, Kim YM, J. Korean Ind. Eng. Chem., 5(1), 160 (1994)
- Lee CT, Kim SW, Lee JS, Kim YM, Kwon KT, J. Korean Ind. Eng. Chem., 5(3), 478 (1994)
- Lee CT, Lee JS, Lee SM, Park YS, J. Korean Ind. Eng. Chem., 6(6), 997 (1995)
- Heitner-Wirguin C, Albu-Yaron A, J. Inorg. Nucl. Chem., 28, 2379 (1966)
- Abe M, Tsuji M, Chromatographia, 13, 626 (1980)
- Dean JA, Lange's Handbook, 4-95, McGraw-Hill, Inc., New York (1985)