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Ceramics 2018, 1(2), 375-392; https://doi.org/10.3390/ceramics1020030

Calcium Phosphate Powder Synthesized from Calcium Acetate and Ammonium Hydrophosphate for Bioceramics Application

1
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1, Moscow 119991, Russia
2
Materials Science Department, Lomonosov Moscow State University, Leninskie Gory, 1, Moscow 119991, Russia
3
Research Institute of Mechanics, Lomonosov Moscow State University, Michurinskii pr., 1, Moscow 119192, Russia
*
Author to whom correspondence should be addressed.
Received: 25 October 2018 / Revised: 7 December 2018 / Accepted: 11 December 2018 / Published: 15 December 2018
(This article belongs to the Special Issue Ceramics for Biomedical Applications)
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Abstract

Calcium phosphate powder was synthesized at room temperature from aqueous solutions of ammonium hydrophosphate and calcium acetate without pH adjusting at constant Ca/P molar ratio 1.5. Phase composition of the as-synthesized powder depended on the precursors concentration: At 2.0 M of calcium acetate in the starting solution, poorly crystallized hydroxyapatite was formed, 0.125 M solution of calcium acetate afforded brushite, and the powders synthesized from 0.25–1.0 M calcium acetate solutions were mixtures of the mentioned phases. Firing at 1100 °C led to complete elimination of the reaction by-products, yet the phase composition of the annealed compacted samples was the following: When 2.0 M solution of calcium acetate was used, the obtained ceramics consisted of β-Ca3(PO4)2, whereas at 0.125 to 1.0 M of calcium acetate, the ceramics was a mixture of β-Ca3(PO4)2 and β-Ca2P2O7. Synthesized calcium phosphate powders can be used as the powdered precursors for biocompatible bioresorbable composite ceramics production. View Full-Text
Keywords: hydroxyapatite; brushite; precipitation; tricalcium phosphate; calcium pyrophosphate; ceramic composite hydroxyapatite; brushite; precipitation; tricalcium phosphate; calcium pyrophosphate; ceramic composite
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Safronova, T.; Putlayev, V.; Filippov, Y.; Shatalova, T.; Karpushkin, E.; Larionov, D.; Kazakova, G.; Shakhtarin, Y. Calcium Phosphate Powder Synthesized from Calcium Acetate and Ammonium Hydrophosphate for Bioceramics Application. Ceramics 2018, 1, 375-392.

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