What are the main factors affecting the color of white corundum abrasives tool?
①The change of the color of the white corundum abrasive is mainly determined by the amount of impurities in the binder and the firing atmosphere. If it is fired in an oxidizing atmosphere, when the content of (TiO2+Fe2O3) in the binder is less than 0.55%, the white corundum will not show red, red and yellow colors. As the content of Fe2O3 and TiO2 in the binder increases, the white corundum abrasive tool becomes reddish and reddish-yellow gradually intensifies. Therefore, if the content of (TiO2+Fe2O3) in the binder is greater than 0.55%, the white corundum abrasive tool should not be used for firing. In an oxidizing atmosphere, it is best to use a neutral atmosphere or a weak oxidizing atmosphere for firing.
②Adding talcum powder, quartz powder and magnesium oxide powder to the binder of white corundum abrasive tool can eliminate the red color of white corundum, but it will affect the strength of the abrasive tool.