The revised phase diagram of the Ca_3(PO_4)_2-YPO_4 system. The temperature and concentration range of solid-solution phase fields

Aleksandra Matraszek; Ewa Radomińska

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The revised phase diagram of the Ca_3(PO_4)_2-YPO_4 system. The temperature and concentration range of solid-solution phase fields

机译：The revised phase diagram of the Ca_3(PO_4)_2-YPO_4 system. The temperature and concentration range of solid-solution phase fields

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摘要

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 β-Ca_3(PO_4)_2 exists in the system. At 1,100 ℃ 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 ℃. Two high-temperature solid solutions with the structure of α' and α-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_3Y(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 ℃ and does not show any polymorphic transition.

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来源
《Journal of thermal analysis and calorimetry》 |2014年第1期|101-108|共8页
作者
Aleksandra Matraszek; Ewa Radomińska;
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作者单位

Department of Inorganic Chemistry, Faculty of Engineering and Economics, Wroc?aw University of Economics, Komandorska 118/120, 53-345 Wroc?aw, Poland;

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正文语种英语
中图分类物理化学（理论化学）、化学物理学;
关键词
Calcium phosphate; Rare earth compounds; Phase diagram; Thermal analysis; X-ray diffraction;

The revised phase diagram of the Ca_3(PO_4)_2-YPO_4 system. The temperature and concentration range of solid-solution phase fields

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