Series of ZrO_2 nanomaterials and their combined materials with carbon membrane were obtained by Sol-Gel method followed by post- calcination. The test results of XRD, Raman and SEM show that the nanomaterials has as small size as 6.85 nm with cube phase, well- organized secondary distribution particles, and the combined materials exhibit good conductivity with carbon existing in membrane form. After carbon membrane was oxidated at 823 K, the cubic ZrO_2 was transformed into insulated tetragonal ZrO_2 with crystal size increasing.

Key words: ZIRCONIUM OXIDE, COMPOSITE MATERIALS, NANOPHASE MATERIALS, SOL-GEL PROCESS, XRD, SEM, ELECTRICAL CONDUCTIVITY