Influence of reaction time, quenching and room aging in lead doped BiCaSrCuO high temperature superconductors

Muralidhar Miryala, D. Mangapathi Rao, V. Hari Babu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Pure and lead doped BiCaSrCuO (2223) compounds have been prepared by solid state reaction at 850°C. In undoped sample the Tc (zero) has been observed at 79K where as in Bi1.75Pb0.25Ca2Sr2Cu3 Oy Tc was obtained at 107K. Increasing the reaction time and rapidly quenching the samples by immersing them in liquid nitrogen, resulted in decrease of Tc. In rapidly quenched samples stepped resistive transitions have been observed. Aging at room temperature over long periods (~Two years) also showed a decrease in Tc and growth of low Tc (2122) phase. Heat treatment and oxygen annealing recovered the high Tc (2223) phase. The growth of low Tc (2122) and high Tc (2223) phase and their inter relationship have been explained.

Original languageEnglish
Pages (from-to)297-305
Number of pages9
JournalMaterials Chemistry and Physics
Volume27
Issue number3
DOIs
Publication statusPublished - 1991
Externally publishedYes

Fingerprint

High temperature superconductors
reaction time
high temperature superconductors
rooms
Quenching
Aging of materials
quenching
Liquid nitrogen
Solid state reactions
Heat treatment
Annealing
Oxygen
liquid nitrogen
heat treatment
solid state
annealing
room temperature
oxygen
Temperature

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Influence of reaction time, quenching and room aging in lead doped BiCaSrCuO high temperature superconductors. / Miryala, Muralidhar; Rao, D. Mangapathi; Hari Babu, V.

In: Materials Chemistry and Physics, Vol. 27, No. 3, 1991, p. 297-305.

Research output: Contribution to journalArticle

@article{9e9c478568f14a849f9a4fd3849444d8,
title = "Influence of reaction time, quenching and room aging in lead doped BiCaSrCuO high temperature superconductors",
abstract = "Pure and lead doped BiCaSrCuO (2223) compounds have been prepared by solid state reaction at 850°C. In undoped sample the Tc (zero) has been observed at 79K where as in Bi1.75Pb0.25Ca2Sr2Cu3 Oy Tc was obtained at 107K. Increasing the reaction time and rapidly quenching the samples by immersing them in liquid nitrogen, resulted in decrease of Tc. In rapidly quenched samples stepped resistive transitions have been observed. Aging at room temperature over long periods (~Two years) also showed a decrease in Tc and growth of low Tc (2122) phase. Heat treatment and oxygen annealing recovered the high Tc (2223) phase. The growth of low Tc (2122) and high Tc (2223) phase and their inter relationship have been explained.",
author = "Muralidhar Miryala and Rao, {D. Mangapathi} and {Hari Babu}, V.",
year = "1991",
doi = "10.1016/0254-0584(91)90126-F",
language = "English",
volume = "27",
pages = "297--305",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier BV",
number = "3",

}

TY - JOUR

T1 - Influence of reaction time, quenching and room aging in lead doped BiCaSrCuO high temperature superconductors

AU - Miryala, Muralidhar

AU - Rao, D. Mangapathi

AU - Hari Babu, V.

PY - 1991

Y1 - 1991

N2 - Pure and lead doped BiCaSrCuO (2223) compounds have been prepared by solid state reaction at 850°C. In undoped sample the Tc (zero) has been observed at 79K where as in Bi1.75Pb0.25Ca2Sr2Cu3 Oy Tc was obtained at 107K. Increasing the reaction time and rapidly quenching the samples by immersing them in liquid nitrogen, resulted in decrease of Tc. In rapidly quenched samples stepped resistive transitions have been observed. Aging at room temperature over long periods (~Two years) also showed a decrease in Tc and growth of low Tc (2122) phase. Heat treatment and oxygen annealing recovered the high Tc (2223) phase. The growth of low Tc (2122) and high Tc (2223) phase and their inter relationship have been explained.

AB - Pure and lead doped BiCaSrCuO (2223) compounds have been prepared by solid state reaction at 850°C. In undoped sample the Tc (zero) has been observed at 79K where as in Bi1.75Pb0.25Ca2Sr2Cu3 Oy Tc was obtained at 107K. Increasing the reaction time and rapidly quenching the samples by immersing them in liquid nitrogen, resulted in decrease of Tc. In rapidly quenched samples stepped resistive transitions have been observed. Aging at room temperature over long periods (~Two years) also showed a decrease in Tc and growth of low Tc (2122) phase. Heat treatment and oxygen annealing recovered the high Tc (2223) phase. The growth of low Tc (2122) and high Tc (2223) phase and their inter relationship have been explained.

UR - http://www.scopus.com/inward/record.url?scp=0026117374&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026117374&partnerID=8YFLogxK

U2 - 10.1016/0254-0584(91)90126-F

DO - 10.1016/0254-0584(91)90126-F

M3 - Article

AN - SCOPUS:0026117374

VL - 27

SP - 297

EP - 305

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

IS - 3

ER -