Authors: Maoqiao Xiang Yingchun Zhang Yun Zhang Wei Liu Chaofu Wang Yonghong Yu
Publish Date: 2016/03/11
Volume: 35, Issue: 4, Pages: 652-659
Abstract
Currently Li4SiO4 has been considered one of the best candidates for tritium breeders Besides it has also been suggested to be the promising hightemperature carbon dioxide CO2 solid sorbent and lithium ion conducting material As the knowledge of reaction kinetics can offer either a practical or theoretical purpose for predicting and optimizing the reaction process the kinetics of formation of Li4SiO4 from Li2CO3 and Li2SiO3 were investigated by nonisothermal thermogravimetric technique at four different heating rates The Malek method results showed that the reaction was the Avarami–Erofeev model ie at about 650 °C the Li2SiO3 and Li2CO3 with molar ratio of 11 formed Li4SiO4 crystal nucleus randomly and then it grew by the diffusion of Li and O through Li4SiO4 layer And the diffusion stage was the rate controlling step The performances of Li4SiO4 pebbles fabricated by a graphite bed process using Li2SiO3 and Li2CO3 were also evaluatedThis work has been financially supported by the National Natural Science Foundation of China Nos 51372017 and 51172019 International Thermonuclear Experimental Reactor ITER Project of China No 2014GB123000 and National Magnetic Confinement Fusion Energy Research Project No 2015GB121006
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