Effect of acceptor impurity (Cu and Al) in Zn4Sb3 thermoelectric materials via hotisostatic pressing (HIP) method

Nor Hairin, Assayidatul Laila and Idris, Mohd Fitri and Othman, Raihan and Mohd Daud, Farah Diana and Rozhan, Alya Naili and Mohd Zaki, Hafizah Hanim (2019) Effect of acceptor impurity (Cu and Al) in Zn4Sb3 thermoelectric materials via hotisostatic pressing (HIP) method. In: Materials characterization using x-rays and related techniques, 18th-19th August 2018, Kota Bharu Kelantan.

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Abstract

This project investigates the influence of dopants use via hot-isostatic pressing (HIP) sintering technique on thermoelectric properties. A total of 8 samples weighing 3 g each at different compositions (Zn4-xMxSb3) (M = Cu, Al) (x= 0, 0.3, 0.6 at.%) were prepared via powder metallurgy technique and followed by HIP sintering process. The relativedensity of all the samples recorded 85-95% which is comparable to the published data. From the XRD results, a near single phase of Zn4Sb3 was obtained. The SEM images revealed a minor of porous surface exist and showed metallurgical bonding formed in the prepared samples. From thermoelectric properties characterization, Cu showed as an effective element to lower the electrical resistivity as compared to Al when Sample 6 (Zn3.4Cu0.6Sb3) recorded 16.18×10-5 Ωm and Sample 8 (Zn3.4Al0.6Sb3) was 27.09×10-5 Ωm. The results showed that HIP sintering technique at lower temperature compare to other studies offers potential processing route to produce a good thermoelectric material associated with the doping element.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	7683/70582
Uncontrolled Keywords:	Zn4Sb3, thermoelectric materials, hot-isostatic pressure method, Cu doped, Al doped
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering Kulliyyah of Engineering > Department of Science
Depositing User:	Dr Assayidatul Laila Nor Hairin
Date Deposited:	01 Mar 2019 10:21
Last Modified:	18 Jul 2019 16:25
URI:	http://irep.iium.edu.my/id/eprint/70582

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