Table 2.

The fitting parameters of impedance spectra at various temperatures for the glass-ceramic prepared at 490 °C for 12 h.

Sample 490 C-12 h	Equivalent Circuit Parameters
Temperature	R (Ω)	CPE 1		CPE 2
		A1 (sα Ω−1)	α 1	A2 (sα Ω−1)	α 2
−30 °C	1.14 × 1012	3.61 × 10−12	0.76	-	-
0 °C	3.78 × 1010	8.52 × 10−12	0.74	-	-
30 °C	1.65 × 109	2.21 × 10−11	0.74	-	-
60 °C	2.17 × 108	3.87 × 10−11	0.74	2.78 × 10−7	0.34
90 °C	3.27 × 107	6.58 × 10−11	0.73	1.14 × 10−6	0.39
120 °C	6.28 × 106	1.03 × 10−10	0.73	3.50 × 10−6	0.47
150 °C	2.12 × 106	1.52 × 10−10	0.72	3.89 × 10−6	0.63
180 °C	5.39 × 105	1.91 × 10−10	0.72	7.42 × 10−6	0.56
210 °C	1.85 × 105	2.65 × 10−10	0.71	1.35 × 10−5	0.55
240 °C	7.08 × 104	3.09 × 10−10	0.72	1.79 × 10−5	0.53