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Preparation of needle‐like hydroxyapatite by homogeneous precipitation under hydrothermal conditions
Author(s) -
Fujishiro Yoshinobu,
Yabuki Hiroshi,
Kawamura Kunio,
Sato Tsugio,
Okuwaki Akitsugu
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280570409
Subject(s) - hydrothermal circulation , homogeneous , precipitation , chemical engineering , chemistry , materials science , crystal (programming language) , mineralogy , nuclear chemistry , physics , meteorology , engineering , thermodynamics , computer science , programming language
Preparation of hydroxyapatite was carried out by a homogeneous precipitation technique using hydrothermal reactions of Ca(EDTA) 2‐ and PO 4 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.