High-Temperature Studies of the Thermal Expansion of FeNb2O6
| Autor: | R. I. Gulyaeva, S. A. Petrova, V. M. Chumarev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Diffraction Materials science Solid-state physics Thermodynamics 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Thermal expansion Inorganic Chemistry Formalism (philosophy of mathematics) Third order 0103 physical sciences Materials Chemistry Orthorhombic crystal system Physical and Theoretical Chemistry 0210 nano-technology Anisotropy |
| Zdroj: | Journal of Structural Chemistry. 59:1989-1994 |
| ISSN: | 1573-8779 0022-4766 |
| Popis: | High-temperature X-ray diffraction is used to study structural changes and thermal expansion of the synthesized iron niobate sample FeNb2O6 of the orthorhombic modification. It is demonstrated that no phase transformations are observed in the temperature range 30–1230 °C; there are only anisotropic changes in unit cell parameters. The temperature dependences of the unit cell parameters are approximated by third order polynomials. Tensor coefficients of the thermal expansion are calculated based on the obtained data. The Schneider-Eberhard formalism is used for the quantitative estimation of thermal expansion anisotropy. |
| Databáze: | OpenAIRE |
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