Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12858
ชื่อเรื่อง: Determination of Cu 2+ and Cu 3+ by titration in Y134 and Y145 superconductor
ผู้แต่ง: Supadanaison R.
Panklang T.
Wanichayanan C.
Kaewkao A.
Nilkamjon T.
Udomsamuthirun P.
Tiyasri S.
Wongphakdee W.
Kruaehong T.
วันที่เผยแพร่: 2018
บทคัดย่อ: The Y123 (YBa 2 Cu 3 O 7-y ) superconductor is the first high-temperature superconductor having critical temperature, higher than the boiling point of liquid nitrogen. The critical temperature of YBaCuO superconductor depends on the relative concentration of the oxygen within the CuO 2 planes. That the oxygen content has the relation on the ratio of Cu 2+ and Cu 3+ . In this paper, we interested in Y134 (YBa 3 Cu 4 O 9-y ) and Y145 (YBa 4 Cu 5 O 11-y ) superconductor found in 2010. To investigate the effect of Ag 2 O addition on some properties of Y134 and Y145 superconductor, these superconductors doped with Ag 2 O were synthesized by solid state reaction. The calcinations and sintering temperature were at 920 °C and annealing temperature was at 550 °C. The highest critical temperature was found in doped 0.1Ag sample with T c onset at 97 K and 96 K, the lowest critical temperature was found in pure sample with T c onset at 91 K and 95 K for Y134 and Y145, respectively. We found that the surface of Y134 and Y145 superconductor was improved by Ag adding on the porous structure. The Cu 3+ / Cu 2+ ratio of Y134 were high amount on 0.15 and 0.14 at 0.15-doped and 0.1-doped sample. The Cu 3+ / Cu 2+ ratio of Y145 were high amount on 0.10-doped sample which equal to 0.10. Our results mean that the higher Cu 3+ / Cu 2+ ratio, the higher critical temperature found. © 2018 Elsevier Ltd. All rights reserved.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12858
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062715479&doi=10.1016%2fj.matpr.2018.04.026&partnerID=40&md5=7d35aa5610775b81fadee24ed819879c
ISSN: 22147853
Appears in Collections:Scopus 1983-2021

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