溶胶凝胶法制备铝硅酸锂氚增殖陶瓷粉体  

Fabrication of Lithium Aluminosilicate Tritium Breeder Ceramic Powder by Sol-gel Process

作　　者：张数锋 芦伟 蒋友福 汪卫华 储德林 ZHANG Shu-feng;LU Wei;JIANG You-fu;WANG Wei-hua;CHU De-in(Anhui University,Anhui Hefei 230601,China)

机构地区：[1]安徽大学,安徽合肥230601

出　　处：《广州化工》2023年第7期46-49,共4页GuangZhou Chemical Industry

基　　金：国家自然科学基金资助项目(12005002、11975022);国家磁约束核聚变能发展研究专项(2019YFE03100100、2017YFE0300603)。

摘　　要：铝硅酸锂(Li_(9)AlSiO_(8))陶瓷材料可以结合偏铝酸锂(LiAlO_(2))和正硅酸锂(Li_(4)SiO_(4))的优点,显著提升锂含量、热导率和机械性能,获得较高的氚增殖率、释氚能力和球床稳定性。制备Li_(9)AlSiO_(8)采用溶胶凝胶法,通过水解和缩合反应获得凝胶,再通过高温烧结获得陶瓷粉体。通过热重-差示扫描量热分析确定干凝胶的预分解温度和产物的烧结温度。对烧结的产物粉体进行X射线衍射和扫描电子显微镜分析,获得产物的晶相、晶格常数和粒径等,进而计算得到材料锂含量。Lithium aluminosilicate(Li_(9)AlSiO_(8))ceramic material can combine the advantages of lithium metaaluminate(LiAlO_(2))and lithium orthosilicate(Li_(4)SiO_(4)),significantly increase lithium content,thermal conductivity and mechanical properties,and obtain higher tritium breeder rate and tritium release capacity and stability of the pebble bed.The preparation of Li_(9)AlSiO_(8) adopted the sol-gel process,through hydrolysis and condensation reaction,and then obtained ceramic powder through high temperature sintering.Through thermogravimetric-differential scanning calorimetry analysis,the pre-decomposition temperature of the xerogel and the sintering temperature of the product were determined.The sintered product powder was analyzed by X-ray diffraction and scanning electron microscope to obtain the crystal phase,lattice constant and particle size of the product,and then calculate the lithium content of the material.

关 键 词：溶胶凝胶法 氚增殖 正硅酸锂 

分 类 号：TQ132[化学工程—无机化工]