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T1-2212 superconducting films were fabricated on r-cut sapphire substrates buffered with (001)-oriented CeO2 films.The cerium dioxide target was used as the sputtering source to deposit the CeO2 buffer layer by the RF magnetron sputtering method.The epitaxial growth of CeO2 films on r-cut sapphire substrates was obtained over a wide range of sputtering parameters, such as temperature, pressure, power and Ar/O2ratio.