Correlation between Crystal Structure and Thermoelectric Properties of Sr1−xTi0.9Nb0.1O3−δ Ceramics
| العنوان: | Correlation between Crystal Structure and Thermoelectric Properties of Sr1−xTi0.9Nb0.1O3−δ Ceramics |
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| المؤلفون: | J. A. Alonso, Carlos López, Norbert M. Nemes, Jesús Prado-Gonjal, Federico Serrano-Sánchez, José-Luis Martínez, M. T. Fernández-Díaz, R. M. Pinacca, Oscar J. Dura |
| المساهمون: | Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), Agencia Estatal de Investigación (España), Comunidad de Madrid, Universidad Complutense de Madrid |
| المصدر: | E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid Digital.CSIC. Repositorio Institucional del CSIC instname Crystals, Vol 10, Iss 2, p 100 (2020) E-Prints Complutense. Archivo Institucional de la UCM Crystals Volume 10 Issue 2 CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET 'Crystals ', vol: 10, pages: 100-1-100-13 (2020) |
| بيانات النشر: | MDPI, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Ceramics, Materials science, Phonon, General Chemical Engineering, Neutron diffraction, Analytical chemistry, 02 engineering and technology, ceramics, 010402 general chemistry, Perovskite, 01 natural sciences, oxygen vacancies, purl.org/becyt/ford/1 [https], Inorganic Chemistry, chemistry.chemical_compound, Thermal conductivity, neutron diffraction, Thermoelectric effect, purl.org/becyt/ford/1.4 [https], lcsh:QD901-999, General Materials Science, strontium titanate, perovskite, Perovskite (structure), Física de materiales, thermoelectric materials, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Thermoelectric materials, Anisotropic displacement parameters, Química inorgánica, 0104 chemical sciences, chemistry, Oxygen vacancies, anisotropic displacement parameters, Strontium titanate, Crystallite, lcsh:Crystallography, 0210 nano-technology |
| الوصف: | Polycrystalline Sr1&minus xTi0.9Nb0.1O3&minus &delta (x = 0, 0.1, 0.2) ceramics have been prepared by the solid state method and their structural and thermoelectric properties have been studied by neutron powder diffraction (NPD), thermal, and transport measurements. The structural analysis of Sr1-xTi0.9Nb0.1O3&minus (x = 0.1, 0.2) confirms the presence of a significant amount of oxygen vacancies, associated with the Sr-deficiency of the materials. The analysis of the anisotropic displacement parameters (ADPs) indicates a strong softening of the overall phonon modes for these samples, which is confirmed by the extremely low thermal conductivity value (&kappa &asymp 1.6 W m-1 K&minus 1 at 823 K) found for Sr1&minus (x = 0.1, 0.2). This approach of introducing A-site cation vacancies for decreasing the thermal conductivity seems more effective than the classical substitution of strontium by rare-earth elements in SrTiO3 and opens a new optimization scheme for the thermoelectric properties of oxides. |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c70bc9afc60ff411de0b0561023ec9b2 https://eprints.ucm.es/id/eprint/66269/1/crystals-10-00100-v2.pdf |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c70bc9afc60ff411de0b0561023ec9b2 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |