Ca2P2O7–Ca(PO3)2 Ceramic Obtained by Firing β-Tricalcium Phosphate and Monocalcium Phosphate Monohydrate Based Cement Stone

Сафронова, Т. В.; Korneichuk, S. A.; Шаталова, Т. Б.; Lukina, Yu. S.; Sivkov, S. P.; Filippov, Ya. Yu.; Крутько, В. К.; Musskaya, O. N.

doi:10.1007/s10717-020-00263-y

Cited by 10 publications

(4 citation statements)

References 29 publications

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“…TSP has been enormously used in agriculture all over the world, causing the phosphate rock reserves to deplete and prices increased by 300% . Recently, TSPs have also been utilized to reduce the acidity of tropical acid soil, alleviate arsenic toxicity in rice, phytostabilize Pb–Zn mine tailings, cultivate Chlorella pyrenoidosa, grow bermudagrass, produce white oyster mushroom (Pleurotus ostreatus), sustain soil fertility and improve nodulation, produce ceramics, − produce hardening composite materials, and produce bioactive composite bone cements . Other TSP studies include improving phosphate solubility in soil using Trichoderma spp., preparation of slow-release TSP fertilizers, , and investigation of the potential to breed for maize hybrids under reduced P starter fertilizer .…”

Section: Introductionmentioning

confidence: 99%

Composition and Properties of Triple Superphosphate Obtained from Oyster Shells and Various Concentrations of Phosphoric Acid

et al. 2021

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Triple superphosphates [TSPs, Ca(H 2 PO 4 ) 2 ·H 2 O] were produced by exothermic reactions of oyster shells and different concentrations of phosphoric acid (10, 20, 30, 40, 50, 60, and 70% w/w) in a molar ratio of 1:2. The percentage yields, P 2 O 5 and CaO contents, metal impurities, and thermal behaviors of all the as-prepared products are dependent on the concentrations of phosphoric acid added during the production processes, which confirm to get the best optimum of 60% w/w phosphoric acid. All the as-prepared products were characterized by several characterization methods [X-ray fluorescence, thermal gravimetric/derivative thermal gravimetric analysis, powder X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy], verifying that all the obtained compounds are TSP that can be used as fertilizers without metal toxic contaminants. From the successful results, the method for TSP production can be applied in the fertilizer industry based on starting waste materials of oyster shells that can replace the use of unsustainable phosphate or calcium minerals obtained from nonliving things.

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Section: Introductionmentioning

confidence: 99%

Composition and Properties of Triple Superphosphate Obtained from Oyster Shells and Various Concentrations of Phosphoric Acid

et al. 2021

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“…Liquid phase sintering can be realized when the sintering additive is presented in a quantity of a wide interval from 1% to 40%. Sodium phosphates [22,23], sodium carbonate [24], sodium/potassium nitrates [25], and calcium polyphosphate [9,26,27] were used as sintering additives for calcium pyrophosphate ceramic preparation. Potassium carbonate [28,29], potassium chloride [30], and calcium chloride [31] used as sintering additives for ceramic based on hydroxyapatite can also be used as sintering additives for calcium pyrophosphate ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…Potassium carbonate [28,29], potassium chloride [30], and calcium chloride [31] used as sintering additives for ceramic based on hydroxyapatite can also be used as sintering additives for calcium pyrophosphate ceramics. It should be noted, that in investigations [26,27], calcium polyphosphate was introduced in preceramic samples prepared as cement stone via excess of monocalcium phosphate monohydrate. Application of low temperature melting salts with biocompatible cations such as potassium or sodium has a slight disadvantage, which consists in the possibility of the drift of phase composition of bioceramics to the oxide systems Na 2 O-CaO-P 2 O 5 or K 2 O-CaO-P 2 O 5 and the formation of phases of double phosphates due to heterophase reactions.…”

Section: Introductionmentioning

confidence: 99%

Bioceramics Based on β-Calcium Pyrophosphate

et al. 2022

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Ceramic samples based on β-calcium pyrophosphate β-Ca2P2O7 were prepared from powders of γ-calcium pyrophosphate γ-Ca2P2O7 with preset molar ratios Ca/P = 1, 0.975 and 0.95 using firing at 900, 1000, and 1100 °C. Calcium lactate pentahydrate Ca(C3H5O3)2⋅5H2O and monocalcium phosphate monohydrate Ca(H2PO4)2⋅H2O were treated in an aqua medium in mechanical activation conditions to prepare powder mixtures with preset molar ratios Ca/P containing calcium hydrophosphates with Ca/P = 1 (precursors of calcium pyrophosphate Ca2P2O7). These powder mixtures containing calcium hydrophosphates with Ca/P = 1 and non-reacted starting salts were heat-treated at 600 °C after drying and disaggregation in acetone. Phase composition of all powder mixtures after heat treatment at 600 °C was presented by γ-calcium pyrophosphate γ-Ca2P2O7 according to the XRD data. The addition of more excess of monocalcium phosphate monohydrate Ca(H2PO4)2·H2O (with appropriate molar ratio of Ca/P = 1) to the mixture of starting components resulted in lower dimensions of γ-calcium pyrophosphate (γ-Ca2P2O7) individual particles. The grain size of ceramics increased both with the growth in firing temperature and with decreasing molar ratio Ca/P of powder mixtures. Calcium polyphosphate (t melt = 984 °C), formed from monocalcium phosphate monohydrate Ca(H2PO4)2⋅H2O, acted similar to a liquid phase sintering additive. It was confirmed by tests in vitro that prepared ceramic materials with preset molar ratios Ca/P = 1, 0.975, and 0.95 and phase composition presented by β-calcium pyrophosphate β-Ca2P2O7 were biocompatible and could maintain bone cells proliferation.

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“…Liquid phase sintering can be realized when the sintering additive is presented in a quantity of a wide interval from 1% to 40%. Sodium phosphates [ 22 , 23 ], sodium carbonates [ 24 ], sodium/potassium nitrate [ 25 ], and calcium polyphosphate [ 9 Telic, 26 , 27 ] were used as sintering additives for calcium pyrophosphate ceramic preparation. Potassium carbonate [ 28 , 29 ], potassium chloride [ 30 ], and calcium chloride [ 31 ] used as sintering additives for ceramic based on hydroxyapatite can also be used as sintering additives for calcium pyrophosphate ceramics.…”

Section: Introductionmentioning

confidence: 99%

Bioceramics Based on Calcium Pyrophosphate

Сафронова¹,

Киселев²,

Селезнева³

et al. 2022

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Ceramic samples based on b-calcium pyrophosphate b-Ca2P2O7 were prepared using firing at 900, 1000, and 1100 oC from powders of g-calcium pyrophosphate g-Ca2P2O7 with preset molar ratios Ca/P=1; 0,975 and 0,95. To prepare powders of g-calcium pyrophosphate g-Ca2P2O7 with preset molar ratio Ca/P=1; 0,975 and 0,95 powder mixtures based on calcium lactate pentahydrate Ca(C3H5O3)2⋅5H2O and, monocalcium phosphate monohydrate Ca(H2PO4)2⋅H2O were treated in an aqua medium in mechanical activation conditions, dried, disaggregated in acetone, and heat-treated at 600 oC. The phase composition of powder mixtures after treatment if planetary mill in aqua medium included both brushite CaHPO4⋅2H2O or monetite CaHPO4, and starting salts. The phase composition of all powder mixtures after disaggregation in acetone in planetary mill included monetite CaHPO4 and starting salts. After heat treatment at 600 oC according to the XRD data phase composition of all powder mixtures was presented by g-calcium pyrophosphate g-Ca2P2O7. The grain size of ceramics increased both with the growth of firing temperature and with decreasing of molar ratio Ca/P of powder mixtures. Calcium polyphosphate (t melt =960–968 oC) formed from monocalcium phosphate monohydrate Ca(H2PO4)2⋅H2O acted like a liquid phase sintering additive. It was confirmed by tests in vitro, that prepared ceramic materials with preset molar ratio Ca/P=1; 0,975 and 0,95 and phase composition presented by b-calcium pyrophosphate b-Ca2P2O7 according to XRD data were biocompatible and could maintain bone cells proliferation.

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Ca2P2O7–Ca(PO3)2 Ceramic Obtained by Firing β-Tricalcium Phosphate and Monocalcium Phosphate Monohydrate Based Cement Stone

Cited by 10 publications

References 29 publications

Composition and Properties of Triple Superphosphate Obtained from Oyster Shells and Various Concentrations of Phosphoric Acid

Composition and Properties of Triple Superphosphate Obtained from Oyster Shells and Various Concentrations of Phosphoric Acid

Bioceramics Based on β-Calcium Pyrophosphate

Bioceramics Based on Calcium Pyrophosphate

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