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NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J

Bibliographic Information

Title: Thermal Conductivity in the ab Plane of Untwinned YBa2Cu3O7-δ
Author(s): J.L. Cohn, E.F. Skelton, S.A. Wolf, J.Z. Liu, and R.N. Shelton
Publication: Physical Review B Volume: 45 Issue: 22 Year: 1992 Page(s): 13144-13147
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: Not Available
Keywords: Material Specification, Thermal Conductivity

Materials and Properties

Y:123; [Y-Ba-Cu-O]
Material Specification for Y:123; [Y-Ba-Cu-O] Process: Flux Growth
Notes: The authors cite D.L. Kaiser et al., J. Cryst. Growth, Vol. 85 (1987) 593, and summarize the procedure as follows. "The crystal used in this study had dimensions 1.2 x 0.65 x 0.04 mm3 and was grown in a gold crucible by a self-flux method and detwinned by annealing under uniaxial stress. Examination of the specimen... before and after the oxygen anneal (100 h at 460 °C in flowing oxygen) confirm... oxygen deficiencies... to be... 0.11 and 0.08 before and after the anneal, respectively."
Formula: YBa2Cu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Thermal Conductivity for Y:123; [Y-Ba-Cu-O]
Axis () Condition () Temperature (K) Thermal Conductivity (W m-1 K-1)
a postanneal 11 21.6
a postanneal 16 24.9
a postanneal 25 27.0
a postanneal 27 27.9
a postanneal 35 28.4
a postanneal 49 27.2
a postanneal 64 21.6
a postanneal 80 16.6
a postanneal 86 14.8
a postanneal 95 13.4
a postanneal 117 13.3
a postanneal 148 13.2
a postanneal 176 13.1
a postanneal 198 13.0
b postanneal 12 20.4
b postanneal 15 21.7
b postanneal 20 23.2
b postanneal 24 23.9
b postanneal 29 23.8
b postanneal 30 24.1
b postanneal 32 24.1
b postanneal 32 24.4
b postanneal 39 24.3
b postanneal 46 23.9
b postanneal 55 21.7
b postanneal 69 18.4
b postanneal 79 15.9
b postanneal 89 13.9
b postanneal 98 13.3
b postanneal 122 13.4
b postanneal 153 13.4
b postanneal 196 13.6
a preanneal 10 11.4
a preanneal 14 13.0
a preanneal 20 16.0
a preanneal 32 19.8
a preanneal 41 21.2
a preanneal 55 19.5
a preanneal 69 16.3
a preanneal 72 15.1
a preanneal 79 13.0
a preanneal 91 11.4
a preanneal 109 11.1
a preanneal 129 11.1
a preanneal 157 10.9
a preanneal 197 11.0
b preanneal 9 10.3
b preanneal 16 12.9
b preanneal 26 15.6
b preanneal 35 17.5
b preanneal 46 18.5
b preanneal 65 15.9
b preanneal 78 13.6
b preanneal 85 11.7
b preanneal 97 11.3
b preanneal 117 11.5
b preanneal 155 11.7
b preanneal 198 11.7
Measurement Method: Steady-state method
"The thermal conductivity was measured by a steady-state method employing a differential Chromel-Constantan thermocouple and a small heater, glued to the specimen with varnish. A copper radiation shield was maintained at a temperature close to that of the specimen during measurement. The temperature gradient during measurement was typically 0.5-2.0 K/mm and linearity in the ΔT response was confirmed by varying the heater power."

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.