YBCO as a transition metal oxide ceramic material for energy storage

Bulletin of the National Research Centre

Table 3 The values of s and hopping frequency for the study composites at room temperature and 120°C

Sample	Mn₃O₄			Co₃O₄			Cr₂O₃
YBCO + x		Room temp.	120 °C		Room temp.	120 °C		Room temp.	120 °C
YBCO + x	ω _p	S	S	ω _p	S	S	ω _p	S	S
YBCO	6.28 × 10⁶	0.237	0.107	6.28 × 10⁶	0.237	0.107	6.28 × 10⁶	0.237	0.107
X = 0.1	6.28 × 10⁶	0.205	0.191	6.28 × 10⁶	0.194	0.064	6.28 × 10⁵	0.133	0.077
X = 0.2	6.28 × 10⁶	0.191	0.190	6.28 × 10⁶	0.285	0.135	6.28 × 10⁵	0.264	0.189
X = 0.3	6.28 × 10⁶	0.222	0.237	6.28 × 10⁶	0.962	0.277	6.28 × 10⁵	0.543	0.195
X = 0.4	3.14 × 10⁶	0.048	−0.245	6.28 × 10⁶	0.291	0.175	6.28 × 10⁵	0.687	1.334
X = 0.5	6.28 × 10⁶	0.423	0.407	6.28 × 10⁶	0.187	0.172	6.28 × 10⁶	0.263	0.212