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Particle Size Control and Characteristics Analysis of Nanosized γ-Alumina Powders
Oh, SeWoong
43862
Noda, Hiroyuki
43863
Kim, Heejoon
43864
Al203
Thermal CVD method
AlCl3(Trichloroaluminum)
Nanosized Al203 particles were synthesized using the thermal CVD (Chemical Vapor Deposition) method.-AlCl3 (Trichloroaluminum) was used as the starting material. The relationships between, particle sizi and reaction temperature, and concentration and pressure were investigated. In the preparation of nanosized Al203 particles, the typical γ-Al203 crystalline phases appeared above 1273 K. The particle size decreases from 8.2 nm to 3.7 nm with reaction pressure in the range of 101 kPa to 42.5 kPa. We obtained the smallest average particle size of 3.7 nm with geometric standard deviation of 0.8 nm. TEM observation shows that particles are spherical in shape. The size was also found to decrease from 8.9 nm to 6.1 nm when the reaction temperature was increased from 873 to 1273 K in an AlCl3 concentration of 0.014 mol%. The uniformity of Al203 particles increased and decreased AlCl3 concentrations and reaction pressure.
journal article
日本セラミックス協会
2004-05
application/pdf
日本セラミックス協会学術論文誌
PacRim5 Special Issue
112
S933
S935
Journal of the Ceramic Society of Japan, Supplement
AN10040326
0914-5400
1349-2756
https://niigata-u.repo.nii.ac.jp/record/3593/files/112_5_S933-S935.pdf
eng
https://doi.org/10.14852/jcersjsuppl.112.0.S933.0
Copyright(C)2004 日本セラミックス協会