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Ceramics in the Ca2P2O7–Ca(PO3)2 System Obtained by Annealing of the Samples Made from Hardening Mixtures Based on Calcium Citrate Tetrahydrate and Monocalcium Phosphate Monohydrateстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 16 декабря 2020 г.
- Авторы: Safronova T.V., Shatalova T.B., Filippov Ya Yu, Krut’ko V.K., Musskaya O.N., Safronov A.S., Toshev O.U.
- Журнал: Inorganic Materials: Applied Research
- Том: 11
- Номер: 4
- Год издания: 2020
- Первая страница: 777
- Последняя страница: 786
- DOI: 10.1134/S2075113320040334
- Аннотация: Calcium phosphate ceramics in the Ca2P2O7–Ca(PO3)2 system was obtained by annealing ofhardened samples formed from highly loaded suspensions (HLS). HLSs included water and a homogenizedpowder mixture of calcium citrate tetrahydrate Ca3(C6H5O7)2 ⋅ 4H2O and monocalcium phosphate monohydrate Ca(H2PO4)2 ⋅ H2O. The latter was taken in the amount providing the molar ratio of Ca/P = 1 in the powder mixture, as well as at a molar ratio of Ca/P < 1 so that the excess of monocalcium phosphate monohydrate Ca(H2PO4)2 ⋅ H2O provided the formation of the calcium polyphosphate Ca(PO3)2 phase upon annealing. The samples were molded by extrusion of the HLS through a die with a diameter of 2 mm by sandwiching powder cords. After hardening and drying, the phase composition of all obtained samples included brushite CaHPO4 ⋅ 2H2O, monetite CaHPO4, monocalcium phosphate monohydrate Ca(H2PO4)2 · H2O, and octacalcium phosphate Ca8(HPO4)2(PO4)4H2O. According to the XRD data, the phase composition of all ceramic samples after annealing in a range of 800–1000°C included calcium β-pyrophosphate β-Ca2P2O7, and a ceramic sample obtained from a powder mixture with the highest excess of monocalcium phosphate monohydrate Ca(H2PO4)2 · H2O additionally included tromelite Ca4P6O19. Hardening HLSs containing water and a homogenized powder mixture of calcium citrate Ca3(C6H5O7)2 · 4H2O and monocalcium phosphate monohydrate Ca(H2PO4)2 · H2O can be used for layer-by-layer extrusion molding. The resulting calcium phosphate ceramics with lowered sintering temperature canbe used for the design of a resorbable matrices of tissue engineering constructs.Keywords: monocalcium phosphate monohydrate, calcium citrate tetrahydrate, highly loaded suspension,extrusion, brushite, monetite, octacalcium phosphate, layer-by-layer molding, phase transformations, calcium pyrophosphate, calcium polyphosphate, tromelite, liquid-phase sintering, ceramics
- Добавил в систему: Сафронова Татьяна Викторовна
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