Material Specification for Bi:221; [Bi-Sr-Cu-O]
Process: Solid State Reaction
Notes: "... powders were synthesized by reaction of appropriate mixtures of Bi2O3, PbO, SrCO3, CaCO3, and CuO; PbO was used for the 2223 to stabilize the 2223 structure... The powders were ball-milled for 16-24 h in polyethylene jars containing isopropyl alcohol and ZrO2 grinding media. The milled powders were pan-dried, ground lightly with an agate mortar and pestle, placed into Al2O3 crucibles, and heated according to various schedules. The 2201 was heated in air at 735 °C for 23 h and then at 805 °C for 40 h. The 2212 was first heated at 720 °C in O2 at 3 x 102 Pa for 24 h. The atmosphere was changed in air and the powder was heated to 890 °C for 0.2 h and then at 842 °C for 100 h. The 2223 was heated in air at 835 °C for 50 h, remilled with ZrO2 media, and then heated in air at 850 °C for 50 h. All of the powders were communicated in a tungsten carbide rotary mill... All powders were processed into bulk forms by sinter forging in air at 830-850 °C. The powders were first cold-pressed into bars that were (about) 50% dense. The bars were compressed between Al2O3 rams. Ag foil was placed between the bars and the rams to prevent contamination. The compression rates during forging were 0.01-0.05 mm/min and the final stresses were (about) 10 MPa. The final products were 92-95% dense and highly textured, with the c-axes parallel to the compression direction during sinter forging. Specimens for the diffusion tests were cut from the bars with a slow-speed diamond saw. The diffusion direction was in all cases perpendicular to the forging direction. Thus, diffusion occurred primarily in the a-b planes."
Formula: Bi2.12Sr1.88CuOx
Informal Name: Bi:221
Chemical Family: Bi-Sr-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Diffusion Coefficient for Bi:221; [Bi-Sr-Cu-O]
| Diffusing Species () |
Temperature (°C) |
Diffusion Time (days) |
P(O2) (kPa) |
Diffusion Coefficient (log10(cm2/s)) |
| Sr |
775 |
40 |
100 |
-12.5 |
| Sr |
800 |
18 |
100 |
-12.0 |
| Sr |
824 |
14 |
100 |
-11.6 |
| Sr |
850 |
6 |
100 |
-11.2 |
| Sr |
850 |
3 |
100 |
-11.1 |
| Sr |
800 |
17 |
10 |
-11.7 |
| Sr |
800 |
17 |
1 |
-11.0 |
Measurement Method: Tracer diffusion
"The results presented here were obtained with the tracer (Sr) that was evaporated onto the BSCCO surface in a vacuum of 1.3x10
-2 Pa... The samples were annealed in quartz capsules that had been backfilled with oxygen and sealed to yield the correct oxygen partial pressure during the diffusion anneal. Serial sectioning was performed by grinding and the activity of each section was measured in a well-type Tl-activated NaI scintillation counter. The diffusion coefficients were determined by fitting penetration plots to a complementary error function solution of Fick's second law..."
Cautions: Evaluated Data
Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "... powders were synthesized by reaction of appropriate mixtures of Bi2O3, PbO, SrCO3, CaCO3, and CuO; PbO was used for the 2223 to stabilize the 2223 structure... The powders were ball-milled for 16-24 h in polyethylene jars containing isopropyl alcohol and ZrO2 grinding media. The milled powders were pan-dried, ground lightly with an agate mortar and pestle, placed into Al2O3 crucibles, and heated according to various schedules. The 2201 was heated in air at 735 °C for 23 h and then at 805 °C for 40 h. The 2212 was first heated at 720 °C in O2 at 3 x 102 Pa for 24 h. The atmosphere was changed in air and the powder was heated to 890 °C for 0.2 h and then at 842 °C for 100 h. The 2223 was heated in air at 835 °C for 50 h, remilled with ZrO2 media, and then heated in air at 850 °C for 50 h. All of the powders were communicated in a tungsten carbide rotary mill... All powders were processed into bulk forms by sinter forging in air at 830-850 °C. The powders were first cold-pressed into bars that were (about) 50% dense. The bars were compressed between Al2O3 rams. Ag foil was placed between the bars and the rams to prevent contamination. The compression rates during forging were 0.01-0.05 mm/min and the final stresses were (about) 10 MPa. The final products were 92-95% dense and highly textured, with the c-axes parallel to the compression direction during sinter forging. Specimens for the diffusion tests were cut from the bars with a slow-speed diamond saw. The diffusion direction was in all cases perpendicular to the forging direction. Thus, diffusion occurred primarily in the a-b planes."
Formula: Bi2Sr1.7CaCu2Ox
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Diffusion Coefficient for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Diffusing Species () |
Temperature (°C) |
Diffusion Time (days) |
P(O2) (kPa) |
Diffusion Coefficient (log10(cm2/s)) |
| Sr |
775 |
40 |
100 |
-12.1 |
| Sr |
800 |
18 |
100 |
-11.5 |
| Sr |
824 |
14 |
100 |
-11.0 |
| Sr |
850 |
6 |
100 |
-10.3 |
| Sr |
850 |
3 |
100 |
-10.2 |
| Sr |
800 |
17 |
10 |
-11.3 |
| Sr |
800 |
17 |
1 |
- 8.7 |
Measurement Method: Tracer diffusion
"The results presented here were obtained with the tracer (Sr) that was evaporated onto the BSCCO surface in a vacuum of 1.3x10
-2 Pa... The samples were annealed in quartz capsules that had been backfilled with oxygen and sealed to yield the correct oxygen partial pressure during the diffusion anneal. Serial sectioning was performed by grinding and the activity of each section was measured in a well-type Tl-activated NaI scintillation counter. The diffusion coefficients were determined by fitting penetration plots to a complementary error function solution of Fick's second law..."
Cautions: Evaluated Data
Material Specification for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "... powders were synthesized by reaction of appropriate mixtures of Bi2O3, PbO, SrCO3, CaCO3, and CuO; PbO was used for the 2223 to stabilize the 2223 structure... The powders were ball-milled for 16-24 h in polyethylene jars containing isopropyl alcohol and ZrO2 grinding media. The milled powders were pan-dried, ground lightly with an agate mortar and pestle, placed into Al2O3 crucibles, and heated according to various schedules. The 2201 was heated in air at 735 °C for 23 h and then at 805 °C for 40 h. The 2212 was first heated at 720 °C in O2 at 3 x 102 Pa for 24 h. The atmosphere was changed in air and the powder was heated to 890 °C for 0.2 h and then at 842 °C for 100 h. The 2223 was heated in air at 835 °C for 50 h, remilled with ZrO2 media, and then heated in air at 850 °C for 50 h. All of the powders were communicated in a tungsten carbide rotary mill... All powders were processed into bulk forms by sinter forging in air at 830-850 °C. The powders were first cold-pressed into bars that were (about) 50% dense. The bars were compressed between Al2O3 rams. Ag foil was placed between the bars and the rams to prevent contamination. The compression rates during forging were 0.01-0.05 mm/min and the final stresses were (about) 10 MPa. The final products were 92-95% dense and highly textured, with the c-axes parallel to the compression direction during sinter forging. Specimens for the diffusion tests were cut from the bars with a slow-speed diamond saw. The diffusion direction was in all cases perpendicular to the forging direction. Thus, diffusion occurred primarily in the a-b planes."
Formula: Bi1.8Pb0.4Sr2Ca2.2Cu3Ox
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:
Diffusion Coefficient for Bi:2223; [Bi(Pb)-Sr-Ca-Cu-O]
| Diffusing Species () |
Temperature (°C) |
Diffusion Time (days) |
P(O2) (kPa) |
Diffusion Coefficient (log10(cm2/s)) |
| Sr |
775 |
30 |
100 |
-12.5 |
| Sr |
800 |
18 |
100 |
-11.4 |
| Sr |
825 |
14 |
100 |
-11.4 |
| Sr |
850 |
3 |
100 |
-10.6 |
Measurement Method: Tracer diffusion
"The results presented here were obtained with the tracer (Sr) that was evaporated onto the BSCCO surface in a vacuum of 1.3x10
-2 Pa... The samples were annealed in quartz capsules that had been backfilled with oxygen and sealed to yield the correct oxygen partial pressure during the diffusion anneal. Serial sectioning was performed by grinding and the activity of each section was measured in a well-type Tl-activated NaI scintillation counter. The diffusion coefficients were determined by fitting penetration plots to a complementary error function solution of Fick's second law..."
Cautions: Evaluated Data
