Preparation of CoFe₂O₄/SiO₂ Nanocomposites at Low Temperatures Using Short Chain Diols

Table 3

Thermodynamic parameters at different temperatures for CoO, SiO₂, and Fe₂O₃.

(°C)	(cal/mol·K)			Δ (kcal/mol)			(cal/mol·K)			Δ (kcal/mol)
	CoO	Fe2O3	SiO2	CoO	Fe2O3	SiO2	CoO	Fe2O3	SiO2	CoO	Fe2O3	SiO2
25	12.6	2560	2471	−57.1	−58.1	4.7	12.7	31.1	26.5	−60.9	−67.4	−3.2
100	12.6	3409	3291	−55.8	240	293	16.4	884	850	−62.4	−113	−47.1
200	12.7	4258	4111	−54.6	624	663	19.4	1736	1672	−64.1	−244	−173
300	12.9	5107	4931	−53.3	1092	115	21.5	2587	2494	−66.2	−460	−381
400	13.0	5956	5751	−52.0	1645	1649	23.5	3438	3316	−68.4	−761	−672
500	13.2	6805	6571	−50.7	2283	2265	25.3	4288	4137	−70.9	−1148	−1045
600	13.4	7654	7391	−49.3	3006	2963	26.8	5139	4959	−73.5	−1619	−1499
700	13.6	8503	8211	−48.0	3814	3744	28.3	5989	5780	−76.2	−2176	−2036
800	13.8	9352	9031	−46.6	4706	4606	29.6	6839	6601	−79.1	−2817	−2655
900	14.0	10201	9851	−45.2	5684	5550	30.8	7690	7422	−82.2	−3543	−3357