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Exploring the high-temperature electrical performance of Ca3-xLaxCo4O9 thermoelectric ceramics for moderate and low substitution levels

Autor: Gabriel Constantinescu, Andrei V. Kovalevsky, Shahed Rasekh, Daniela V. Lopes, Parisa Amirkhizi, M. A. Madre, J. C. Diez, Miguel A. Vieira, Andres Sotelo, M. A. Torres

Publikováno v: Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Symmetry
Volume 13
Issue 5
Symmetry, Vol 13, Iss 782, p 782 (2021)
Digital.CSIC. Repositorio Institucional del CSIC

This article belongs to the Special Issue Advances in Thermoelectric Materials: From Particle to Bulk.
Aliovalent substitutions in Ca3Co4O9 often result in complex effects on the electrical properties and the solubility, and impact of the substi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9fb757bddfaf8ae9e42190c6c52caa9
http://zaguan.unizar.es/record/110585

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New environmentally friendly Ba-Fe-O thermoelectric material by flexible laser floating zone processing

Autor: Andrei V. Kovalevsky, M. A. Torres, Nuno M. F. Ferreira, Andres Sotelo, J. C. Diez, Florinda M. Costa, M. A. Madre

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Ceramics with nominal BaFe12Ox composition were processed through laser floating zone technique from 25 to 200 mm/h growth rates. These processing conditions were found to promote microstructural differences between the outer and inner parts of the r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b87ad0b24a988f930aec4ae93fb2c2f
https://doi.org/10.1016/j.scriptamat.2017.10.011

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From nanosized precursors to high performance ceramics: the case of Bi2Ca2Co1.7Ox

Autor: C. Salvador, M. A. Madre, Andres Sotelo, Karim Touati, Michael Depriester, J. C. Diez, Sh. Rasekh, M. A. Torres, P. Bosque

Publikováno v: Materials Letters
Materials Letters, Elsevier, 2017, 191, pp.14-16. ⟨10.1016/j.matlet.2017.01.031⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
Zaguán. Repositorio Digital de la Universidad de Zaragoza

et al.
Bi2Ca2Co1.7Ox thermoelectric ceramics were prepared by four different synthesis routes: coprecipitation with ammonium carbonate or oxalic acid, attrition milling, and solid state (as reference). Microstructure showed that coprecipitation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5075e40d8ad15f7c38f90eb6987a8ed5
http://zaguan.unizar.es/record/79514

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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

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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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 g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b23ba495bad48d92a0b135e5b950e260
http://hdl.handle.net/10261/181578

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Π Unileg thermoelectric structure for cycling robustness at high temperature and low manufacturing cost

Autor: M. A. Madre, I. Urrutibeascoa, Pablo Martínez-Filgueira, J. C. Diez, M. A. Torres, Andres Sotelo, Marta Cordón, Gustavo Garcia

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Unileg-type thermoelectric generators have proven to be a good choice for high-temperature applications, because their composition from a single thermoelectric material avoids different thermal expansion coefficients, giving the structure good mechan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b224942798e47f622156398ee89b6e1a
http://hdl.handle.net/10261/202667

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Effect of alkaline earth dopant on density, mechanical, and electrical properties of Cu0.97AE0.03CrO2 (AE = Mg, Ca, Sr, and Ba) delafossite oxide

Autor: J. A. Gomez, M. A. Madre, Andres Sotelo, M. A. Torres, J. C. Diez

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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CuCrO2 and Cu0.97AE0.03CrO2 (AE = Mg, Ca, Sr, and Ba) polycrystalline materials have been prepared through the classical solid state route. CuCrO2 is the major phase in all cases, with larger grain sizes when the alkaline earth dopant is larger. Dopi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dfc6522b8aba23388313df280573540
http://hdl.handle.net/10261/181522

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High-temperature stability of hot-pressed Sr-doped Ca3Co4O9

Autor: Gustavo Garcia, M. A. Torres, I. Urrutibeascoa, Andres Sotelo, J. C. Diez, M. A. Madre

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Bulk textured Ca2.93Sr0.07Co4O9 samples have been prepared by hot uniaxial pressing followed by thermal treatment at 800°C under air for between 0 h and 1532 h. The microstructural, thermoelectric, and mechanical properties as well as density of all

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9cce2c0b4d54364695f85744e53b6ef
http://hdl.handle.net/10261/181589

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Thermoelectric properties of directionally grown Bi2Ba2Co2Oδ/Ag composites: effect of annealing

Autor: P. Bosque, M. A. Madre, M. A. Torres, Andres Sotelo, J. C. Diez, Sh. Rasekh

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Bi2Ba2Co2Oδ thermoelectric ceramics with Ag additions (0, 1, 3, and 5 wt%) have been successfully textured using the laser floating zone method. Microstructure has shown that samples are composed by thermoelectric grains, together with a high amount

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8956403a8b7093a848847cade3171b59
https://doi.org/10.1007/s10854-016-5435-z

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Tailoring Ca3Co4O9 microstructure and performances using a transient liquid phase sintering additive

Autor: Vitor S. Amaral, M. A. Madre, Florinda M. Costa, M. A. Torres, Andres Sotelo, Andrei V. Kovalevsky, Marta C. Ferro, Sh. Rasekh, Nuno M. F. Ferreira, João S. Amaral, J. C. Diez

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Digital.CSIC. Repositorio Institucional del CSIC
instname

et al.
A flexible, adaptable, economical and easily scalable processing route, allowing microstructural control, is presented. It involves classical solid state sintering method and addition of liquid promoting compound. Controlled porosity and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::423b83751b1ae992850800a2f708d51c
https://doi.org/10.1016/j.jeurceramsoc.2015.11.024

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Significant enhancement of the thermoelectric performance in Ca3Co4O9 thermoelectric materials through combined strontium substitution and hot-pressing process

Autor: Andrei V. Kovalevsky, Karim Touati, J. C. Diez, Sh. Rasekh, Michael Depriester, Andres Sotelo, Nuno M. F. Ferreira, M. A. Torres, Delphine Flahaut, Florinda M. Costa, M. A. Madre, Joachim Allouche

Publikováno v: Journal of the European Ceramic Society
Journal of the European Ceramic Society, 2018, 39 (4), pp.1186-1192. ⟨10.1016/j.jeurceramsoc.2018.12.049⟩
Journal of the European Ceramic Society, Elsevier, 2018, 39 (4), pp.1186-1192. ⟨10.1016/j.jeurceramsoc.2018.12.049⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
Zaguán. Repositorio Digital de la Universidad de Zaragoza
Journal of the European Ceramic Society, Elsevier, 2019, 39 (4), pp.1186-1192. ⟨10.1016/j.jeurceramsoc.2018.12.049⟩
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

This work explores the possibilities for a further enhancement of the thermoelectric properties of Ca3Co4O9 by Sr-doping combined with hot-pressing. Modified hot-pressing process resulted in highly-textured and dense ceramics. Sr-doping significantly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c8e4e1aa760579846d5cb7c20b440bb
https://hal.science/hal-01974115

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