Synthesis of CoFe₂O₄ Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties

Table 2

Characteristics of the cobalt ferrite particles differing in metal concentration, ionic strength, and calcination temperature.

Sample labeling	Ionic strength (M)	Concentration of cobalt precursor (mol·dm¯^3)	Concentration of iron precursor (mol·dm¯^3)	Calcination temperature (°C)	Amorphous phase (%)	(emu·g^-1)	(T)	(emu·g^-1)	(m^2·g^-1)	(cm^3/g)	(nm)	(nm)
S4	1.25	0.0425	0.0695	400	65	51	0.041	8.7	23	0.012	15	46	1.80
S5	2.5	0.085	0.1392	400	67	48	0.007	4.4	17	0.009	15	54	1.78
S6	5.0	0.17	0.2783	400	65	40	0.018	5.4	14	0.007	16	50	1.78
S7	1.25	0.0425	0.0695	600	53	50	0.021	7.9	15	0.008	16	44	1.75
S8	2.5	0.085	0.1392	600	56	51	0.024	8.7	11	0.006	15	47	1.75
S9	5.0	0.17	0.2783	600	53	40	0.009	4.6	8	0.004	17	47	1.75
S10	1.25	0.0425	0.0695	800	47	45	0.045	10.5	2	0.003	28	36	1.75
S11	2.5	0.085	0.1392	800	51	47	0.019	9.9	0.6	0.001	28	35	1.75
S12	5.0	0.17	0.2783	800	47	44	0.015	7.6	0.6	0.001	28	46	1.60
S13	5.0	0.0425	0.0695	400	n.m.	50	0.018	7.0	18	0.0089	15	55	1.78
S14	5.0	0.0425	0.0695	600	n.m.	51	0.008	6.7	15	0.0025	15	59	1.75
S15	5.0	0.0425	0.0695	800	n.m.	40	0.003	3.6	0.3	0.001	24	131	1.63