Microstructural studies of nanocrystalline a-alumina powder produced from Al-13-cluster

作者：Ahmad Megat Harun Al Rashid Megat^*; Mohamed Abdul Aziz; Ibrahim Azmi; Mahmood Che Seman; Putra Edy Giri Rachman; Jamro Rafhayudi; Kasim Razali; Zin Muhammad Rawi Muhammad

来源：Journal of Physics and Chemistry of Solids, 2007, 68(12): 2349-2352.

DOI：10.1016/j.jpcs.2007.07.015

• ceramics
• electronic materials
• chemical synthesis
• neutron scattering
• microstructure

Nanocrystalline alumina powder was produced from calcinations of Al-13-oxal ate precipitates at 1100 degrees C. A nearly normal distribution of agglomerated alumina powder was obtained with an average particle size of about I pm. XRD measurement confirmed that the alumina produced was of high purity and crystalline g-phase. Microstructural features of both the precipitates and alumina obtained were studied using the small angle neutron scattering (SANS) technique. SANS examinations show the formation of microstructures in the alumina powder of mass fractals type with dimension of similar to 2.8 indicative of low intra-granular porosity.

• 出版日期2007-12