@article{oai:ir.kagoshima-u.ac.jp:00004552,
 author = {島田, 欣二 and SHIMADA, Kinji and 福重, 安雄 and FUKUSHIGE, Yasuo and 平田, 好洋 and HIRATA, Yoshihiro and 西牟田, 幸治 and NISHIMUTA, Koji},
 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 = {Amorphous monodispersed silica spheres with particle size smaller than 0.8 μm were synthesized from the system Si(OC_2H_5)_4-NH_3 (or amine derivative)-H_2O-C_2H_5OH (or n-C_3H_7OH) in the temperature range 1.5-20°C. Silica particles grew larger at lower reaction temperatures. A linear correlation was observed between concentration of ammonia in the range of 0.5-4.0mol/l and average particle size of the silica. Plots of particle size against the concentration of water showed a maximum at about 8mol/l. Under a constant concentration of amine derivative, the growth rate of silica particles increased in the following order; (C_2H_5)_3N<(CH_3)_3N<(C_2H_5)_2NH<(CH_3)_2NH<CH_3NH_2. The diameter of silica spheres decreased to 3/4 of its initial diameter by heating to 1000°C through a two step dehydratio process. A rainbow-colored precipitate, in which silica spheres were close-packed in an ordered array, was obtained by allowing the solution containing monodispersed silica spheres to stand at room temperature for 3 months.},
 pages = {53--59},
 title = {火山作用と関係ある無定形ケイ酸の性質とその応用的研究 : 第34報オパール状物質の合成 (その2)},
 volume = {26},
 year = {1984}
}