Phase transitions in bismuth pyrostannate upon substitution of tin by iron ions
Autor: | S S Aplesnin, M. N. Sitnikov, L. V. Udod, M.N. Molokeev, O. B. Romanova |
---|---|
Rok vydání: | 2019 |
Předmět: |
Phase transition
Materials science Mechanical Engineering Metals and Alloys chemistry.chemical_element Infrared spectroscopy 02 engineering and technology Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Thermal expansion 0104 chemical sciences Bismuth Ion chemistry Mechanics of Materials Phase (matter) Materials Chemistry Physical chemistry 0210 nano-technology Tin |
Zdroj: | Journal of Alloys and Compounds. 804:281-287 |
ISSN: | 0925-8388 |
Popis: | The Bi2(Sn1-хFeх)2O7 (х = 0, 0.1, 0.2) compounds have been synthesized by the solid-state reaction technique. The structure of the synthesized compounds has been investigated in the temperature range of 80–500 K using the thermal expansion and ultrasound damping coefficients and IR spectroscopy. The shift -type structural transitions for the composition with х = 0.2 in the low-temperature region has been established. The effect of iron ions on the phase boundaries of the polymorphic transitions in the Bi2Sn2O7 compound has been observed. Softening of the phonon modes near the phase transitions at different iron concentrations has been found. |
Databáze: | OpenAIRE |
Externí odkaz: |