Synthesis of Submicron Са3–хNa2х(PO4)2 Substituted Calcium Phosphate Powders in a Nonaqueous Medium for Stereolithographic Fabrication of Bioceramics

Larionov, D.S.; Evdokimov, P.V.; Garshev, A.V.; Kozlov, D.A.; Putlyaev, V.I.

Авторы: Larionov D.S., Evdokimov P.V., Garshev A.V., Kozlov D.A., Putlyaev V.I.
Журнал: Inorganic Materials
Том: 57
Номер: 9
Год издания: 2021
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 958
Последняя страница: 966
DOI: 10.1134/s0020168521090107
Аннотация: This paper compares the synthesis of tricalcium phosphate (TCP) (β-Са3(РО4)2) and Са3–хNa2х(PO4)2 substituted calcium phosphates (x = 0.5 and 1: solid solution A and β-CaNaPO4 sodium rhenanite, respectively) via precipitation and by a sol–gel process in ethylene glycol (EG). We have determined the phase composition of the synthesized phosphate powders and studied their micromorphology. Slow addition of ammonium (di)hydrogen phosphate to calcium ethylene glycolate at temperatures above 110°C leads to precipitation of crystalline β-TCP (with an average particle size under 200 nm) from the solution. In the synthesis of sodium calcium substituted phosphates, solvolysis of the sodium phosphates prevents congruent precipitation and requires correction of solution composition. The powder precipitated from a solution of sodium ethylate and calcium ethylene glycolate in EG (molar ratio above 2) crystallizes at 800°C in the rhenanite structure (particle size under 500 nm). In sol–gel synthesis, triethyl phosphate (TEP) was used as a phosphate component. For gelation, we used TEP solvolysis in EG and the formation of ester polymers as a result of reaction between citric acid and EG (Pechini process). The gel thermolysis products obtained between 600 and 800°C contained considerable amounts of residual carbon. The particle size characteristics and sinterability of the calcium phosphate powders precipitated from solutions in EG allow them to be used for filling photosuspensions that are employed in the fabrication of osteoconductive bioceramics with the use of stereolithographic 3D printing.
Добавил в систему: Козлов Даниил Андреевич

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Synthesis of Submicron Са3–хNa2х(PO4)2 Substituted Calcium Phosphate Powders in a Nonaqueous Medium for Stereolithographic Fabrication of Bioceramicsстатья

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