本研究用溶胶凝胶法和化学镀法两种方法制备超细CoAl2O4粉体,并且利用XRD,SEM,EDX,DTA等手段进行了检测.结果表明两种方法制备的粉体有相同的尖晶石转变温度;溶胶凝胶法制备的粉体成分严格符合化学计量比,化学镀法制备的粉体中Al是过量的.与溶胶凝胶法相比,用化学镀法来制备的粉体粒度小而且均匀一致,比表面积大,可以很好地控制粉体的粒度和组成.在化学镀制备工艺下,粉体催化剂的反应接触面积较大,有可能获得较高的催化效率;而且用便宜的Al2O3部分替代了昂贵的CoAl2O4.降低了成本,说明化学镀法是一种制备超细CoAl2O4粉体的高效方法.
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