分光光度法测定高纯氧化铝中痕量硅方法改进  

Improvement of spectrophotometric method for the determination of trace silicon in high purity alumina

作　　者：王振越 韩凤兰[1,2,3] 康森 常慧 滕斌 Wang Zhenyue;Han Fenglan;Kang Sen;Chang Hui;Teng Bin(School of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China;International Scientific and Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials,Yinchuan 750021,China;Collaborative Innovation Center for High Value Utilization of Industrial By-products,Yinchuan 750021,China;TDG Yinxia New Material Co.,Ltd.,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]工业废弃物循环利用及先进材料国际科技合作基地,宁夏银川750021 [3]工业副产物高值化利用协同创新中心,宁夏银川750021 [4]天通银厦新材料有限公司,宁夏银川750021

出　　处：《轻金属》2019年第11期16-21,共6页Light Metals

基　　金：大尺寸蓝宝石晶体品质控制技术研究(宁夏回族自治区科技攻关计划)项目编号:2018BDE13005

摘　　要：采用硅钼蓝法测定氧化铝中硅的含量,用硫酸(1+5.5)作为溶剂溶解氧化铝粉末,显色剂采用钼酸铵与硅络合,再用L-抗坏血酸还原,并加入2.0 ml柠檬酸,在波长815 nm处用3 cm比色皿测定硅的含量。在50 ml体系中,Si含量在低于20μg时与吸光度呈良好的线性关系,r^2=0.99696,用该法成功检测了氧化铝中痕量硅元素的含量,检测范围为0.64~15μg/g,标准偏差小于8%,标准回收率在93%~105%之间。该方法用于检测高纯三氧化二铝粉末,成本低廉,精密度高,其推广使用对蓝宝石生产具有重要意义。Silicon content in alumina was determined by molybdenum blue method.Alumina powder was dissolved with sulfuric acid(1+5.5)as solvent.Ammonium molybdate was complexed with silicon as colorant,and then reduced by L-ascorbic acid,and added with 2.0 ml citric acid.The siliconcontent was measured in a 3 cm cupel at the wavelength of 815 nm.In 50 ml system,the linear relationship between silicon content and absorbance is good when the content is less than 20μg,and the correlation coefficient of r2 is 0.99696.The content of Trace Silicon in alumina is successfully determined by this method.The detection range is 0.64-15μg/g,the standard deviation is less than 8%,and the standard recoveryrate is from 93%to 105%.This method is used to detect high purity aluminium trioxide powder with low cost and high precision.Its popularization is of great significance to sapphire production.

关 键 词：分光光度法 氧化铝 痕量硅 硅钼蓝法 

分 类 号：TF821[冶金工程—有色金属冶金] TQ133.1[化学工程—无机化工]