ZrMgMo_3O_(12) powders with negative thermal expansion were synthesized by solid-state reaction method. Spark plasma sintering( SPS) technique was used to prepare ZrMgMo_3O_(12) ceramic. The influences of structure,surface morphology and sintering temperature of ZrMgMo_3O_(12) on the properties of thermal expansion and thermal conductivity were discussed. The results showed: the sample sintered at the temperature of 150 ℃ had the highest relative density more than 97%. From room temperature to 600 ℃,the the...