Preparation of needle‐like hydroxyapatite by homogeneous precipitation under hydrothermal conditions

Yoshinobu Fujishiro; Hiroshi Yabuki; Kunio Kawamura; Tsugio Sato; Akitsugu Okuwaki

doi:10.1002/jctb.280570409

Preparation of needle‐like hydroxyapatite by homogeneous precipitation under hydrothermal conditions

Yoshinobu Fujishiro, Hiroshi Yabuki, Kunio Kawamura, Tsugio Sato, Akitsugu Okuwaki

Center for Exploration of New Inorganic Materials

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

Preparation of hydroxyapatite was carried out by a homogeneous precipitation technique using hydrothermal reactions of Ca(EDTA)^2‐ and PO₄ ^3‐ at 130–250°C and pH 4–10. Hydroxyapatite and monetite were formed above pH 6 and below pH 4, respectively. Needle‐like hydroxyapatite was formed at high temperatures above 130°C. The length of the needle‐like hydroxyapatite crystal increased with increasing working solution pH and temperature.

Original language	English
Pages (from-to)	349-353
Number of pages	5
Journal	Journal of Chemical Technology & Biotechnology
Volume	57
Issue number	4
DOIs	https://doi.org/10.1002/jctb.280570409
Publication status	Published - 1993 Jan 1

Keywords

calcium‐EDTA chelate
homogeneous precipitation
hydrothermal reaction
hydroxyapatite
needle‐like crystal

ASJC Scopus subject areas

Biotechnology
Chemical Engineering(all)
Renewable Energy, Sustainability and the Environment
Fuel Technology
Waste Management and Disposal
Pollution
Organic Chemistry
Inorganic Chemistry

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abstract = "Preparation of hydroxyapatite was carried out by a homogeneous precipitation technique using hydrothermal reactions of Ca(EDTA)2‐ and PO4 3‐ at 130–250°C and pH 4–10. Hydroxyapatite and monetite were formed above pH 6 and below pH 4, respectively. Needle‐like hydroxyapatite was formed at high temperatures above 130°C. The length of the needle‐like hydroxyapatite crystal increased with increasing working solution pH and temperature.",

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AU - Fujishiro, Yoshinobu

AU - Yabuki, Hiroshi

AU - Kawamura, Kunio

AU - Sato, Tsugio

AU - Okuwaki, Akitsugu

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