Mullite products were prepared by using mullite,clay,and α-alumina micropowder as the main raw materials and adding 0,1%and 2%mullite whisker respectively under the sintering for 3 hours at 1 600℃,followed by a study on the effect of mullite whisker addition on the phase composition,microstructure and properties of mullite products.The results showed that as the addition of mullite whisker increases,odds are higher that the fine secondary mullite transitions across the grain boundary into mullite whiskers,allowing the mullite whisker to grow rapidly into long columns and stagger and interlock with each other,improving the sample's density and strength,and reducing its thermal expansion and high-temperature creep properties.Therefore,2%was defined as the best addition of mullite whiskers to achieve the top performance of mullite products.
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