Details

Autor(en) / Beteiligte

• Pet’kov, V. I.
• Asabina, E. A.
• Shchelokov, I. A.

Titel

Thermal expansion of NASICON materials

Ist Teil von

• Inorganic materials, 2013-05, Vol.49 (5), p.502-506

Ort / Verlag

Dordrecht: SP MAIK Nauka/Interperiodica

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Our and others’ results on the thermal expansion of compounds and the crystal-chemical information about their structure have been used to properly select compositions of new NASICON materials with small thermal expansion and low thermal expansion anisotropy: M x M 1− x ′Ti 2 (PO 4 ) 3 (M and M′ are alkali metals, 0 ≤ x ≤ 1), M″FeTi(PO 4 ) 3 (M″ is an alkaline-earth metal), and Ca 0.5(1 + x ) Fe x Ti 2 − x (PO 4 ) 3 (0 ≤ x ≤ 1). Such materials have been synthesized through salt coprecipitation from aqueous solutions and their thermal expansion has been assessed by high-temperature X-ray diffraction. We have determined their unit-cell parameters as functions of temperature and correlated their thermal expansion parameters and composition. The K 0.5 Rb 0.5 Ti 2 (PO 4 ) 3 and Rb 0.8 Cs 0.2 Ti 2 (PO 4 ) 3 materials obtained combine small volumetric thermal expansion and near-zero thermal expansion anisotropy.