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Preparation and Thermal Expansion of Calcium Iron Zirconium Phosphates with the NaZr2(PO4)3 Structure
Ist Teil von
Inorganic materials, 2018, Vol.54 (6), p.591-595
Ort / Verlag
Moscow: Pleiades Publishing
Erscheinungsjahr
2018
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Ca
0.5(1 +
x
)
Zr
2–
x
Fe
x
(PO
4
)
3
phosphates have been synthesized by a sol–gel process. The individual compounds and solid solutions obtained crystallize in the NaZr
2
(PO
4
)
3
structure (trigonal symmetry, sp. gr.
R
3
¯
). Using high-temperature X-ray diffraction, we have determined their thermal expansion parameters in the temperature range from 25 to 800°C. With increasing
x
, the magnitudes of their linear thermal expansion coefficients and thermal expansion anisotropy decrease. Most of the synthesized phosphates can be rated as low-thermal-expansion compounds and can be regarded as materials capable of withstanding thermal “stress.”