Fast preparation route to high-performances textured Sr-doped Ca3Co4O9 thermoelectric materials through precursor powder modification
| Autor: | M. A. Torres, J. C. Diez, Andres Sotelo, I. Urrutibeascoa, M. A. Madre, Gustavo Garcia |
|---|---|
| Přispěvatelé: | Gobierno de Aragón, Agencia Estatal de Investigación (España), European Commission, Eusko Jaurlaritza, Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2019 |
| Předmět: |
Ceramics
Materials science Doping Hot-pressing Oxides 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure Thermoelectric materials Hot pressing 01 natural sciences 0104 chemical sciences Chemical engineering Electrical resistivity and conductivity Seebeck coefficient visual_art visual_art.visual_art_medium Electrical properties Power factor General Materials Science Ceramic 0210 nano-technology Porosity |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | This work presents a short and very efficient method to produce high performance textured Ca3Co4O9 thermoelectric materials through initial powders modification. Microstructure has shown good grain orientation, and low porosity while slightly lower grain sizes were obtained in samples prepared from attrition milled powders. All samples show the high density of around 96% of the theoretical value. These similar characteristics are reflected in, approximately, the same electrical resistivity and Seebeck coefficient values for both types of samples. However, in spite of similar power factor (PF) at low temperatures, it is slightly higher at high temperature for the attrition milled samples. On the other hand, the processing time reduction (from 38 to 2 h) when using attrition milled precursors, leads to lower mechanical properties in these samples. All these data clearly point out to the similar characteristics of both kinds of samples, with a drastic processing time decrease when using attrition milled precursors, which is of the main economic importance when considering their industrial production. The authors thank the Gobierno de Aragón- FEDER (Research Group T 54–17 R), the Spanish MINECO-FEDER (MAT2017-82183-C3-1-R), and Basque Government Industry Department through the Elkartek program (Exp: KK-2017/00099-HiTOM) for financial support. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|