Preparation of Nanosized LaCoO₃ through Calcination of a Hydrothermally Synthesized Precursor

Table 1

Phase and elemental composition of the precursor powder and the samples obtained at different calcination temperature.

(°C)	Phase composition; (XRD)	La : Co : O, at.%; (EDS average)
Precursor	La(OH)3 + Co3O4	12.16 : 13.73 : 73.01
380	La(OH)3 + LaO(OH) + Co3O4	11.48 : 14.19 : 74.33
490	LaO(OH) + Co3O4	20.08 : 22.38 : 57.54
740	La2O3 + Co3O4 + LaCoO3	20.69 : 23.50 : 55.81
850	La2O3 + Co3O4 + LaCoO3	20.95 : 22.02 : 57.02
950	La2O3 + LaCoO3	29.47 : 26.32 : 44.21
1050	LaCoO3	30.37 : 27.85 : 41.78

Majority phase.