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Author:

Zeng, Hong (Zeng, Hong.) | Zhang, Jiuxing (Zhang, Jiuxing.) | Kuang, Chunjiang (Kuang, Chunjiang.) | Yue, Ming (Yue, Ming.) (Scholars:岳明)

Indexed by:

EI Scopus SCIE

Abstract:

Direct measurements of the magneto-caloric effect of Gd5Si2Ge2 alloys under heat treatment conditions are investigated by measuring adiabatic temperature change (Delta T (ad)) in a magnetic field of 1.5 T using a homemade magnetocaloric effect measuring apparatus. The crystal structure, microstructure as well as the chemical composition of the alloys are measured using X-ray diffraction (XRD), scanning electron microscope (SEM) with energy dispersive X-ray Detector (EDX). It is found that the microstructure of the alloys could be fully homogenized and the impurities in the alloys could be remarkably removed via appropriate heat treatment. As a result, the maximum adiabatic temperature change (Delta T (ad)) of the alloy annealed at 1573 K increases by 105% from 1.9 to 3.9 K for a magnetic field change from 0 to 15 kOe when compared to the as arc-melted material, while the magnetic ordering temperature slightly reduced.

Keyword:

Heat treatment Adiabatic temperature change (Delta T-ad) Gd5Si2Ge2 alloys Microstructure

Author Community:

  • [ 1 ] [Zeng, Hong]Adv Technol & Mat Co Ltd, China Iron & Steel Res Inst Grp, Beijing 100081, Peoples R China
  • [ 2 ] [Kuang, Chunjiang]Adv Technol & Mat Co Ltd, China Iron & Steel Res Inst Grp, Beijing 100081, Peoples R China
  • [ 3 ] [Zhang, Jiuxing]Beijing Univ Technol, Minist Educ, Key Lab Adv Funct Mat, Beijing 100022, Peoples R China
  • [ 4 ] [Yue, Ming]Beijing Univ Technol, Minist Educ, Key Lab Adv Funct Mat, Beijing 100022, Peoples R China

Reprint Author's Address:

  • [Zeng, Hong]Adv Technol & Mat Co Ltd, China Iron & Steel Res Inst Grp, Beijing 100081, Peoples R China

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Source :

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM

ISSN: 1557-1939

Year: 2012

Issue: 2

Volume: 25

Page: 487-490

1 . 8 0 0

JCR@2022

ESI Discipline: PHYSICS;

JCR Journal Grade:4

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 5

SCOPUS Cited Count: 5

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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