Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: "Bulk ceramic samples were prepared using standard procedure. This involves a stoichiometric mixture of Y2O3, BaCO3, and CuO powders, which was either ball milled or, in order to achieve the smallest grain microstructure, attrition milled. The purity of the starting powders was 99.99% or greater. X-ray diffraction measurements of the calcined product (875 °C for attrition milled, 930 °C for ball milled) showed traces of second phases, which were identified as CuO and BaCuO2. The different microstructures were generated by varying the sintering temperature (900 to 975 °C), duration, and atmosphere (air or oxygen). Finally, the cooling cycle, 2 °C/min, includes an annealing step at 500 °C."
Formula: YBa2Cu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Elastic Modulus for Y:123; [Y-Ba-Cu-O]
| Relative Density (% theoretic) |
Average Grain Size (µm) |
Elastic Modulus (GPa) |
| 85 |
2 |
106 |
| 86 |
5 |
101 |
| 93 |
13 |
60 |
Measurement Method: Pulse-echo technique
"A high temperature pulse-echo technique was used to measure Young's modulus... The method... involves an alumina waveguide to transmit low frequency ultrasonic waves (260 kHz) to samples prepared in the form of bars with dimensions 3 x 3 x 20/mm
3. Heating and cooling rates were typically 1 °C/min and the sample temperature is considered to be accurate to ±5 °C.... Densities of sintered samples were evaluated using Archimede's principle."
Cautions: Evaluated Data
