| 摘要 |
Disclosed herein is a kaolin composition having nanosize dimensions. At least about 75% of the kaolin particles by weight have an equivalent spherical diameter (esd) of less than about 0.25 μm. The kaolin can also have a particle size distribution wherein at least about 99% of the particles by weight have an esd of less than about 2 μm, and/or wherein at least about 98% of the particles by weight have an esd of less than about 1 μm, and/or wherein at least about 97% of the particles by weight have an esd of less than about 0.5 μm. The kaolin can have a mean diameter ranging from about 0.075 μm to about 0.2 μm, and a shape factor of about 30 or less.
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