Synthesis of long fibrous $K_2Ti_4O_9$ was attempted to find a method to produce long fibrous $K_2Ti_6O_{13}$ and other derivatives and also phase transformation of $K_2Ti_4O_9$ synthesized was investigated. Long fibrous $K_2Ti_4O_9$ was succesively synthesized by the calcination reaction under the following reaction conditions ; reaction temperature of $1050^{\circ}C$, $TiO_2$ mole ratio to $K_2CO_3$ of 2.8 and reaction time of 3hrs, and scattering of calcined products for 10hrs with hot boiling water. $K_2Ti_4O_9$ showed lower structural stability under heat treatment and the structure of $K_2Ti_4O_9$ was converted to $K_2Ti_6O_{13}$ under heating temperature of over $250^{\circ}C$.
소성법을 이용하여 반응은도 $1050^{\circ}C$, 반응시간 3시간, $K_2CO_3$에 대한 $TiO_2$(rutile)의 mole ratio 2.8 그리고 $1^{\circ}C/min$의 서냉속도로 서냉하여 초생상을 합성하였으며, 이를 비등수로 10시간 처리하여 층상구조를 갖는 장섬유의 $K_2Ti_4O_9$을 효과적으로 합성하였다. 또한 합성된 $K_2Ti_4O_9$의 열적안정성을 조사하였으며, 이 결과 $K_2Ti_4O_9$은 열적으로 매우 불안정하여 온도가 올라감에 따라 $K_2O$와 $K_2Ti_6O_{13}$으로 분리됨을 확인하였다.
Keywords
Acknowledgement
Supported by : 한국과학재단, 삼중정밀화학
References
Inorg. Chem.
v.28
T. Sasaki;Y. Komatsu;Y. Fujiki
J. Solid State Chem.
v.92
T. Sasaki(et al.)
Mat. Res. Bull.
v.22
T. Sasaki;Y. Komatsu;Y. Fujiki
セラシッラヌ
v.27
T. Sasaki;Y. Fujiki
セラミックス
v.19
Y. Fujiki;T. Mitsuhashi
Yogyo-kyokai-shi
v.85
T. Shimizu(et al)
Yogyo-kyokai-shi
v.89
N. Ohta;. Fujiki
Yogyo-kyokai-shi
v.91
Y. Fujiki
Yogyo-kyokai-shi
v.88
Y. Fujiiki;N. Ohta
공업화학
v.5
이철태;최웅수;김영명
공업화학
v.5
이철태;이진식;김성원;김영명;권긍택
공업화학
v.6
이철태;이진식;이상문;박용성
J. Inorg. Nucl. Chem.
v.28
C. Heitner-Wirguin;A. Albu-Yaron