采用小角X射线散射方法, 对以水合肼溶液还原法制备的纳米金属镍粉的内团聚进行了两个方面的表征: 1) 内团聚的尺寸及其分布和比表面积等微观参数的测定; 2) 内团聚的分形维数测定.结果表明: 纳米镍粉颗粒由相互嵌套包含的非均匀内团聚区域组成; 这些内团聚实为一些离散镍分布非均匀区域, 并由此导致局域非均匀电子分布而形成对X射线的小角散射; 内团聚在1～100nm范围内遵循质量生长分形规律.
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