Abstract Nano-crystalline Ce1-xNdxO2-x/2 (0≤x≤0.6) powders were prepared by low temperature combustion process with citrate acid-nitrate system. The influences of the Nd3+ doping constant on the powders phase structure, morphology and particle size were studied. TG/DSC curves and XRD patterns show that a slightly fuel-deficient ratio resulted in smaller particle size. XRD results indicate that the as-prepared powders were single fluorite structure with crystalline size ranging from 15 to 24 nm. The lattice constant increases with the increase of the doping constant x. TEM micrograph shows that the particles size ranges from 30 to 40nm. The broader Raman band at 580cm-1 is attributed to the presence of oxygen vacancies, which increase with the increase of the doping constant. The XRF shows that the actual doping density is close to the original chemical composition ratio
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