自蔓延制备高纯二硅化钼粉体

Synthesis of Pure Molybdenum Disilicide by Self-Propagating Combustion Method

研究了利用化学炉自蔓延合成方法合成高纯二硅化钼粉体,以点燃的C和Ti粉混合物为化学炉,以NH_4Cl作为添加剂,成功的合成出高纯二硅化钼粉体。所得合成产物经XRD、XRF和SEM分析结果表明,添加有NH_4Cl的化学炉方法自蔓延合成出的二硅化钼粉体较常规自蔓延合成方法合成出的粉体,纯度高、杂质含量少,且粒度细、均匀。

Highly pure molybdenum disilicide was prepared using the ＂chemical oven＂ enhanced self-propagating combustion method. The mixtures of Si and Ti poders were ignited as the chemical oven, and ammonium chloride was used as the additive. The compostion of product was analyzed by X-ray diffraction （XRD） and X-fluorescence analysis. The molybdenum disilicide product was in single phase with trace impurities. Scanning electron microscopy （SEM） showed the product was homogeneous and finer in particle sizes comparing to the product by normal SHS method.