Material Specification for Bi:1112; [Bi-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "Sample A was prepared from a mixture of powders of Bi2O3, SrCO3, CaCO3, and CuO at the atomic ratio of Bi:Sr:Ca:Cu=1:1:1:2. The mixture was thoroughly ground and annealed at 820 °C for 12 h, and this process was repeated. The material was then reground and isotropically pressured (0.38 GPa = 55 x 103 psi). The pellet was annealed at 865 °C for 120 h in air. Samples B and C were prepared with the same starting materials using a standard coevaporation process. Powders were mixed in an atomic ratio of Bi:Sr:Ca:Cu=2:2:1:2 and dissolved in HNO3. The solution was heated on a hotplate until thick and then baked at 200 °C in an alumina crucible until a dry powder was obtained. The powder was reground and annealed for 12 h at 850 °C. This process was repeated twice for a total anneal time of 36 h. Finally, the material was hot pressed in an argon atmosphere at 1 MPa at 800 °C for 30 min. Samples B and C were cut from this pellet with their long axes perpendicular and parallel to the pressing direction, respectively."
Formula: BiSrCaCu2Ox
Informal Name: Bi:1112
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Resistivity (normal state) for Bi:1112; [Bi-Sr-Ca-Cu-O]
| Sample Number () |
Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
| A |
105 |
0.1 |
| A |
110 |
1.4 |
| A |
115 |
1.9 |
| A |
120 |
2.2 |
| A |
150 |
2.9 |
| A |
200 |
3.8 |
| A |
250 |
4.8 |
Measurement Method: Four-probe method
"The electrical resistivity (was) determined by a four-probe technique." No additional measurement details were noted.
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Thermal Conductivity for Bi:1112; [Bi-Sr-Ca-Cu-O]
| Sample Number () |
Temperature (K) |
Thermal Conductivity (W m-1 K-1) |
| A |
24 |
0.56 |
| A |
39 |
0.77 |
| A |
56 |
0.95 |
| A |
65 |
1.02 |
| A |
74 |
1.02 |
| A |
76 |
1.03 |
| A |
84 |
1.01 |
| A |
86 |
0.99 |
| A |
92 |
0.99 |
| A |
105 |
0.97 |
| A |
106 |
0.95 |
| A |
120 |
0.96 |
| A |
166 |
1.05 |
| A |
190 |
1.11 |
Measurement Method: Steay-state method
"Investigations of the thermal conductivity was carried out by a steady-state technique and cooling was provided by a dilution refrigerator. As temperature sensors, we used Ge thermometers with calibrations traceable to NBS standards, and stability checked against superconducting fixed-point devices. The heater is a small metal-film resistor attached on the free end of the sample. All electrical leads are made of very thin and long cupro-nickel-clad Nb-Ti superconductor wires in order to limit any stray heat to or from the sample."
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "Sample A was prepared from a mixture of powders of Bi2O3, SrCO3, CaCO3, and CuO at the atomic ratio of Bi:Sr:Ca:Cu=1:1:1:2. The mixture was thoroughly ground and annealed at 820 °C for 12 h, and this process was repeated. The material was then reground and isotropically pressured (0.38 GPa = 55 x 103 psi). The pellet was annealed at 865 °C for 120 h in air. Samples B and C were prepared with the same starting materials using a standard coevaporation process. Powders were mixed in an atomic ratio of Bi:Sr:Ca:Cu=2:2:1:2 and dissolved in HNO3. The solution was heated on a hotplate until thick and then baked at 200 °C in an alumina crucible until a dry powder was obtained. The powder was reground and annealed for 12 h at 850 °C. This process was repeated twice for a total anneal time of 36 h. Finally, the material was hot pressed in an argon atmosphere at 1 MPa at 800 °C for 30 min. Samples B and C were cut from this pellet with their long axes perpendicular and parallel to the pressing direction, respectively."
Formula: Bi2Sr2CaCu2Ox
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Resistivity (normal state) for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Sample Number () |
Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
| B |
80 |
2.0 |
| B |
90 |
6.8 |
| B |
100 |
8.0 |
| B |
110 |
8.3 |
| B |
120 |
8.6 |
| B |
150 |
8.9 |
| B |
200 |
9.2 |
| B |
250 |
9.2 |
| C |
80 |
18 |
| C |
90 |
35 |
| C |
100 |
38 |
| C |
110 |
40 |
| C |
120 |
41 |
| C |
150 |
42 |
| C |
160 |
42 |
| C |
200 |
41 |
| C |
250 |
40 |
Measurement Method: Four-probe method
"The electrical resistivity (was) determined by a four-probe technique." No additional measurement details were noted.
Cautions: Evaluated Data
No measurement details were noted. Digitized data were obtained from Figure 2 of the paper.
Thermal Conductivity for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Sample Number () |
Temperature (K) |
Thermal Conductivity (W m-1 K-1) |
| B |
0.1 |
0.00014 |
| B |
0.5 |
0.0026 |
| B |
1.0 |
0.011 |
| B |
2.0 |
0.043 |
| B |
4.0 |
0.18 |
| C |
0.1 |
0.00004 |
| C |
0.5 |
0.0018 |
| C |
1.0 |
0.0089 |
| C |
2.0 |
0.043 |
| C |
4.0 |
0.18 |
Measurement Method: Steay-state method
"Investigations of the thermal conductivity was carried out by a steady-state technique and cooling was provided by a dilution refrigerator. As temperature sensors, we used Ge thermometers with calibrations traceable to NBS standards, and stability checked against superconducting fixed-point devices. The heater is a small metal-film resistor attached on the free end of the sample. All electrical leads are made of very thin and long cupro-nickel-clad Nb-Ti superconductor wires in order to limit any stray heat to or from the sample."
Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
