Untersuchungen im System CaOP2O5SiO2

Trömel, Gerhard; Harkort, Hans-Joachim; Hotop, Werner

doi:10.1002/zaac.19482560501

Cited by 25 publications

(10 citation statements)

References 12 publications

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“…The thermal decomposition of dibasic calcium orthephosphate to ~/-Ca2P207 is apt to be rather complex depending on whether CaHPO4.2H20 or crystalline CaHPO~ is the starting material and whether the ambient atmosphere is dry or humid (8)(9)(10)(11). The transition temperature for the inversion of fl-Ca2P207 to ~-Ca2P20~ is given as 1140 ~ (16), 1270 ~ (17), 1130 ~ (18), and 1220 ~ (15). W h e n ~-CauP207 is fired at a somewhat higher temperature ~-Ca2P207 is produced.…”

Section: Journal Of the Electrochemical Societymentioning

confidence: 99%

Electronic Paramagnetic Resonance Study of the Thermal Decomposition of Dibasic Calcium Orthophosphate

Parodi¹,

Hickok²,

Segelken³

et al. 1965

J. Electrochem. Soc.

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Electronic paramagnetic resonance (EPR) spectra of trace quantities of Mn +2 in solid solution in CaHPO~.2H20, CaHPO4, 7-Ca2P207, fi-Ca2P2OT, and a-Ca2P~O7 are given. The utility of EPR in following phase changes is demonstrated. The transition from fl-Ca2P207 to a-Ca2P207 is established as occurring within the temperature range, 1171~ ~ The results of hydrothermal ex-) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 157.182.150.22 Downloaded on 2014-11-20 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 157.182.150.22 Downloaded on 2014-11-20 to IP

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Section: Journal Of the Electrochemical Societymentioning

confidence: 99%

Electronic Paramagnetic Resonance Study of the Thermal Decomposition of Dibasic Calcium Orthophosphate

Parodi¹,

Hickok²,

Segelken³

et al. 1965

J. Electrochem. Soc.

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“…This polymorphic form of TCP does not get overcooled, even in the course of quenching, and its presence can be detected only during high‐temperature XRD experiments. TCP melts congruently at 1810°C …”

Section: Introductionmentioning

confidence: 99%

Phase Relationships in the Tricalcium Phosphate—Cerium Phosphate System. Thermal behavior of Phases Present in the System

Matraszek

Szczygieł

2012

J. Am. Ceram. Soc.

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A diagram representing the phase relationships in the Ca3(PO4)2–CePO4 phosphate system has been developed on the basis of results obtained using thermal analysis (DTA/DSC/TG), X‐ray diffraction (XRD), and scanning electron microscopy (SEM/EDS) methods. One intermediate compound with formula Ca3Ce(PO4)3 occurs in the Ca3(PO4)2–CePO4 system at temperature exceeding 1275°C. The compound melts at 1833°C and has one structural form. In the system a solid solution, having the structure of low‐temperature form of calcium phosphate Ca3−3xCex(PO4)2−x (where x is a molar fraction of CePO4), exists. The temperature and concentration range of the solid solution has been determined. It has been shown that the Ca9Ce(PO4)7 phase should be understood as a limited solid solution with x = 0.25.

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“…The phosphate was prepared in a solid state by the ceramic method according to method proposed in [42]. In this synthesis route, a stoichiometric mixture of CaCO 3 4 . The chemical composition of samples under study is shown in the Tab.…”

Section: Synthesismentioning

confidence: 99%

“…The temperature and composition of eutectic points, as well as the melting point of Ca 3 Y(PO 4 ) 3 have been adopted from [34]. The melting point of Ca 3 (PO 4 ) 2 has been taken from [3].…”

Section: Thermal Behavior Of Ca 3 Y(po 4 )mentioning

confidence: 99%

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The revised phase diagram of the Ca3(PO4)2–YPO4 system. The temperature and concentration range of solid-solution phase fields

Matraszek

Radomińska

2014

J Therm Anal Calorim

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A revised version of the Ca 3 (PO 4 ) 2 -YPO 4 phase diagram has been proposed on the basis of results obtained by thermal analysis (DTA/DSC/TG) and X-ray diffraction methods. A limited solid solution with the structure of b-Ca 3 (PO 4 ) 2 exists in the system. At 1,100°C the maximal concentration of YPO 4 in the solid solution is *15 mass%. The solid-solution phase field exists in the temperature range upto *1,380°C. Two high-temperature solid solutions with the structure of a 0 and a-Ca 3 (PO 4 ) 2 form in system as well, however only the a phase can be obtained by quenching from high temperatures. The Ca 3 Y(PO 4 ) 3 compound with the structure of eulytite forms in the Ca 3 (PO 4 ) 2 -YPO 4 system at temperatures exceeding 1,255°C and does not show any polymorphic transition.

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Untersuchungen im System CaOP₂O₅SiO₂

Cited by 25 publications

References 12 publications

Electronic Paramagnetic Resonance Study of the Thermal Decomposition of Dibasic Calcium Orthophosphate

Electronic Paramagnetic Resonance Study of the Thermal Decomposition of Dibasic Calcium Orthophosphate

Phase Relationships in the Tricalcium Phosphate—Cerium Phosphate System. Thermal behavior of Phases Present in the System

The revised phase diagram of the Ca3(PO4)2–YPO4 system. The temperature and concentration range of solid-solution phase fields

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