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 language | English |
|---|---|
| Pages (from-to) | 297-305 |
| Number of pages | 9 |
| Journal | Materials Chemistry and Physics |
| Volume | 27 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1991 |
| Externally published | Yes |
Fingerprint
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 journal › Article
}
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 -