1996 Fiscal Year Final Research Report Summary
Hyclration of phosphates and indutrial application of the hydration product
| Project/Area Number |
07305063
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 総合 |
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| Research Field |
無機工業化学
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| Research Institution | TOKYO METROPOLITAN UNIVERSITTY |
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Principal Investigator |
UMEGAKI Tokao Tokyo Met. Univ. , Eng. Prof., 工学部, 教授 (70087287)
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| Co-Investigator(Kenkyū-buntansha) |
TODA Yoshitomo Chiba Inst. Tech. , Eng. Prof., 工学部, 教授 (30083869)
SUZUKI Takashi Yamanashi Univ. , Eng. Prof., 工学部, 教授 (60020385)
MOUMA Hideki Kogakuin Uinv. , Eng. Prof., 工学部, 教授 (00265951)
YASUE Tomotsu Nihon Univ. , Sci. & Eng. Prof., 理工学部, 教授 (90059973)
ARAI Yasuo Nihon Univ. , Sci. & Eng. Prof., 理工学部, 教授 (20058887)
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| Project Period (FY) |
1995 – 1996
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| Keywords | phosphate / hydration / hydraulic hardened body / ion-exchange / electrolytically depositedanatite / pigment |
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| Research Abstract |
1) On preparation of hydraulic hardened bodies such as plaster and concretes, a lot of pores were inevitably introduced into the hardened bodies and consequently the bending strength decreased. In order to improve the defects described above, water-soluble organic polymers were added on preparation of hydraulic calcium phosphate bodies and bending strength of hydraulic calcium phosphate increased although the density did not increased remarkably.
2) As the starting materials of calcium phosphate hardened bodies, amorphous calcium phosphate was used and the effects of organic acids were investigated.
3) The effects of various cations which were important in bone physiology were examined on electrolytical crystallization of hydroxyapatite.
Ions of Pb and Cd were able to be removed using hydroxyapatite as ionexchangers.
5) Hydrates of Co and Ni phosphates were applied to paints, colors and pigments. Their color properties were found to be comparable as the ordinary paints although the preparative procedures were simple.
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