Material Specification for Bi:221; [Bi-Sr-Cu-O]
Process: Solid State Reaction
Notes: "Mixtures of appropriate amounts of high-purity Bi2O3 (99.9999), SrCO3, (99.999), and CuO (99.999) were first dry ball milled in an agate container for 1 h and then melted in a Pt crucible. After CO2 evolution ceased, the molten oxide mixture was splat quenched between a Cu hammer and a Cu plate. The pieces obtained were typically 150 to 200 µm thick and had areas up to 6 cm2. These glassy precursors were placed in a gold boat, heat-treated in O2, and slowly cooled to room temperature."
Formula: Bi2+xSr2-yCuOz
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:
Crystallography for Bi:221; [Bi-Sr-Cu-O]
| Crystal System: | Tetragonal |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
| x of Bi2+x (formula units) |
y of Sr2-y (formula units) |
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 0 |
0.00 |
296 |
5.384 |
-- |
24.701 |
| 0 |
0.15 |
296 |
5.372 |
-- |
24.609 |
| 0 |
0.30 |
296 |
5.378 |
-- |
24.597 |
| 0 |
0.50 |
296 |
5.390 |
-- |
24.539 |
| 0.15 |
0.15 |
296 |
5.377 |
-- |
24.610 |
| 0.30 |
0.30 |
296 |
5.394 |
-- |
24.558 |
Measurement Method: X-ray diffraction
"The sample structure was characterized using x-ray diffraction (Rigaku, CuK
α). For high temperature in situ x-ray diffraction, a standard high temperature furnace attachment and a temperature controller provided by Rigaku were used. Two Pt-PtRh (13%) thermocouples were employed in the furnace. The temperature fluctuation across the sample was estimated to be less than 2 °C, and the stability of the sample temperature was ±3 °C."
Cautions: Evaluated Data
