@article{oai:ir.kagoshima-u.ac.jp:00012692,
 author = {藤吉, 一誠 and FUJIYOSHI, Issei},
 journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University},
 month = {Nov},
 note = {Nickel adsorbed on porous vycor glass was reduced by hydrogen in order to prepare a supported nickel catalvst. The effect of hydrogen reduction on dispersion was investigated by the measurement of hydrogen uptake and by the measurement of BET surface area, and by the observation of TEM micrographs. TEM observation showed that mean crystallite size was about 5 nm below 773 K, over 8 nm above 873 K after 20 hours. The mechanisms of sintering appeared to be crystallite migration below 773 K, atomic migration above 873 K. Crystallite sintering was fast enough to affect dispersion above 873 K. The dispersion and BET surface area decreased simultaneously during hydrogen reduction. This effect was notable at a higher temperature. It is believed that the viscous support flow is peculiar to glass buried crystallite at an elevated temperature. The mean crystallite size by the chemisorption method did not always agree with that employed by the TEM method, because the results of the chemisorption method included a few unestablished factors, such as the extent of reduction, the degree of burial and the shape of the crystallite.},
 pages = {105--110},
 title = {多孔質ガラスに担持したニッケルの分散度におよぼす還元焼成の影響},
 volume = {31},
 year = {1989}
}