Effect of Mg-Al Spinel on the Glaze Properties of Fully Polished Glazed Ceramic
In order to enhance the wear resistance of fully polished glazed ceramic products,this study introduces the wear resistant strengthening component,magnesium aluminum spinel,into the fully polished glazed ceramic.The influences of magnesium aluminate spinel addition on the glossiness,hardness,wear resistance,phase composition,and microstructure of the polished glazed ceramics were studied.The findings show that under the manufacturing conditions of the fully polished glazed ceramic products(low temperature fast firing,roller kiln firing temperature of 1220 ℃,firing period of 40 min),increasing the addition content of magnesia-alumina spinel gradually enhances the hardness and abrasion resistance of the fully glazed layer,while the magnesium aluminate spinel content of the glaze is also promoted.However,the firing temperature of the fully polished glaze increased with the introduction of magnesium aluminate spinel,leading to an increase in the pore number and size,which is detrimental to the enhancement of the glossiness,chromogenic and antifouling properties of the fully polished glaze.Furthermore,fully polished glazed products with excellent comprehensive performance can be fabricated by controlling the appropriate content of magnesium aluminate spinel.Specifically,when the addition of magnesia-alumina spinel is 12 wt％,the glazed layer exhibits optimal comprehensive performance,with a Vickers hardness of 7.42 GPa,Mohs hardness of 5,wear resistance of Grade 4(at 6000 rpm).Meanwhile,the polished product demonstrates high glossiness of 94 °,excellent chromogenicity(the color difference values of blue,yellow and black were all lower than 3.2),and antifouling properties(Grade 5)completely meeting the application needs of fully polished glazed ceramic products.
Fully polished glazed with high wear resistanceMagnesium aluminate spinelHigh hardness
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