| Project/Area Number |
62850140
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
KANAZAWA Takafumi Faculty of Technology,, 工学部, 教授 (60087286)
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| Co-Investigator(Kenkyū-buntansha) |
井川 一成 東ソー化学研究所, 室長
CHIKAZAWA Masatoshi Faculty of Technology,, 工学部, 教授 (90087289)
INOUE Hiroyuki Faculty of Technology,, 工学部, 助手 (10193608)
YAMASHITA Kimihiro Faculty of Technology,, 工学部, 助手 (70174670)
UMEGAKI Takao Faculty of Technology,, 工学部, 助教授 (70087287)
IKAWA Kazunari To So
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1988: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1987: ¥5,100,000 (Direct Cost: ¥5,100,000)
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| Keywords | Hydroxyanatite / Crystal Growth / pH-stat / Zirconia / CaF_2 / pHスタット |
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| Research Abstract |
The crystal growth of hydroxyapatite on seed crystals of various ceramic powder was controlled by the constant composition method, which was developed by G.H. Nancollas for the purpose of measurement for growth rates of sparingly soluble calcium phosphate crystals. For the purpose of preparation of calcium-phosphate-and ceramic composite powder, calcium salts such as calcium fluoride, calcite and brushite were used for seed crystals while apatites were crystallized on zerconia and alumina. Under the conditions of high oversaturation to hydroxyapatite, octacalcium phosphate formed in crystallized apatites on zircoia. Fluorine-bearing apatites were obtained on calcium fluoride and fluorine-containg zirconia prepared by immersion of KF solution. The presence of fluorine may restrain contamination of octacalcium phosphate on crystallization of apaties. No apatite was obtained on brushite or calcite.
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