氧化锆陶瓷磨球的滚制成型法制备技术与性能研究

Study on the Technique and Properties of Zirconia Wear-resistant Ceramic Balls Manufactured by a Roll-forming Method

研究了滚制成型法制备氧化锆陶瓷球坯工艺及烧结温度对陶瓷磨球体积密度、压碎强度和自磨损性能的影响。结果表明:凝胶固相合成法生产的亚微米级3 mol%Y2O3-ZrO2陶瓷粉体适用于滚制成型法制备体积密度高、圆度好、大小均匀的球坯。在1500℃保温2 h的烧结条件下得到的微晶氧化锆陶瓷磨球在快速研磨机中的自磨损率最低,其微观结构均匀,晶粒尺寸约0.5μm,体积密度为5.97 g/cm3,Φ2.75 mm和Φ6.36 mm陶瓷磨球的平均压碎强度分别达到326 kg和1377 kg。

The zirconia wear-resistant ceramic balls have been manufactured by roll-forming method.The effects of the sintering temperature on the volume density,crushing intensity and self-wear capacity of the ceramic balls have been investigated.The result shows that the 3 mol%Y2O3-ZrO2 sub-micron ceramic powder synthesized by gel solid state method is applicable to the roll-forming ball method with high volume density,good roundness and homogenizing dimension.Fine crystal zirconia ceramic wear-resistant balls sintered at 1500 ℃ for 2 h indicate lower self-wear rate in fast-speed miller.Homogeneous microstructure with crystal size about 0.5 μm and volume density of 5.97 g/cm3 was obtained.The average crushing strength of the ceramic balls measured at Φ2.75 mm and Φ6.36 mm amount to 326 kg and 1377 kg respectively.