Material Specification for Bi:221; [Bi(Pb)-Sr-Ca-Cu-O]
Process: Melt Processed
Notes: The authors cite I. Matsubara et al., Jpn. J. Appl. Phys., Vol. 28 (1989) L1121, and summarize the procedure as follows. "Powders of Bi2O3, SrCO3, CaCO3 and CuO and PbO... were carefully mixed together using a Pyrex mortar. The mixture was melted in an alumina crucible at 1150 °C for several minutes in air. The melt was quenched to room temperature in about 1 second by pouring on a cast iron plate and pressing with a steel plate... Pieces of this glassy material were then placed in ceramic boats and heated at 830 °C in a flowing oxygen atmosphere for several days. The samples were cooled to room temperature at a rate of about 5 K/s. Whisker-like crystals with typical dimensions of (2-5 mm) x (10-200 µm) x (1-10 µm) grew out of some sections of the quenched sheets."
Formula: Bi2-xPbxSr2Ca
CuyOz
Informal Name: Bi:221
Chemical Family: Bi(Pb)-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Bi:221; [Bi(Pb)-Sr-Ca-Cu-O]
| Tensile Stress (GPa) |
Critical Temperature (K) |
| 0.00 |
75.2 |
| 0.05 |
74.8 |
| 0.10 |
74.4 |
| 0.15 |
73.9 |
| 0.20 |
73.5 |
Measurement Method: Four-probe method
"...the samples were mounted on a quartz puller... Uniaxial stress (σ) was applied along the needle axis (the a direction) and, the resulting strain (ε) along the a direction was measured as well as the four-probe DC resistance R. Thermal voltages were compensated by switching the direction of the current."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
