Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures

The influence of sintering temperatures on the fabrication of YBCO ceramics under normal air atmosphere was investigated in this study. YBCO ceramics were prepared by mixing starting compounds of Y2O3, BaCO3 and CuO powders, which were calcined at 850°C for 12 h. The powder was pelletized and sinter...

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Main Authors: Prayoonphokkharat P., Jiansirisomboon S., Watcharapasorn A.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-84880397350&partnerID=40&md5=1687deb223b306fd12efcff06bc3cab8
http://cmuir.cmu.ac.th/handle/6653943832/7149
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-71492014-08-30T03:51:38Z Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures Prayoonphokkharat P. Jiansirisomboon S. Watcharapasorn A. The influence of sintering temperatures on the fabrication of YBCO ceramics under normal air atmosphere was investigated in this study. YBCO ceramics were prepared by mixing starting compounds of Y2O3, BaCO3 and CuO powders, which were calcined at 850°C for 12 h. The powder was pelletized and sintered at different temperatures, from 930°C-1050°C, for 12 h. Phase identification was carried out by x-ray diffraction (XRD) technique. Scanning electron microscopy (SEM) with energy dispersive x-ray analysis (EDS) was used to study microstructure and chemical composition. In addition, density, Vickers hardness properties, the change of resistance and dielectric properties with temperature above Tc were investigated. It was found that, at 950°C-1000°C, high-purity YBCO ceramic could be obtained. Outside this temperature range, either impurity phases were present or melting occurred. SEM images showed that grain size, which ranged from 1.5-2.5 μm, and hardness were related to density and liquid phase present in the sample. Furthermore, the sintering temperature affected oxygen content which, in turn, determined the conductive or semi-conductive behavior observed by electrical property measurement. © 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht. 2014-08-30T03:51:38Z 2014-08-30T03:51:38Z 2013 Article 17388090 10.1007/s13391-013-0020-6 http://www.scopus.com/inward/record.url?eid=2-s2.0-84880397350&partnerID=40&md5=1687deb223b306fd12efcff06bc3cab8 http://cmuir.cmu.ac.th/handle/6653943832/7149 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description The influence of sintering temperatures on the fabrication of YBCO ceramics under normal air atmosphere was investigated in this study. YBCO ceramics were prepared by mixing starting compounds of Y2O3, BaCO3 and CuO powders, which were calcined at 850°C for 12 h. The powder was pelletized and sintered at different temperatures, from 930°C-1050°C, for 12 h. Phase identification was carried out by x-ray diffraction (XRD) technique. Scanning electron microscopy (SEM) with energy dispersive x-ray analysis (EDS) was used to study microstructure and chemical composition. In addition, density, Vickers hardness properties, the change of resistance and dielectric properties with temperature above Tc were investigated. It was found that, at 950°C-1000°C, high-purity YBCO ceramic could be obtained. Outside this temperature range, either impurity phases were present or melting occurred. SEM images showed that grain size, which ranged from 1.5-2.5 μm, and hardness were related to density and liquid phase present in the sample. Furthermore, the sintering temperature affected oxygen content which, in turn, determined the conductive or semi-conductive behavior observed by electrical property measurement. © 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
format Article
author Prayoonphokkharat P.
Jiansirisomboon S.
Watcharapasorn A.
spellingShingle Prayoonphokkharat P.
Jiansirisomboon S.
Watcharapasorn A.
Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
author_facet Prayoonphokkharat P.
Jiansirisomboon S.
Watcharapasorn A.
author_sort Prayoonphokkharat P.
title Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
title_short Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
title_full Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
title_fullStr Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
title_full_unstemmed Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
title_sort fabrication and properties of yba2cu3o7-x ceramics at different sintering temperatures
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-84880397350&partnerID=40&md5=1687deb223b306fd12efcff06bc3cab8
http://cmuir.cmu.ac.th/handle/6653943832/7149
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