Synthesis, Structure and Thermophysical Properties of Phosphates MNi0.5Zr1.5(PO4)3 (M = Mg, Ca, Sr)

Authors

  • M. V. Sukhanov Lobachevsky State University of Nizhni Novgorod, pr. Gagarina, 23, Nizhni Novgorod, 603950, Russia
  • I. A. Schelokov Lobachevsky State University of Nizhni Novgorod, pr. Gagarina, 23, Nizhni Novgorod, 603950, Russia
  • V. I. Petkov Lobachevsky State University of Nizhni Novgorod, pr. Gagarina, 23, Nizhni Novgorod, 603950, Russia
  • E. R. Gobechiya Lomonosov Moscow State University, Leninskie gory, Moscow, 119992, Russia
  • Yu. K. Kabalov Lomonosov Moscow State University, Leninskie gory, Moscow, 119992, Russia
  • A. V. Markin Lobachevsky State University of Nizhni Novgorod, pr. Gagarina, 23, Nizhni Novgorod, 603950, Russia
  • N. N. Smirnova Lobachevsky State University of Nizhni Novgorod, pr. Gagarina, 23, Nizhni Novgorod, 603950, Russia

DOI:

https://doi.org/10.18321/ectj51

Abstract

New phosphates MNi0.5Zr1.5(PO4)3 (M = Mg, Ca, Sr) were prepared by the precipitating method. Phosphates were characterized using X-ray powder diffraction, IR-spectroscopy and electron microprobe analyses. The crystal structure of phosphates was refined by the Rietveld method. Phosphates CaNi0.5Zr1.5(PO4)3 and SrNi0.5Zr1.5(PO4)3 are shown to have been crystallized in the NaZr2(PO4)3-type structure and the phosphate MgNi0.5Zr1.5(PO4)3 was obtained as a single-phase with Sc2(WO4)3-type structure. Heat capacity of phosphate CaNi0.5Zr1.5(PO4)3 was measured in the range 7 – 650 K and increased monotonically over the entire temperature range studied. Thermal expansion of phosphate CaNi0.5Zr1.5(PO4)3 was studied in the interval 295-1073 K by the high temperature X-ray diffraction. This phosphate is similar to the best low-expansion ceramics, such as zircon, cordierite and silica glass in thermal expansion behavior.

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Published

2010-11-15

How to Cite

Sukhanov, M. V., Schelokov, I. A., Petkov, V. I., Gobechiya, E. R., Kabalov, Y. K., Markin, A. V., & Smirnova, N. N. (2010). Synthesis, Structure and Thermophysical Properties of Phosphates MNi0.5Zr1.5(PO4)3 (M = Mg, Ca, Sr). Eurasian Chemico-Technological Journal, 12(3-4), 241–245. https://doi.org/10.18321/ectj51

Issue

Vol. 12 No. 3-4 (2010)

Section

Articles

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