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Table 2 Dielectric constant ε′ for doped YBCO ceramic samples at 50 Hz and 1 MHz at 120°C

From: YBCO as a transition metal oxide ceramic material for energy storage

Sample Mn3O4 Co3O4 Cr2O3
YBCO + x 50 Hz 1 MHz 50 Hz 1 MHz 50 Hz 1 MHz
X = 0.1 1.34 × 105 9.24 7.86 × 104 5.34 × 101 5.93 × 105 3.53 × 103
X = 0.2 3.26 × 104 8.98 4.42 × 106 8.16 × 102 7.27 × 105 3.10 × 103
X = 0.3 1.16 × 106 9.25 × 102 2.15 × 105 6.01 × 101 5.43 × 105 2.50 × 103
X = 0.4 7.04 × 105 1.95 × 103 3.66 × 104 2.24 × 101 9.45 × 102 2.07 × 101
X = 0.5 1.50 × 105 4.96 × 102 1.38 × 105 3.31 × 101 8.23 × 104 2.70 × 101