Hydrothermal Synthesis of .BETA.-Tricalcium Phosphate from Amorphous Calcium Phosphate.

• TOYAMA Takeshi

  Department of Materials and Applied Chemistry, Faculty of Science and Engineering, Nihon University

• NAKASHIMA Kouichi

  Department of Materials and Applied Chemistry, Faculty of Science and Engineering, Nihon University

• YASUE Tamotsu

  Department of Materials and Applied Chemistry, Faculty of Science and Engineering, Nihon University

Bibliographic Information

Other Title

• 非晶質リン酸カルシウムを原料とするβ型リン酸三カルシウムの水熱合成
• Hydrothermal Synthesis of β-Tricalcium Phosphate from Amorphous Calcium Phosphate
• Hydrothermal Synthesis of ベータ Tricalcium Phosphate from Amorphous Calcium Phosphate

Abstract

β-tricalcium phosphate (β-TCP) is usually prepared by burning a mixture of dicalcium hydrogenphosphate anhydride (DCPA) and calcium carbonate (CaCO₃) above 1100°C. However, hydrothermal synthesis may be a more effective process for energy-saving. In addition, amorphous calcium phosphate (ACP) is very useful as a raw material for the morphological control of crystalline calcium phosphates. The present work investigated about the hydrothermal synthesis of β-TCP from ACP. ACP (Ca/P atomic ratio of 1.25-1.55) as starting material was obtained by a hydrolysis reaction of a calcium dihydrogenphosphate monohydrate (MCP) solution. Hydrothermal synthesis of β-TCP occurred under the following conditions: liquid/solid weight ratio, 30; carboxylic acid (formic acid, acetic acid, propionic acid, butyric acid and valeric acid) concentration, 0-1.5mol·dm^-3; temperature, 160-260°C; time, 0-72h. ACP crystallized into DCPA in hydrothermal conditions at 160°C, and was transformed into two phases, β-TCP and DCPA, above 200°C. Single-phase β-TCP formed at 220°C. Hydrothermal synthesis of β-TCP occurred under the following optimum conditions: formic acid solution, 1.0mol·dm^-3; temperature, 220°C; time, 3h. Ca/P atomic ratio of the hydrothermal synthesized β-TCP was 1.48±0.01 and the product was quantified as Ca_2.98(HPO₄)_0.04(PO₄)_1.96.

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 110 (1284), 716-721, 2002

  The Ceramic Society of Japan

Keywords

• β-tricalcium phosphate
• Amorphous calcium phosphate
• Hydrothermal synthesis
• Formic acid
• Carbon monoxide

Details

• CRID: 1390282680224464128
• NII Article ID: 110002291680
• NII Book ID: AN10040326
• DOI: 10.2109/jcersj.110.716
• ISSN: 18821022
• ISSN: 09145400
• NDL BIB ID: 6249282
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6249282
• Web Site: http://www.jstage.jst.go.jp/article/jcersj1988/110/1284/110_1284_716/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed