Amorphous calcium phosphate materials: Formation, structure and thermal behaviour

Research output: Contribution to journalArticleScientificpeer-review


  • Jana Vecstaudza
  • Michael Gasik
  • Janis Locs

Research units

  • Riga Technical University


Amorphous calcium phosphate (ACP) is essential in formation of mineralized bone and using as a bone substitute. This study presents new aspects of carbonated ACP crystallization during heat treatment. Initially synthesis end pH and drying method (80 °C or freeze-drying) of ACP were varied. Thermal behaviour and structure of differently obtained ACP were evaluated using DSC-TGA, heating microscopy, XRD, FT-IR. In addition, degree of crystallinity (DOC), phase composition and chemical group information were compared for as-synthesized and heat-treated (crystallization end T and 1200 °C) ACP. For the first time DSC-TGA and heating microscopy methods were correlated. DOC of samples dried at 80 °C was synthesis end pH dependent. Heat treatment without temperature hold at crystallization end T produced materials with DOC of 82–91%, thus proving efficiency of low temperature processing. Variations in drying method and synthesis end pH affect structure of the samples heat treated at crystallization end T, but not at 1200 °C.


Original languageEnglish
Pages (from-to)1642-1649
Number of pages8
JournalJournal of the European Ceramic Society
Issue number4
Publication statusPublished - 1 Apr 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Amorphous calcium phosphate, Crystallization, Degree of crystallinity, Nanoparticles, Thermal analysis

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