Y2O3 in 9.93 cm3 ethanol (C2H5OH) | 2.26 g | 2.26 g | 2.26 g | 2.26 g | 2.26 g |
BaCl2 in 10.80 cm3 water | 4.16 g | 4.16 g | 4.16 g | 4.16 g | 4.16 g |
CuO in 8.37 cm3 HCl | 4.77 g | 4.77 g | 4.77 g | 4.77 g | 4.77 g |
CaO in 8.37 cm3 HCl (commercial grade) | – | – | – | 2.24 | 2.24 |
CaO in 8.37 cm3 HCl (eggshell) | – | 2.24 g | 2.24 g | – | – |
NaOH (pH) | – | – | Adjust the pH to 11 | – | Adjust the pH to 11 |
Encoded sample | YBa2Cu3O7− |
YCaBa2Cu3O7− |
YBa2Cu3O7− |
YCaBa2Cu3O7− |
YCaBa2Cu3O7− |
Firing temperature (°C) | |||||
900 | YBCO-900-ref | YCaBCO-900-eggshell | YCaBCO-NaOH-900-eggshell | YCaBCO-900-com grade | YCaBCO-NaOH-900-com grade |
1,000 | YBCO-1000-ref | YCaBCO-1000-eggshell | YCaBCO-NaOH-1000-eggshell | YCaBCO-900-com grade | YCaBCO-NaOH-1000-com grade |
Yttrium oxide (Y2O3) | 5.03 | – | ✓ | Slightly soluble |
Barium chloride (BaCl2) | 3.10 | ✓ | – | – |
Calcium oxide (CaO) from eggshell, pH 12 | 2.46 | – | – | ✓ |
Calcium oxide (CaO), commercial grade, pH 12.6 | 3.34 | – | – | ✓ |
Copper oxide (CuO) | 6.51 | – | – | ✓ |
CuO | 1.0 × 106 | 5.63 ± 0.42 | 7.08 ± 0.010 | 1.158 ± 0.087 | 0.122 ± 0.053 |
Y2O3 | 1.0 × 106 | 64.75 ± 0.29 | 0.622 ± 0.003 | 13.526 ± 0.061 | 0.128 ± 0.057 |
BaCl2 | 1.0 × 106 | 21.88 ± 0.63 | 1.83 ± 0.052 | 4.535 ± 0.130 | 0.155 ± 0.068 |
CaO (commercial grade) | 1.0 × 106 | 55.37 ± 2.71 | 0.743 ± 0.035 | 11.794 ± 0.578 | 0.130 ± 0.056 |
CaO (from eggshell) | 1.0 × 106 | 0.47 ± 0.01 | 87.90 ± 1.720 | 0.099 ± 0.002 | 0.168 ± 0.073 |
YBCO-900-ref | 1.0 × 106 | 107.59 ± 0.46 | (5.40 ± 0.02) × 106 | 24.341 ± 0.103 | 0.159 ± 0.069 |
YBCO-1000-ref | 1.0 × 106 | 257.25 ± 1.70 | (2.26 ± 0.01) × 106 | 58.200 ± 0.400 | 0.159 ± 0.070 |
YCaBCO-900-eggshell | 1.0 × 106 | 132.02 ± 0.90 | (4.28 ± 0.03) × 106 | 30.740 ± 0.200 | 0.213 ± 0.010 |
YCaBCO-1000-eggshell | 1.0 × 106 | 121.50 ± 1.30 | (4.63 ± 0.05) × 106 | 28.391 ± 0.300 | 0.213 ± 0.090 |
YCaBCO-NaOH-900-eggshell | 1.0 × 106 | 177.84 ± 0.40 | (3.42 ± 0.008) × 106 | 38.47 ± 0.10 | 0.171 ± 0.010 |
YCaBCO-NaOH-1000-eggshell | 1.0 × 106 | 145.65 ± 1.47 | (4.09 ± 0.04) × 106 | 32.11 ± 0.32 | 0.171 ± 0.074 |
YCaBCO-900-com grade | 1.0 × 106 | 130.32 ± 1.21 | (4.43 ± 0.04) × 106 | 29.70 ± 0.28 | 0.159 ± 0.069 |
YCaBCO-1000-com grade | 1.0 × 106 | 118.55 ± 0.87 | (4.78 ± 0.04) × 106 | 27.51 ± 0.20 | 0.159 ± 0.069 |
YCaBCO-NaOH-900-com grade | 1.0 × 106 | 177.84 ± 0.42 | (3.42 ± 0.01)×106 | 38.47 ± 0.09 | 0.171 ± 0.007 |
YCaBCO-NaOH-1000-com grade | 1.0 × 106 | 146.83 ± 2.38 | (4.30 ± 0.07)×106 | 30.55 ± 0.50 | 0.161 ± 0.071 |