An insight into the surface properties of calcined kaolinitic clays: The grinding effect

- Surface Lewis basic properties increase from kaoline to metakaolinitic materials.
- The extensive grinding of metakaolinitic materials affords a decrease of the γsd.
- Lewis basic properties of the metakaolines surface also increase with grinding.
- Grinding results are largely explained by changes in the surface nanoroughness.
- Shown results may have interest in the composites area/cation-exchange properties.