【摘要】 以硝酸铜和二钼酸铵为原料,采用溶胶-凝胶法制备了纳米MoCu复合粉体,研究了热处理工艺,溶液pH值,添加剂等对纳米粒子形貌及粒径的影响。结果表明,在600℃热处理的钼铜氧化物通过氢气还原之后可以得到粒径小于60nm的纳米MoCu复合粉体;溶液中添加剂的用量影响微粒的粒径,当添加剂用量K为0.5时,能得到尺寸较小,粒度均匀的纳米粉体;不同酸度条件下所得粉体的粒径各不相同,当pH值在1-4之间变化时粒径随pH值的增大而增大,pH值取1较合适。更多还原

【Abstract】 Cu(NO3)2and (NH4)2Mo2O7 were used to fabricate Mo/Cu composite nanopowders by sol-gel technique. The influences of heat treatment process, solution pH value and the addition agent on the particle size were investigated by DTA-TG, XRD and TEM. The results show that under certain heat treatment temperature, the quantity of the addition agent influences the grain size of nanoparticle. When the quantity ratio of addition agent is 0.5, we can get fine nanoparticles with small grain size and homogeneous granularity. The particle sizes are varied under various solution acidities. When pH values change form 1 to 4, the particle sizes increase with the increase of pH value, the most suitable pH value is 1.更多还原