NiO/γ-Al2 O3复合粉体的制备及表征∗

摘要

单纯的NiO在高温下容易发生烧结、颗粒长大，导致比表面积减小，催化剂寿命降低，为改良NiO 的抗高温性能以Ni (NO3)3·6H2O、 Al (NO3)3·9H2O和NH3·H2O为原料，采用正、反向化学沉淀法制备NiO/γ-Al2 O3复合粉体，用XRD考察粉体的相结构。结果表明： NiO/γ-Al2 O3复合粉体为立方晶相。%Pure NiO under high temperature condition, easy occur agglomeration and grains growing bigger. It lead to the size of surface decrease and the lifespan of catalyst become lower. In order to improve the ability of NiO to resist the high temperature condition, uses Ni (NO3)3. 6H2O, Al(NO3)3·9H2O and NH3 ·H2 O. these materials are used with Forward chemical precipitating method and Reverse chemi-cal precipitating to make NiO/γ-Al2 O3 nanometre compound powder, then uses XRD to inspect the struc-ture of the powder. The result shows that: NiO/γ-Al2 O3 nanometre compound powder consist of cube-crystallizes.