化学共沉淀法制备纳米铋掺杂氧化锡的影响因素研究

Effects on the Bismuth-doped Tin Oxide Nano-powders Prepared by Co-precipitation

摘要:

以SnCl4.5H2O和Bi(NO3)3.5H2O为原料，氨水为沉淀剂，采用化学共沉淀法制备了铋掺杂氧化锡（BTO）纳米粉体，研究了反应温度、滴定终点pH值、铋掺杂量，煅烧温度和分散剂PEG-600对所得的纳米BTO粉体物相、晶粒度和形貌的影响，对粉末的前驱体进行综合热分析（TG-DTA），用X-射线衍射（XRD），扫描电镜(SEM)对产物的结构和形貌进行表征，得到共沉淀法制备纳米BTO粉体的最佳条件：反应温度60℃，滴定终点pH值为3，煅烧温度600℃；该条件下制得BTO粉体的电阻率最小为3.48Ω•cm。

Abstract:

Bismuth-doped Tin Oxide (BTO) nano-particless were prepared by chemical co-precipitation method using SnCl4.5H2O and Bi(NO3)3.5H2O as precursors and NH3.H2O as precipitant. Effects of processing parameters on particle were investigated. These parameters include reaction temperature，terminal pH，doping bismuth content, calcine temperature, and PEG-600 dispersant. The BTO precursors were studied by TG-DTA. The product particles were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The optimized conditions for preparing nanometer BTO powders were proposed: reaction temperature of 60℃, terminal pH of 3, and the calcine temperature of 600℃, the minimum resistivity of BTO powders is 3.48Ω•cm under the optimized conditions.