电弧工艺参数对合成Sb2Te3热电粉末材料的影响
Effects of Arc Parameters on Synthesis of Sb2Te3 Thermoelectric Powders
段兴凯1, 江跃珍2
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作者单位：(1. 九江学院 机械与材料工程学院 新能源材料研究中心, 江西 九江 332005; 2. 九江学院 电子工程学院, 江西 九江 332005)
中文关键字：Sb2Te3； 电弧电流； 氩气压力； 电弧等离子体； 热电材料
英文关键字：antimony telluride; arc current; argon gas pressure; arc plasma; thermoelectric materials
中文摘要：以单质Sb，Te粉末为原材料，采用真空电弧等离子体蒸发法对原材料进行加热、蒸发、气化并在收集体表面进行化学反应形成粉末，从而合成Sb2Te3热电粉末材料。研究了电弧电流和氩气压力对合成Sb2Te3热电粉末材料的平均粒径和生产率的影响，并通过场发射扫描电镜表征了Sb2Te3热电粉末材料的微观结构。结果表明，在100～175 A，随着电弧电流增大，粉末的平均粒径和生产率增加。在2～8 kPa的氩气压力下，随着气体压力增大，粉末的平均粒径和生产率增大，粉末团聚较明显。
英文摘要：Taking elemental antimony and tellurium powders as raw material, Sb2Te3 powders were successfully prepared by vacuum arc plasma evaporation technique. The raw materials were heated, evaporated and formed on the surface of collecting device by reacting. The microstructure of the samples was characterized via field emission scanning electron microscope (FESEM). The effects of arc current and argon gas pressure on average particle size and yield rate of Sb2Te3 powders were investigated. The results show that, as the arc current increases in the range of 100～175 A, the average particle size and yield rate of Sb2Te3 powders increases. As the argon gas pressure increases in the range of 2～8 kPa, the average particle size and yield rate of the powders increase, and powder agglomeration is also obvious.