Low-temperature Synthesis of Highly Disperse Lithium Gamma-Monoaluminate
OLGA A. KHARLAMOVA1,2, RAISA P. MITROFANOVA1, KONSTANTIN A. TARASOV1, LYUDMILA E. CHUPAKHINA1, VITALIY P. ISUPOV1, ANATOLIY S. ZYRYANOV3, KONSTANTIN A. ALEKSANDROV3, NIKOLAY N. BATALOV3 and ZINAIDA R. KOZLOVA3
1Institute of Solid State Chemistry and Mechanochemistry,
Siberian Branch of the Russian Academy of Sciences,
Ul. Kutateladze 18, Novosibirsk 630128 (Russia), E-mail: isupov@solid.nsk.su
2Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090 (Russia)
3Institute of High-Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences,
Ul. S. Kovalevskoy 22, Yekaterinburg 620219 (Russia)
Pages: 379-383
Abstract
A new method for the synthesis of highly disperse lithium gamma-monoaluminate is suggested. Binary lithium-aluminum hydroxide in carbonate form [LiAl2(OH)6]2CO3 . 3H2O is used for the precursor. Calcination of a mixture of this hydroxide with lithium carbonate above 800oC forms γ-LiAlO2. The sequence of chemical transformations leading to γ-LiAlO2 has been studied. The first stage of the synthesis yields α-LiAlO2; when heated to a temperature above 800oC, the latter is transformed into γ-LiAlO2. The specific surface of the aluminate product is 3.5m2/g. Test experiments showed that the product may be used as a holder for fuel elements with a melted carbonate electrolyte.
|
