Technology for preparing lithium aluminate powder

Abstract

The invention discloses a technology for preparing lithium aluminate powder. Aluminum isopropoxide and lithium methoxide are converted into lithium aluminate nanotube bundles under the low-temperature hydrothermal condition. The technology includes the steps of mixing the aluminum isopropoxide, the lithium methoxide and deionized water; adding surfactants; carrying out refluxing till gelatinization is achieved; carrying out distilled water stirring hydrolysis; carrying out ultrasonic dispersing; carrying out a hydrothermal reaction; carrying out washing through distilled water; carrying out roasting. The ratio of alcohol to alkoxide generated after the aluminum isopropoxide, the lithium methoxide and the deionized water are mixed is 50:1 to 55:1, and the stirring temperature is 60 DEG C. The temperature of the hydrothermal reaction is 150 DEG C to 160 DEG C, and the reaction time is 2 d to 3 d. The roasting temperature is 500 DEG C to 600 DEG C, and the roasting time is 30 h to 40 h. The technology is easy to operate; the prepared lithium aluminate powder is stable in quality, good in insulation performance and high in mechanical strength, the good chemical stability is achieved at the high temperature, and the good application prospects are achieved.

Description

technical field [0001] The invention relates to a preparation process of lithium aluminate powder. Background technique [0002] Due to the development of fuel cell research work and the development of nuclear energy industry in recent years, the preparation of lithium metaaluminate (LiAlO2) has attracted more and more attention. The use of LiΑ102 powder mainly focuses on two aspects: one is used as a supporting membrane material for molten carbonate fuel cells (MCFC), and the other is used as a tritium breeding material for molten reactors. [0003] In recent years, developed countries such as Europe, America and Japan have made great progress in the development of high-efficiency molten carbonate fuel cells (MCFC) and in the research of tritium breeding experiments in mixed reactors. In particular, MCFC research in Japan and the United States has been carried out on experimental scale-up And set up the production line stage, therefore, LiAlO powder has great market demand...

AI Technical Summary

Problems solved by technology

Its advantages are that the process and equipment are simple, the purity of the product is high, and the sintering temperature is 200 ° C to 500 ° C lower than the traditional solid-phase method. The disadvantages are that the price of raw materials is high, the sinterability of the gel particles is poor, and the product shrinks greatly when it is dried.