Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds

The cubic NaZn₁₃-type LaFe₁₃-xSix based compounds have been studied systematically and have become one of the most interesting systems for exploring large magnetocaloric effects, MCE. Its magnetic properties are strongly doping dependent and provides many advantages compared to other as magnetic mat...

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Main Author:	Yang Nurhidayah Asnida, Norizan
Format:	Thesis
Language:	English English
Published:	2021
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://ir.upnm.edu.my/id/eprint/222/1/EFFECT%20OF%20DIFFERENT%20%2825p%29.pdf http://ir.upnm.edu.my/id/eprint/222/2/EFFECT%20OF%20DIFFERENT%20%28Full%29.pdf
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spelling	my-upnm-ir.2222023-03-31T07:22:35Z Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds 2021-03-25 Yang Nurhidayah Asnida, Norizan TK Electrical engineering. Electronics Nuclear engineering The cubic NaZn₁₃-type LaFe₁₃-xSix based compounds have been studied systematically and have become one of the most interesting systems for exploring large magnetocaloric effects, MCE. Its magnetic properties are strongly doping dependent and provides many advantages compared to other as magnetic materials for magnetic refrigerator application. For the sample preparation, the study of ball milling treatment and properties in La(FeSi)₁₃ compound from raw materials of Lanthanum (La), Iron(Fe) and Silicon (Si) as refrigerant for magnetic refrigeration system have been conducted intensively. The compounds underwent the pellet press process. For the structural properties investigation, LaFe₁₁.₅Si₁.₅ compounds were annealed at two different heat treatment which are 1323 K for 14 days and 1523 K for 4 hour. The powder Xray diffraction shows that high temperature annealing increase the main structure and decrease the impurity (α-Fe and LaFeSi). Rietveld refinement results indicate that the lattice parameter has increased at the high temperature annealing because of more cubic NaZn13 is formed at higher temperature. In an effort to explore the effect of La substitution by Y in NaZn₁₃-type La₁₋ₓYₓFe₁₁.₅Si₁.₅ (x=0, 0.05, 0.1, 0.3) compound, the structural and magnetic properties of the heat treatment have been studied systematically. The permittivity measurements found that, for La₁₋ₓYₓFe₁₁.₅Si₁.₅ at Y=0.05, it shows high value of resistivity while at Y= 0.3 it has the lowest value of tan delta. On mechanical perspective,iii the highest storage modulus and static stress are at Y=0.3 which are 3.8x Pa and 2.72x N/ respectively. 2021-03 Thesis http://ir.upnm.edu.my/id/eprint/222/ http://ir.upnm.edu.my/id/eprint/222/1/EFFECT%20OF%20DIFFERENT%20%2825p%29.pdf text en public http://ir.upnm.edu.my/id/eprint/222/2/EFFECT%20OF%20DIFFERENT%20%28Full%29.pdf text en validuser mphil masters Universiti Pertahanan Nasional Malaysia Centre For Graduate Studies
institution	Universiti Pertahanan Nasional Malaysia
collection	UPNM Institutional Repository
language	English English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Yang Nurhidayah Asnida, Norizan Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds
description	The cubic NaZn₁₃-type LaFe₁₃-xSix based compounds have been studied systematically and have become one of the most interesting systems for exploring large magnetocaloric effects, MCE. Its magnetic properties are strongly doping dependent and provides many advantages compared to other as magnetic materials for magnetic refrigerator application. For the sample preparation, the study of ball milling treatment and properties in La(FeSi)₁₃ compound from raw materials of Lanthanum (La), Iron(Fe) and Silicon (Si) as refrigerant for magnetic refrigeration system have been conducted intensively. The compounds underwent the pellet press process. For the structural properties investigation, LaFe₁₁.₅Si₁.₅ compounds were annealed at two different heat treatment which are 1323 K for 14 days and 1523 K for 4 hour. The powder Xray diffraction shows that high temperature annealing increase the main structure and decrease the impurity (α-Fe and LaFeSi). Rietveld refinement results indicate that the lattice parameter has increased at the high temperature annealing because of more cubic NaZn13 is formed at higher temperature. In an effort to explore the effect of La substitution by Y in NaZn₁₃-type La₁₋ₓYₓFe₁₁.₅Si₁.₅ (x=0, 0.05, 0.1, 0.3) compound, the structural and magnetic properties of the heat treatment have been studied systematically. The permittivity measurements found that, for La₁₋ₓYₓFe₁₁.₅Si₁.₅ at Y=0.05, it shows high value of resistivity while at Y= 0.3 it has the lowest value of tan delta. On mechanical perspective,iii the highest storage modulus and static stress are at Y=0.3 which are 3.8x Pa and 2.72x N/ respectively.
format	Thesis
qualification_name	Master of Philosophy (MPhil)
qualification_level	Master's degree
author	Yang Nurhidayah Asnida, Norizan
author_facet	Yang Nurhidayah Asnida, Norizan
author_sort	Yang Nurhidayah Asnida, Norizan
title	Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds
title_short	Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds
title_full	Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds
title_fullStr	Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds
title_full_unstemmed	Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds
title_sort	effect of different heat treatment annealing and substitution of lanthanum (la) with yttrium (y) in la(fe,si)13 compounds
granting_institution	Universiti Pertahanan Nasional Malaysia
granting_department	Centre For Graduate Studies
publishDate	2021
url	http://ir.upnm.edu.my/id/eprint/222/1/EFFECT%20OF%20DIFFERENT%20%2825p%29.pdf http://ir.upnm.edu.my/id/eprint/222/2/EFFECT%20OF%20DIFFERENT%20%28Full%29.pdf
_version_	1813223578343047168

Effect of different heat treatment annealing and substitution of lanthanum (La) with yttrium (Y) In La(Fe,Si)13 compounds

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