A solution calorimetric study on stability of superconducting YBa2Cu3O6.91

Seong Gu Kang; Jin Ho Choy; Duk Young Jung; Q. Won Choi

doi:10.1016/0921-4534(91)91610-G

A solution calorimetric study on stability of superconducting YBa₂Cu₃O_6.91

Seong Gu Kang
, Jin Ho Choy
, Duk Young Jung
, Q. Won Choi

Seoul National University

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

1 Scopus citations

Abstract

The enthalpies of solution of 90K superconducting YBa₂Cu₃O_6.91 in 1N HCl aqueous solution has been measured calorimetrically at 298K. In combination with auxilliary values from literatures, the standard enthalpies of formation of YBa₂Cu₃O_6.91 has been derived. The value of Δ_fH_m°(YBa₂Cu₃O_6.91) is estimated 3027 ± α kJ/mol (α is from the auxilliary values and experimental error and is less than 5). By use of entropy value of YBa₂Cu₃O_6.91. we found an increase in the stability of the compound relative to the parent oxides (Y₂O₃, BaO and CuO) from 300K up to 1156K. These results explain why the superconducting YBC oxide has a tendency to decompose above 1200K in the thermodynamic view point.

Original language	English
Pages (from-to)	773-774
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	185-189
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(91)91610-G
State	Published - 1 Dec 1991
Externally published	Yes

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title = "A solution calorimetric study on stability of superconducting YBa2Cu3O6.91",

abstract = "The enthalpies of solution of 90K superconducting YBa2Cu3O6.91 in 1N HCl aqueous solution has been measured calorimetrically at 298K. In combination with auxilliary values from literatures, the standard enthalpies of formation of YBa2Cu3O6.91 has been derived. The value of ΔfHm°(YBa2Cu3O6.91) is estimated 3027 ± α kJ/mol (α is from the auxilliary values and experimental error and is less than 5). By use of entropy value of YBa2Cu3O6.91. we found an increase in the stability of the compound relative to the parent oxides (Y2O3, BaO and CuO) from 300K up to 1156K. These results explain why the superconducting YBC oxide has a tendency to decompose above 1200K in the thermodynamic view point.",

author = "Kang, \{Seong Gu\} and Choy, \{Jin Ho\} and Jung, \{Duk Young\} and \{Won Choi\}, Q.",

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doi = "10.1016/0921-4534(91)91610-G",

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volume = "185-189",

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T1 - A solution calorimetric study on stability of superconducting YBa2Cu3O6.91

AU - Kang, Seong Gu

AU - Choy, Jin Ho

AU - Jung, Duk Young

AU - Won Choi, Q.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - The enthalpies of solution of 90K superconducting YBa2Cu3O6.91 in 1N HCl aqueous solution has been measured calorimetrically at 298K. In combination with auxilliary values from literatures, the standard enthalpies of formation of YBa2Cu3O6.91 has been derived. The value of ΔfHm°(YBa2Cu3O6.91) is estimated 3027 ± α kJ/mol (α is from the auxilliary values and experimental error and is less than 5). By use of entropy value of YBa2Cu3O6.91. we found an increase in the stability of the compound relative to the parent oxides (Y2O3, BaO and CuO) from 300K up to 1156K. These results explain why the superconducting YBC oxide has a tendency to decompose above 1200K in the thermodynamic view point.

AB - The enthalpies of solution of 90K superconducting YBa2Cu3O6.91 in 1N HCl aqueous solution has been measured calorimetrically at 298K. In combination with auxilliary values from literatures, the standard enthalpies of formation of YBa2Cu3O6.91 has been derived. The value of ΔfHm°(YBa2Cu3O6.91) is estimated 3027 ± α kJ/mol (α is from the auxilliary values and experimental error and is less than 5). By use of entropy value of YBa2Cu3O6.91. we found an increase in the stability of the compound relative to the parent oxides (Y2O3, BaO and CuO) from 300K up to 1156K. These results explain why the superconducting YBC oxide has a tendency to decompose above 1200K in the thermodynamic view point.

UR - https://www.scopus.com/pages/publications/0026376028

U2 - 10.1016/0921-4534(91)91610-G

DO - 10.1016/0921-4534(91)91610-G

M3 - Article

AN - SCOPUS:0026376028

SN - 0921-4534

VL - 185-189

SP - 773

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - PART 2

ER -

A solution calorimetric study on stability of superconducting YBa₂Cu₃O_6.91

Abstract

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