The effect of the synthesis temperature of hollow microspheres of cadmium ferrite in the spray pyrolysis process was studied. Samples of cadmium ferrite were synthesized in the range of 700‒1000 ˚C with a step of 100 ˚C. The morphology, granulometric composition, phase and elemental composition of the obtained samples were studied, and studies were also carried out using the thermogravimetry method.