水热合成法制备细颗粒钨铜氧化物复合粉体

PREPARATION OF FINE PARTICLE W-Cu OXIDE COMPOSITE POWDER BY HYDROTHERMAL METHOD

钨铜氧化物复合粉末前驱体是制备高性能钨铜合金的关键。本文采用水热合成法制备钨铜合金前驱体—钨铜氧化物复合粉体,利用水热合成与共沉淀原理,采用X射线衍射(XRD)、扫描电镜(SEM)和光谱分析仪,研究了不同试剂与制备工艺对复合粉体成份与形貌的影响。研究结果表明,与传统方法相比,水热法工艺简单、易操作,是制备钨铜氧化物复合粉体的良好方法。以偏钨酸铵为原料制备的钨铜氧化物复合粉体颗粒在2～10μm之间,易团聚;钨酸钠为原料制备的复合粉体颗粒细小,但分布不均。粉体中的铜含量与混合溶液组成及其pH值有很大关系。

W-Cu oxide composite powder precursor is the key to prepare high-performance W-Cu alloy. In the paper, the precursor-W-Cu oxide composite powder is prepared by hydrothermal process using the principle of hydrothermal synthesis and co-precipitation. X ray diffraction （XRD）, scanning electron microscopy （SEM） and spectrum analyzer are used to investigate the effect of different reagent and preparation process on the composition and morphology of the composite powders. The research results show that hydrothermal synthesis process is simple and easy to operate, and is a good method to prepare W-Cu oxide composite powder in comparison with the traditional methods. With partial ammonium tungstate as raw material, the resulted W-Cu oxide composite powder is easy to reunion and the particle size is in the range of 2-10 μm; The fine and uneven W-Cu oxide composite powder is obtained with Sodium tungstate as raw material. The composition and pH value of the mixed solution significantly influence the copper content.