Constant stoichiometry cooling of YBa2Cu3Ox

Verweij, H.; Bruggink, W.H.M.

doi:10.1016/0022-3697(89)90476-9

Cited by 33 publications

(5 citation statements)

References 67 publications

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“…This is one of the reasons for the variety of the thermodynamic constants that appear in different publications. Table 2, containing data from a review [14] and from later papers [16][17][18][19], illustrates this variety. Our data may help to determine more precisely the values of the enthalpies and entropies of the reactions of YBCO with oxygen.…”

Section: Thermodynamics Of the Equilibriummentioning

confidence: 98%

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Equilibrium and non-equilibrium states of the YBCO–O₂system

Knizhnik¹,

Reisner²,

Shafir³

et al. 2004

Supercond. Sci. Technol.

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The conditions (temperature, pressure and time) for attaining equilibrium with oxygen for different YBCO materials are reported. The equilibrium oxygen content was used in order to determine more exact values for the enthalpies and entropies of interaction of YBa2Cu3Oy with oxygen. Internal equilibrium in YBCO is proposed and is able to explain the effects of ageing and low temperature annealing on Tc. Homogeneity and transitions to superconductivity of ceramics having equilibrium and non-equilibrium oxygen contents are discussed.

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Section: Thermodynamics Of the Equilibriummentioning

confidence: 98%

“…The total concentration Table 2. Thermodynamic data for the interaction of YBCO with oxygen taken from review [14,[16][17][18][19]] and this study.…”

Section: Thermodynamics Of the Equilibriummentioning

confidence: 99%

Equilibrium and non-equilibrium states of the YBCO–O₂system

Knizhnik¹,

Reisner²,

Shafir³

et al. 2004

Supercond. Sci. Technol.

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“…The same functions are obtained in Ref. [18,92], where a special apparatus based on the volumetric approach to maintain a constant the value of index z while heating or cooling the Y123 was used. The work of Ref.…”

Section: Oxygen Partial Propertiesmentioning

confidence: 90%

“…Expression (2) allows for the effect of hydrostatic pressure on the thermodynamic properties of phase, but for an accurate determination of the parameters W ri , l ri and j ri in (3), volume measurements at different T and P are needed. These data were usually calculated from the values of the crystal lattice parameters determined by means of XRD [14,17,18,21,[30][31][32][33][34][35] or NDA [16]. From these results crystal thermal expansion coefficients, compressibility, or bulk modulus can be also derived.…”

Section: Volume and Elastic Propertiesmentioning

confidence: 99%

Thermodynamic characterization of high-temperature superconductors in the yttrium-barium-copper-oxygen system. The Y123 solid solution (Technical Report)

Voronin

2000

Pure and Applied Chemistry

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Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the need for formal IUPAC permission on condition that an acknowledgment, with full reference to the source, along with use of the copyright symbol ©, the name IUPAC, and the year of publication, are prominently visible. Publication of a translation intoThermodynamic characterization of high-temperature superconductors in the yttrium-barium-copper-oxygen system. The Y123 solid solution Abstract: The aim of this report is to inform the chemical community about a selfconsistent thermodynamic data set for the YBa 2 Cu 3 O 6+z (1 ≥ z ≥ 0) solid solution, that is well known as the Y123 phase and possesses superconducting properties at z~1 and low temperatures. About 3300 experimental points obtained in 240 miscellaneous experiments published in 78 papers have been processed simultaneously in order to obtain the most reliable Gibbs energy function of the Y123 phase in the temperature range from 250 to 1300 K and pressures up to 100 kbar. A function is recommended for approximation of the Gibbs energy, which has 16 adjustable parameters. All other thermodynamic properties of the Y123 solution, including the conditions for its internal stability, can be derived from the assessed Gibbs energy. Brief descriptions of the thermodynamic model, experimental and data assessment methods as well as examples of self-consistent thermodynamic data applications are given.

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“…This can be read from the graph in Fig. 5(b), where the reflection positions calculated from the known 6-dependent lattice constants are plotted (McKinnon, Post, Selwyn & Pleizier, 1988;Verweij & Bruggink, 1989).…”

Section: Local Variation Of Lattice Constants and Of Crystallite Oriementioning

confidence: 99%

Simultaneous Position-Resolved Determination of Phase and Stress Distributions by means of an X-ray Diffractometer with a Two-Dimensional Position-Sensitive Detector

Stephan¹,

Grosse²,

Wetzig³

1995

J Appl Cryst

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With an X-ray area detector and a suitable Soller-plate collimator in the scattered radiation field, it is possible to realize a versatile X-ray diffractometer. The local diffraction information of a sample can be registered simultaneously and visualized with a spatial resolution better than 0.5 mm, maintaining reasonable measuring times of a few minutes. Results of measurements applied to local phase analysis (distribution of retained austenite and carbon on a cross section of case-hardened steel), to the determination of lateral stress distributions (laserhardened track on C45 steel) and to the analysis of crystallite orientation (coarse-grained YBa2Cu30~) are presented.

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Constant stoichiometry cooling of YBa2Cu3Ox

Cited by 33 publications

References 67 publications

Equilibrium and non-equilibrium states of the YBCO–O₂system

Equilibrium and non-equilibrium states of the YBCO–O₂system

Thermodynamic characterization of high-temperature superconductors in the yttrium-barium-copper-oxygen system. The Y123 solid solution (Technical Report)

Simultaneous Position-Resolved Determination of Phase and Stress Distributions by means of an X-ray Diffractometer with a Two-Dimensional Position-Sensitive Detector

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Constant stoichiometry cooling of YBa2Cu3Ox

Cited by 33 publications

References 67 publications

Equilibrium and non-equilibrium states of the YBCO–O2system

Equilibrium and non-equilibrium states of the YBCO–O2system

Thermodynamic characterization of high-temperature superconductors in the yttrium-barium-copper-oxygen system. The Y123 solid solution (Technical Report)

Simultaneous Position-Resolved Determination of Phase and Stress Distributions by means of an X-ray Diffractometer with a Two-Dimensional Position-Sensitive Detector

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Equilibrium and non-equilibrium states of the YBCO–O₂system

Equilibrium and non-equilibrium states of the YBCO–O₂system