Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods
[Bi2Ba2O4]p[CoO2] thermoelectric ceramics have been successfully grown from the melt using the laser floating zone method, followed by a thermal treatment at 700°C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the therm...
| Authors: | ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2017 |
| Country: | España |
| Institution: | Universidad de Zaragoza |
| Repository: | Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| OAI Identifier: | oai:zaguan.unizar.es:61700 |
| Online Access: | http://zaguan.unizar.es/record/61700 |
| Access Level: | Open access |
| _version_ | 1878738435920887808 |
|---|---|
| author | Diez, J.C. |
| author2 | Madre, M.A. Torres, M.A. Rasekh, S. Sotelo, A. |
| author2_role | author author author author |
| author_browse | Diez, J.C. Madre, M.A. Rasekh, S. Sotelo, A. Torres, M.A. |
| author_facet | Diez, J.C. Madre, M.A. Torres, M.A. Rasekh, S. Sotelo, A. |
| author_role | author |
| collection | Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| description | [Bi2Ba2O4]p[CoO2] thermoelectric ceramics have been successfully grown from the melt using the laser floating zone method, followed by a thermal treatment at 700°C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the thermal treatment length. Microstructure has shown that as-grown samples are composed of thermoelectric grains, together with a relatively high amount of secondary phases. Thermal treatment decreased the number and amount of secondary phases, producing nearly single-phase samples after 384 h. Consequently, the thermoelectric properties evaluated through the power factor showed a slight increase with the thermal treatment length, mainly due to the decrease of electrical resistivity, while the Seebeck coefficient was nearly unchanged. On the other hand, flexural strength was practically constant after 24 h thermal treatment. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_aef8fef17d53d9fc2e23ef2d62a96203 |
| institution | Universidad de Zaragoza |
| instname_str | Universidad de Zaragoza |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:zaguan.unizar.es:61700 |
| publishDate | 2017 |
| publishDateSort | 2017 |
| reponame_str | Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| spelling | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods Diez, J.C. Madre, M.A. Torres, M.A. Rasekh, S. Sotelo, A. [Bi2Ba2O4]p[CoO2] thermoelectric ceramics have been successfully grown from the melt using the laser floating zone method, followed by a thermal treatment at 700°C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the thermal treatment length. Microstructure has shown that as-grown samples are composed of thermoelectric grains, together with a relatively high amount of secondary phases. Thermal treatment decreased the number and amount of secondary phases, producing nearly single-phase samples after 384 h. Consequently, the thermoelectric properties evaluated through the power factor showed a slight increase with the thermal treatment length, mainly due to the decrease of electrical resistivity, while the Seebeck coefficient was nearly unchanged. On the other hand, flexural strength was practically constant after 24 h thermal treatment. http://zaguan.unizar.es/record/61700 |
| spellingShingle | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods Diez, J.C. |
| status_str | publishedVersion |
| title | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods |
| title_full | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods |
| title_fullStr | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods |
| title_full_unstemmed | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods |
| title_short | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods |
| title_sort | Long-term high-temperature stability of directionally grown [Bi2Ba2O4]p[CoO2] rods |
| url | http://zaguan.unizar.es/record/61700 |