Synthesis and Characterization of α-Al2O3 Nanocrystalline Powders by Low Temperature Combustion Method
Nanocrystalline α-Al2O3 powders were synthesized by low temperature combustion technique using aluminum nitrate-urea reactive system. The relationship between the color of powders and the mass ratio of aluminum nitrate-to-urea was investigated. X-ray results showed presence of the well-crystallized α-Al2O3 after calcined at 1100oC for 2h with 2.5:1 mass ratio. The grain size of α-Al2O3 powders was calculated by Scherrer equation. TEM observation and Clouter N4 Plus measurement results showed that the particle size distributed from 20 nm to 70 nm.
Yansheng Yin and Xin Wang
W. G. Li "Synthesis and Characterization of α-Al2O3 Nanocrystalline Powders by Low Temperature Combustion Method", Advanced Materials Research, Vols. 79-82, pp. 569-572, 2009