Preparation of Ag-Doped NdBa2Cu3C7-δ Superconducting Ceramics by a Sol-Gel Method

G. Murakami; Y. Masuda; S. Fujihara; J. S. Jin; K. Tanabe; T. Kimura

Preparation of Ag-Doped NdBa₂Cu₃C_7-δ Superconducting Ceramics by a Sol-Gel Method

G. Murakami, Y. Masuda, S. Fujihara, J. S. Jin, K. Tanabe, T. Kimura

Department of Applied Chemistry

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

Abstract

Ag-doped NdBa₂Cu₃O_7-δ (Nd123) superconducting ceramics were prepared by a sol-gel method using Nd(O-iC₃H₇)₃, Ba(O-iC₃H₇)₂, Cu(OH)₂ and CH₃COOAg as starting materials. Powders consisting of Nd123 and Ag (metal) were obtained by heating a calcined gel at 700°C in vacuum. The incongruent melting temperature of the Ag-doped Nd123 powders decreased probably due to interfacial reaction between Nd123 and Ag. Dense, sintered bodies could be prepared from the Ag-doped Nd123 powders through a heat-treatment process including incongruent melting. The sintered sample doped with 10mass% Ag showed T_c(onset) at 93 K and T_c(end) at 86 K after annealing in O₂ at 400°C for 200 h. The improvement of the superconducting properties in Ag-doped Nd123 is attributed to densification of the samples by incongruent melting.

Original language	English
Pages (from-to)	121-126
Number of pages	6
Journal	Key Engineering Materials
Volume	157-158
Publication status	Published - 1999 Jan 1

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Preparation of Ag-Doped NdBa2Cu3C7-δ Superconducting Ceramics by a Sol-Gel Method",

abstract = "Ag-doped NdBa2Cu3O7-δ (Nd123) superconducting ceramics were prepared by a sol-gel method using Nd(O-iC3H7)3, Ba(O-iC3H7)2, Cu(OH)2 and CH3COOAg as starting materials. Powders consisting of Nd123 and Ag (metal) were obtained by heating a calcined gel at 700°C in vacuum. The incongruent melting temperature of the Ag-doped Nd123 powders decreased probably due to interfacial reaction between Nd123 and Ag. Dense, sintered bodies could be prepared from the Ag-doped Nd123 powders through a heat-treatment process including incongruent melting. The sintered sample doped with 10mass% Ag showed Tc(onset) at 93 K and Tc(end) at 86 K after annealing in O2 at 400°C for 200 h. The improvement of the superconducting properties in Ag-doped Nd123 is attributed to densification of the samples by incongruent melting.",

author = "G. Murakami and Y. Masuda and S. Fujihara and Jin, {J. S.} and K. Tanabe and T. Kimura",

year = "1999",

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language = "English",

volume = "157-158",

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T1 - Preparation of Ag-Doped NdBa2Cu3C7-δ Superconducting Ceramics by a Sol-Gel Method

AU - Murakami, G.

AU - Masuda, Y.

AU - Fujihara, S.

AU - Jin, J. S.

AU - Tanabe, K.

AU - Kimura, T.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Ag-doped NdBa2Cu3O7-δ (Nd123) superconducting ceramics were prepared by a sol-gel method using Nd(O-iC3H7)3, Ba(O-iC3H7)2, Cu(OH)2 and CH3COOAg as starting materials. Powders consisting of Nd123 and Ag (metal) were obtained by heating a calcined gel at 700°C in vacuum. The incongruent melting temperature of the Ag-doped Nd123 powders decreased probably due to interfacial reaction between Nd123 and Ag. Dense, sintered bodies could be prepared from the Ag-doped Nd123 powders through a heat-treatment process including incongruent melting. The sintered sample doped with 10mass% Ag showed Tc(onset) at 93 K and Tc(end) at 86 K after annealing in O2 at 400°C for 200 h. The improvement of the superconducting properties in Ag-doped Nd123 is attributed to densification of the samples by incongruent melting.

AB - Ag-doped NdBa2Cu3O7-δ (Nd123) superconducting ceramics were prepared by a sol-gel method using Nd(O-iC3H7)3, Ba(O-iC3H7)2, Cu(OH)2 and CH3COOAg as starting materials. Powders consisting of Nd123 and Ag (metal) were obtained by heating a calcined gel at 700°C in vacuum. The incongruent melting temperature of the Ag-doped Nd123 powders decreased probably due to interfacial reaction between Nd123 and Ag. Dense, sintered bodies could be prepared from the Ag-doped Nd123 powders through a heat-treatment process including incongruent melting. The sintered sample doped with 10mass% Ag showed Tc(onset) at 93 K and Tc(end) at 86 K after annealing in O2 at 400°C for 200 h. The improvement of the superconducting properties in Ag-doped Nd123 is attributed to densification of the samples by incongruent melting.

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SN - 1013-9826

VL - 157-158

SP - 121

EP - 126

JO - Key Engineering Materials

JF - Key Engineering Materials

ER -

Preparation of Ag-Doped NdBa₂Cu₃C_7-δ Superconducting Ceramics by a Sol-Gel Method

Abstract

ASJC Scopus subject areas

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