Sintering of cerium oxide is difficult due his reduction to Ce2O3 with an oxygen elimination accompanied by the pores formation. Due to this phenomena in composition of samples uses some addives which limits this effect. In this paper two types of samples were synthesized. The first of these has stoichiometric composition corresponding to binary compound SrCeO3. The second type of samples content 5 and 10% SrO respectively. The samples were thermally treated in the range 1250-1500°C and were studied the mechanisms formation of compounds based on the obtained results by X-ray diffraction. At SrCeO3 synthesis it observed that due reduction CeO2 to Ce2O3 an intermediate phase Sr2Ce2O5 was identified, this later compound being incongruent in solid phase. For a low SrO amount this compound not formed and SrCeO3, which is an equilibrium phase, penetrates in CeO2 network with the formation of a solid solution with fluorite structure. The microstructure of studied samples was examined by SEM microscopy.

 

 

 

 

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