Fabrication of Li4SiO4 pebbles by a sol–gel technique
Fabrication of Li4SiO4 pebbles by a sol–gel technique
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DOI：
10.1016/j.fusengdes.2010.01.018
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发表时间：
2010-04
影响因子：
1.7
通讯作者：
Xiangwei Wu;Z. Wen;Xiaogang Xu;Yu Liu
中科院分区：
文献类型：
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作者：
Xiangwei Wu;Z. Wen;Xiaogang Xu;Yu Liu
在许多毯子设计中，Li4SiO4鹅卵石被认为是候选的陶瓷孕育材料。本工作以LiOH和SiO_2(气溶胶)为原料，采用水基溶胶-凝胶法制备了球度良好的Li4SiO_4鹅卵石，这是以前未见报道的。系统地进行了热分析、物相分析和形貌观察。讨论了LiOH/C6H8O7摩尔比和烧结温度对卵石显微结构和密度的影响。实验结果表明，当LiOH/C6H8O7摩尔比为3时，Li4SiO4卵石的微观结构最有利。在900℃下烧结4h，可得到直径约1.2 mm的Li4SiO4鹅卵石，其密度约为74%。
Li4SiO4pebbles are considered as candidate ceramic breeder materials in many blanket designs. In this work, Li4SiO4pebbles with adequate sphericity were fabricated by a water-based sol–gel process using LiOH and SiO2(aerosil) as the raw materials, which has not been reported for fabrication of Li4SiO4pebbles previously. Thermal analysis, phase analysis and morphological observations were carried out systematically. The effects of LiOH/C6H8O7molar ratios and sintering temperature on the microstructure and density of the pebbles were discussed. Experimental results showed that when the LiOH/C6H8O7molar ratio was 3, the microstructure of the Li4SiO4pebbles was the most favorable. While sintered at 900°C for 4h, Li4SiO4pebbles with about 1.2mm in diameter were obtained and the density of the pebbles achieved about 74%.