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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: Superconducting Properties and Microstructures of the Powder Melting Processed Y-Ho-Ba-Cu-O and Y-Gd-Ba-Cu-O Super- conductors
Author(s): F. Yong and Z. Lian
Publication: Physica C Volume: 202 Issue: Not Available Year: 1992 Page(s): 298-302
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Current Density

Materials and Properties

Ho:123; [Ho(Y)-Ba-Cu-O]
Gd:123; [Gd(Y)-Ba-Cu-O]
Material Specification for Ho:123; [Ho(Y)-Ba-Cu-O] Process: Melt Processed
Notes: "... powders were prepared by using Y2O3, Ho2O3, Gd2O3, BaCO3 and CuO through a powder sintering process. These powders were well mixed and cold pressed into a rectangular shape. Bars with dimensions of 0.8-1 x 1-1.2 x 30-80 mm3 were obtained and used as starting materials. These specimens were put into a tube furnace with a temperature gradient of 50-100 °C/cm for the melting process. The highest temperature in the melt zone... was 1010-1080 °C. The moving rate of the sample was between 0.8-3 mm/h. Finally, the samples were annealed at 500-600 °C for 40-60 h in oxygen."
Formula: Ho1-xYxBa2Cu3Oy
Informal Name: Ho:123
Chemical Family: Ho(Y)-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Current Density for Ho:123; [Ho(Y)-Ba-Cu-O]
x of Yx (formula units) Temperature (K) Magnetic Field (T) Critical Current Density (kA/cm2)
0.4 77 0.5 37
0.4 77 0.8 33
0.4 77 1.0 29
0.0 77 0.2 35
0.0 77 0.5 23
0.0 77 0.8 18
0.0 77 1.0 16
Measurement Method: Pulsed current method
"The critical currents were measured by a pulse current method, with a voltage criterion of 3 µV/cm. The cross-section of the sample was about 0.4 mm2." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for Gd:123; [Gd(Y)-Ba-Cu-O] Process: Melt Processed
Notes: "... powders were prepared by using Y2O3, Ho2O3, Gd2O3, BaCO3 and CuO through a powder sintering process. These powders were well mixed and cold pressed into a rectangular shape. Bars with dimensions of 0.8-1 x 1-1.2 x 30-80 mm3 were obtained and used as starting materials. These specimens were put into a tube furnace with a temperature gradient of 50-100 °C/cm for the melting process. The highest temperature in the melt zone... was 1010-1080 °C. The moving rate of the sample was between 0.8-3 mm/h. Finally, the samples were annealed at 500-600 °C for 40-60 h in oxygen."
Formula: Gd1-xYxBa2Cu3Oy
Informal Name: Gd:123
Chemical Family: Gd(Y)-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Current Density for Gd:123; [Gd(Y)-Ba-Cu-O]
x of Yx (formula units) Temperature (K) Magnetic Field (T) Critical Current Density (kA/cm2)
0.4 77 0.5 16
0.4 77 0.8 13
0.4 77 1.0 9
Measurement Method: Pulsed current method
"The critical currents were measured by a pulse current method, with a voltage criterion of 3 µV/cm. The cross-section of the sample was about 0.4 mm2." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.