Material Specification for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "Specimens were prepared by solid-state reaction with an intermediate pressing. Coprecipitated powder with a nominal composition of Bi: Pb: Sr: Ca: Cu = 1.6: 0.4: 2.0: 2.0: 3.0 was calcined at 750 °C for 12 hours in air. After powdering, the powder was pressed into a shape of a slab with a dimension of 3 x 1 x 20 mm3 and then sintered at 845 °C in N2-50%O2. The sintering was repeated three times with the intermediate pressing at several tons per square centimeter. Two slabs were prepared. The c-axis of each grain of the sintered specimens were preferentially oriented along the direction of the press. The specimens used for measurements were mechanically cut from the slabs. The c-axis was parallel to the wide surface and perpendicular to the long axis of the specimen... The typical size of the specimens was 1 mm in width, 0.2 mm in thickness and 20 mm in length."
Formula: Bi2-xPbxSr2Ca2Cu3O10+y
Informal Name: Bi:2223
Chemical Family: Bi(Pb)-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
| Critical Temperature (K) |
| 106 |
Measurement Method: Electrical resistance
Cautions: Unevaluated Data
No measurement details were noted.
Critical Current Density for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
| Temperature (K) |
Magnetic Field (T) |
Critical Current Density (kA/cm2) |
| 4.2 |
0.0 |
2.2 |
| 4.2 |
0.2 |
2.0 |
| 4.2 |
1.0 |
0.98 |
| 4.2 |
2.1 |
0.85 |
| 4.2 |
4.1 |
0.64 |
| 4.2 |
5.0 |
0.61 |
| 30 |
0.2 |
1.0 |
| 30 |
0.5 |
0.66 |
| 30 |
1.0 |
0.56 |
| 30 |
2.0 |
0.48 |
| 40 |
0.2 |
0.65 |
| 40 |
0.6 |
0.45 |
| 40 |
1.0 |
0.38 |
| 40 |
2.0 |
0.20 |
| 50 |
0.2 |
0.53 |
| 50 |
0.6 |
0.25 |
| 50 |
1.0 |
0.18 |
| 50 |
2.0 |
0.087 |
| 60 |
0.2 |
0.21 |
| 60 |
0.5 |
0.12 |
| 60 |
1.5 |
0.033 |
| 60 |
1.8 |
0.025 |
| 60 |
2.0 |
0.010 |
| 70 |
0.1 |
0.045 |
| 70 |
0.3 |
0.021 |
| 70 |
0.5 |
0.006 |
| 70 |
0.7 |
0.003 |
Measurement Method: Ac inductive method
"The critical current density was measured by the ac inductive method. Dc and superposed ac magnetic fields were applied along the length of the specimen... The frequency of the ac field was 35.0 Hz. The temperature of the specimen was controlled in the atmosphere of helium gas and varied in the range of 4.2-85 K. The critical current density induced by the ac field was estimated by analyzing ac flux penetrating the specimen. ... the observed critical current density is mostly the component flowing along the c-axis. But the anistropy between this component and the component in the basal plane is small. The irreversibility field was defined by the magnetic field at which the critical current density was reduced to 1.0 x 10
5 A/m
2."
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Irreversibility Field for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
| Temperature (K) |
Irreversibility Field (T) |
| 55 |
3.9 |
| 61 |
2.3 |
| 65 |
1.2 |
| 71 |
1.0 |
| 76 |
0.4 |
Measurement Method: Ac inductive method
"The critical current density was measured by the ac inductive method. Dc and superposed ac magnetic fields were applied along the length of the specimen... The frequency of the ac field was 35.0 Hz. The temperature of the specimen was controlled in the atmosphere of helium gas and varied in the range of 4.2-85 K. The critical current density induced by the ac field was estimated by analyzing ac flux penetrating the specimen. ... the observed critical current density is mostly the component flowing along the c-axis. But the anistropy between this component and the component in the basal plane is small. The irreversibility field was defined by the magnetic field at which the critical current density was reduced to 1.0 x 10
5 A/m
2."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
