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以重晶石粉为基体,采用化学共沉淀技术制得表面包覆掺锑氧化锡的 Sb–SnO2/BaSO4 导电粉末。用差热/热重分析前驱体的热处理特性。用X 射线衍射表征样品的结构。系统研究水解 pH 值和温度、SnCl4·5H2O/SbCl3 摩尔比、SnCl4·5H2O 用量和焙烧制度对导电粉末电阻率的影响规律。产物的电阻率为 13 ?·cm、平均粒径为 3.4 μm,具有广泛的应用前景。探讨了锑掺杂氧化锡的缺陷与能级效应,确定了导电粉末中掺杂效应的缺陷反应。这种方法为矿物基功能材料的低成本制备提供了新的思路。
Using barite powder as matrix, Sb-SnO2 / BaSO4 conductive powder coated with antimony-doped tin oxide was prepared by chemical coprecipitation technique. Differential Thermal / Thermogravimetric Analysis of Heat Treatment Characteristics of Precursor. The structure of the sample was characterized by X-ray diffraction. The effects of hydrolysis pH value and temperature, molar ratio of SnCl 4 · 5H 2 O / SbCl 3, amount of SnCl 4 · 5H 2 O and calcination system on the resistivity of conductive powder were systematically investigated. The resistivity of the product is 13? Cm, the average particle size of 3.4 m, with a wide range of applications. The defects and energy level effects of antimony-doped tin oxide were discussed, and the defect reaction of the doping effect in the conductive powder was confirmed. This method provides a new idea for the low-cost preparation of mineral-based functional materials.