Phase evolution studies of (TI,Pb)(Sr1.6Ba0.4Ca2Cu3Oy superconductors

M. Paranthaman; D. E. Heatherly; P. M. Martin

doi:10.1016/0025-5408(95)00115-8

Phase evolution studies of (TI,Pb)(Sr_1.6Ba_0.4Ca₂Cu₃O_y superconductors

M. Paranthaman, D. E. Heatherly, P. M. Martin

Nanomaterials Chemistry Group

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Optimum compositions that lead to (Tl_1-xPb_x)(Sr_1.6Ba_0.4)Ca₂Cu₃Ag_0.4O_y (referred to as Tl,Pb-1223) phase evolution have been identified. The Tl-free precursor powders with the composition Sr_1.6Ba_0.4Ca₂Cu₃Ag_0.4O₇ were prepared in an aerosol flow reactor. These precursor powders were then mixed with appropriate amounts of T1₂O₃ and PbO, pressed and wrapped in a gold foil, and introduced into a furnace kept at 920 °C where they were held at 920 °C for 2 hours before being slow cooled to room temperature in 4-5 hours under flowing oxygen. X-ray data showed that single-phase Tl,Pb-1223 can be obtained in the range x = 0.3-0.5. All the samples studied were found to be superconducting. The T_c (diamagnetic onset) for Tl,Pb-1223 single phase varies from 105 K to 116 K for the as-synthesized samples.

Original language	English
Pages (from-to)	1243-1248
Number of pages	6
Journal	Materials Research Bulletin
Volume	30
Issue number	10
DOIs	https://doi.org/10.1016/0025-5408(95)00115-8
State	Published - Oct 1995

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title = "Phase evolution studies of (TI,Pb)(Sr1.6Ba0.4Ca2Cu3Oy superconductors",

abstract = "Optimum compositions that lead to (Tl1-xPbx)(Sr1.6Ba0.4)Ca2Cu3Ag0.4Oy (referred to as Tl,Pb-1223) phase evolution have been identified. The Tl-free precursor powders with the composition Sr1.6Ba0.4Ca2Cu3Ag0.4O7 were prepared in an aerosol flow reactor. These precursor powders were then mixed with appropriate amounts of T12O3 and PbO, pressed and wrapped in a gold foil, and introduced into a furnace kept at 920 °C where they were held at 920 °C for 2 hours before being slow cooled to room temperature in 4-5 hours under flowing oxygen. X-ray data showed that single-phase Tl,Pb-1223 can be obtained in the range x = 0.3-0.5. All the samples studied were found to be superconducting. The Tc (diamagnetic onset) for Tl,Pb-1223 single phase varies from 105 K to 116 K for the as-synthesized samples.",

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year = "1995",

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T1 - Phase evolution studies of (TI,Pb)(Sr1.6Ba0.4Ca2Cu3Oy superconductors

AU - Paranthaman, M.

AU - Heatherly, D. E.

AU - Martin, P. M.

PY - 1995/10

Y1 - 1995/10

N2 - Optimum compositions that lead to (Tl1-xPbx)(Sr1.6Ba0.4)Ca2Cu3Ag0.4Oy (referred to as Tl,Pb-1223) phase evolution have been identified. The Tl-free precursor powders with the composition Sr1.6Ba0.4Ca2Cu3Ag0.4O7 were prepared in an aerosol flow reactor. These precursor powders were then mixed with appropriate amounts of T12O3 and PbO, pressed and wrapped in a gold foil, and introduced into a furnace kept at 920 °C where they were held at 920 °C for 2 hours before being slow cooled to room temperature in 4-5 hours under flowing oxygen. X-ray data showed that single-phase Tl,Pb-1223 can be obtained in the range x = 0.3-0.5. All the samples studied were found to be superconducting. The Tc (diamagnetic onset) for Tl,Pb-1223 single phase varies from 105 K to 116 K for the as-synthesized samples.

AB - Optimum compositions that lead to (Tl1-xPbx)(Sr1.6Ba0.4)Ca2Cu3Ag0.4Oy (referred to as Tl,Pb-1223) phase evolution have been identified. The Tl-free precursor powders with the composition Sr1.6Ba0.4Ca2Cu3Ag0.4O7 were prepared in an aerosol flow reactor. These precursor powders were then mixed with appropriate amounts of T12O3 and PbO, pressed and wrapped in a gold foil, and introduced into a furnace kept at 920 °C where they were held at 920 °C for 2 hours before being slow cooled to room temperature in 4-5 hours under flowing oxygen. X-ray data showed that single-phase Tl,Pb-1223 can be obtained in the range x = 0.3-0.5. All the samples studied were found to be superconducting. The Tc (diamagnetic onset) for Tl,Pb-1223 single phase varies from 105 K to 116 K for the as-synthesized samples.

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ER -

Phase evolution studies of (TI,Pb)(Sr_1.6Ba_0.4Ca₂Cu₃O_y superconductors

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