Journal of Materials Science

, Volume 26, Issue 2, pp 417–422 | Cite as

Effects of additives on sintering and some properties of calcium phosphates with various Ca/P ratios

  • Takafumi Kanazawa
  • Takao Umegaki
  • Kimihiro Yamashita
  • Hideki Monma
  • Tatsushi Hiramatsu
Papers

Abstract

The effects were studied of additives on the sintering and properties such as the compressive strength and chemical durability of ceramics of calcium pyrophosphate, tricalcium phosphate and hydroxyapatite. In improving the compressive strength of these calcium phosphates, the effect of additives was found to be in the order Na2O≫CaF2>MgOg≫Al2O3, SiO2 for the case of single-doping, and was most marked in the combination of Na2O-MgO-Al2O3 for the complex addition. It was also found that the chemical durability of the calcium phosphates was improved greatly by using a single or complex additives.

Keywords

Polymer Calcium Phosphate SiO2 Al2O3 

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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • Takafumi Kanazawa
    • 1
  • Takao Umegaki
    • 1
  • Kimihiro Yamashita
    • 1
  • Hideki Monma
    • 2
  • Tatsushi Hiramatsu
    • 3
  1. 1.Department of Industrial Chemistry, Faculty of TechnologyTokyo Metropolitan UniversityTokyoJapan
  2. 2.National Institute for Research in Inorganic MaterialsIbarakiJapan
  3. 3.Nihon Cement Co. LtdTokyoJapan

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