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Publikācija: Synthesis of Amorphous Calcium Phosphate as a Starting Material for α-Tricalcium Phosphate

Publication Type Full-text conference paper published in conference proceedings indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Synthesis of Amorphous Calcium Phosphate as a Starting Material for α-Tricalcium Phosphate
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Zilgma Irbe
Armands Bušs
Dagnija Loča
Lāsma Mālniece
Keywords amorphous calcium phosphate, calcium phosphate, synthesis, α-tricalcium phosphate
Abstract α-Tricalcium phosphate (α-TCP) is an important reactive component in calcium phosphate bone cements which are used for the bone tissue regeneration and augmentation. By thermally treating amorphous calcium phosphate (ACP) at relatively low temperatures (650–900 °C), it is possible to obtain sub-micrometre or nanosized α-TCP particles. In the current research, it is shown that the aqueous synthesis environment where ACP is precipitated has significant influence on the stability of ACP and the α-TCP content in the thermally treated products. During ACP synthesis pH must be kept basic. While it is possible to synthesize ACP if potassium hydroxide or sodium hydroxide is used to raise the pH of synthesis, ammonium ions also must be present in the solution to obtain α-TCP after thermal treatment of ACP. If sodium hydroxide is used, higher α-TCP content is obtained (compare 89 % and 66 %). Increase of Ca/P ratio stabilizes ACP and allows to obtain products with high α-TCP content. Increase of both calcium and phosphate ion concentration in the synthesis destabilizes ACP and reduces the amount of α-TCP in the product (twofold increase reduced α-TCP content from 89% to 2%).
DOI: 10.4028/www.scientific.net/SSP.267.119
Hyperlink: https://www.scientific.net/SSP.267.119 
Reference Irbe, Z., Bušs, A., Loča, D., Mālniece, L. Synthesis of Amorphous Calcium Phosphate as a Starting Material for α-Tricalcium Phosphate. In: Solid State Phenomena, Lithuania, Kaunas, 26-27 October, 2017. Lietuva: Trans Tech Publications, 2017, pp.119-123. ISSN 1662-9779. Available from: doi:10.4028/www.scientific.net/SSP.267.119
Additional information Citation count:
  • Scopus  0
ID 26168