Staff View: Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling

Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling

This work reports the enhancement of thermoelectric properties of La0.5Co4Sb12 compound due to addition of Al. A polycrystalline AlxLa0.5Co4Sb12 (0 <= x <= 0.5) skutterudites were successfully prepared by mechanical alloying and spark plasma sintering techniques. The characterization of phase...

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Main Authors:	Bashir, Mohamed Bashir Ali, Sabri, Mohd Faizul Mohd, Said, Suhana Mohd, Miyazaki, Yuzuru, Badruddin, Irfan Anjum, Shnawah, Dhafer Abdul Ameer, Salih, Ethar Yahya, Abushousha, Sabir, Elsheikh, Mohamed Hamid
Format:	Article
Published:	Elsevier 2020
Subjects:	T Technology (General) TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.um.edu.my/36776/
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spelling	my.um.eprints.367762023-12-01T13:48:12Z http://eprints.um.edu.my/36776/ Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling Bashir, Mohamed Bashir Ali Sabri, Mohd Faizul Mohd Said, Suhana Mohd Miyazaki, Yuzuru Badruddin, Irfan Anjum Shnawah, Dhafer Abdul Ameer Salih, Ethar Yahya Abushousha, Sabir Elsheikh, Mohamed Hamid T Technology (General) TK Electrical engineering. Electronics Nuclear engineering This work reports the enhancement of thermoelectric properties of La0.5Co4Sb12 compound due to addition of Al. A polycrystalline AlxLa0.5Co4Sb12 (0 <= x <= 0.5) skutterudites were successfully prepared by mechanical alloying and spark plasma sintering techniques. The characterization of phase structure and morphology of AlxLa0.5Co4Sb12 bulk samples are examined by XRD and SEM-EDX analysis. The results revealed that the main phase of CoSb3 skutterudite structure with a small amount of Al were distributed in the grain boundaries for the most of AlxLa0.5Co4Sb12 samples. The thermoelectric measurements of consolidated samples were evaluated from room temperature to 800 K. The electrical resistivity remarkably reduced through the addition of Al to the lowest value of 7.6 mu Omega m at room temperature for Al0.05La0.5Co4Sb12 sample. Moreover, the absolute Seebeck coefficient was significantly improved by Al addition and the highest value of 193 mu V/K was observed at 789 K for Al0.05La0.5Co4Sb12 sample. Furthermore, the same formulation showed a significant enhancement on the power factor that reached the maximum value of 4.02 x 10(-3) W/mK(2) at 789 K. The thermal conductivity and lattice thermal conductivity were significantly minimized to the value of 1.1 W/mK (at 789 K) and 0.64 W/mK (at 595 K), respectively for Al0.3La0.5Co4Sb12 due to the enhancement of phonon scattering. Additionally, a comprehensive improvement on the dimensionless figure of merit value ZT of 1.36 for Al0.05La0.5Co4Sb12 at 789 K has been achieved. Elsevier 2020-04 Article PeerReviewed Bashir, Mohamed Bashir Ali and Sabri, Mohd Faizul Mohd and Said, Suhana Mohd and Miyazaki, Yuzuru and Badruddin, Irfan Anjum and Shnawah, Dhafer Abdul Ameer and Salih, Ethar Yahya and Abushousha, Sabir and Elsheikh, Mohamed Hamid (2020) Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling. Journal of Solid State Chemistry, 284. ISSN 0022-4596, DOI https://doi.org/10.1016/j.jssc.2020.121205 <https://doi.org/10.1016/j.jssc.2020.121205>. 10.1016/j.jssc.2020.121205
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	T Technology (General) TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	T Technology (General) TK Electrical engineering. Electronics Nuclear engineering Bashir, Mohamed Bashir Ali Sabri, Mohd Faizul Mohd Said, Suhana Mohd Miyazaki, Yuzuru Badruddin, Irfan Anjum Shnawah, Dhafer Abdul Ameer Salih, Ethar Yahya Abushousha, Sabir Elsheikh, Mohamed Hamid Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling
description	This work reports the enhancement of thermoelectric properties of La0.5Co4Sb12 compound due to addition of Al. A polycrystalline AlxLa0.5Co4Sb12 (0 <= x <= 0.5) skutterudites were successfully prepared by mechanical alloying and spark plasma sintering techniques. The characterization of phase structure and morphology of AlxLa0.5Co4Sb12 bulk samples are examined by XRD and SEM-EDX analysis. The results revealed that the main phase of CoSb3 skutterudite structure with a small amount of Al were distributed in the grain boundaries for the most of AlxLa0.5Co4Sb12 samples. The thermoelectric measurements of consolidated samples were evaluated from room temperature to 800 K. The electrical resistivity remarkably reduced through the addition of Al to the lowest value of 7.6 mu Omega m at room temperature for Al0.05La0.5Co4Sb12 sample. Moreover, the absolute Seebeck coefficient was significantly improved by Al addition and the highest value of 193 mu V/K was observed at 789 K for Al0.05La0.5Co4Sb12 sample. Furthermore, the same formulation showed a significant enhancement on the power factor that reached the maximum value of 4.02 x 10(-3) W/mK(2) at 789 K. The thermal conductivity and lattice thermal conductivity were significantly minimized to the value of 1.1 W/mK (at 789 K) and 0.64 W/mK (at 595 K), respectively for Al0.3La0.5Co4Sb12 due to the enhancement of phonon scattering. Additionally, a comprehensive improvement on the dimensionless figure of merit value ZT of 1.36 for Al0.05La0.5Co4Sb12 at 789 K has been achieved.
format	Article
author	Bashir, Mohamed Bashir Ali Sabri, Mohd Faizul Mohd Said, Suhana Mohd Miyazaki, Yuzuru Badruddin, Irfan Anjum Shnawah, Dhafer Abdul Ameer Salih, Ethar Yahya Abushousha, Sabir Elsheikh, Mohamed Hamid
author_facet	Bashir, Mohamed Bashir Ali Sabri, Mohd Faizul Mohd Said, Suhana Mohd Miyazaki, Yuzuru Badruddin, Irfan Anjum Shnawah, Dhafer Abdul Ameer Salih, Ethar Yahya Abushousha, Sabir Elsheikh, Mohamed Hamid
author_sort	Bashir, Mohamed Bashir Ali
title	Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling
title_short	Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling
title_full	Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling
title_fullStr	Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling
title_full_unstemmed	Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling
title_sort	enhancement of thermoelectric properties of co4sb12 skutterudite by al and la double filling
publisher	Elsevier
publishDate	2020
url	http://eprints.um.edu.my/36776/
_version_	1784511832874024960
score	13.211869

Enhancement of thermoelectric properties of Co4Sb12 Skutterudite by Al and La double filling

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