Transport Critical Current Density of (Bi_1.6Pb_0.4)Sr₂Ca₂Cu₃O₁₀ Ceramic Superconductor with Different Nanosized Co₃O₄ Addition

Table 1

Zero-resistance temperature (𝑇_𝑐-zero), volume fraction, critical current density (𝐽_𝑐) at 30 K, and 77 K in self-field.

𝑥 (wt.%)	Volume fraction		𝑇𝑐-zero	𝐽𝑐 at 30 K	𝐽𝑐 at 77 K
	Bi-2223 (%)	Bi-2212 (%)	(±1 K)	(mA/cm^2)	(mA/cm^2)
(10 nm)
0	51	49	100	371	26
0.01	61	39	102	412	108
0.02	61	39	101	590	122
0.03	72	28	97	1232	358
0.04	63	37	99	725	342
0.05	51	49	95	986	82
(30 nm)
0	51	49	100	371	26
0.01	71	29	97	411	40
0.02	74	26	95	1742	878
0.03	67	33	91	1145	854
0.04	53	47	98	1025	731
0.05	47	53	94	440	236
(50 nm)
0	51	49	100	371	26
0.01	72	28	97	1389	923
0.02	44	56	97	1018	609
0.03	48	52	96	1262	508
0.04	37	63	95	755	250
0.05	37	63	93	428	170