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PREPARATION OF ZrO_2 (Y_2O_3) POWDER AND SiC NANOPOWDER BY CARBOTHERMAL REDUCTION OF ZrSiO_4

YU Runzhou TANG Shaoqiu and DU Haiqing (Department of Material Science and Engineering,Central South (College of Chemistry and Chemical Engineering,Hunan University,Changsha 410083,Hunan,China) University,Changsh   

  • Online:2001-01-25 Published:2001-01-25

碳热还原ZrSiO_4制备ZrO_2(Y_2O_3)粉末和SiC纳米粉末

余润洲,唐绍裘,杜海清   

  1. 中南大学材料科学与工程系!湖南长沙410083,湖南大学化学化工学院!湖南长沙410082,湖南大学化学化工学院!湖南长沙410082

Abstract: ZrO 2(Y 2O 3) powder and SiC nanopowder were prepared by carbothermal reduction of ZrSiO 4. With the existence of additive Y 2O 3 and other impurities, ZrSiO 4 was dissociated into ZrO 2 and SiO 2 in the condition of 1450—1550?℃. ZrO 2(Y 2O 3)powder was thus obtained via the removal of SiO 2 as silicon oxide (SiO) gas during carbothermal reduction process. SiC nanopowder and small amount of SiC whisker were synthesized form the gas-phase reaction between SiO vapor and supplied CH 4 gas.

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