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- Pore structure characterization of kaolin, metakaolin, and their acid-treated products using small-angle X-ray scattering
- Universidade Estadual Paulista (UNESP)
- São Paulo. Cx. P. 369
- Pore structure of dealuminated kaolin and metakaolin was studied by small-angle X-ray scattering (SAXS). Both parent kaolin and metakaolin have about 10% of the total pore volume provided by globular pores with 105 Å mean pore size. Their surface area is about 14 m2/g. Acid dealumination of kaolin causes an increase of its globular pore volume without an appreciable change in the mean pore size, its surface area increasing up to about 90 m2/g. Acid dealumination of metakaolin enhances the globular pore volume, although there is generation of slit-shaped pores with a narrow thickness distribution whose mean value is 14 Å. This interlayer spacing causes an increase in surface area of about 190 m2/g by SAXS. © 1994.
- Applied Clay Science, v. 8, n. 6, p. 397-404, 1994.
- pore structure
- small angle X-ray scattering
- Clay products
- Surface properties
- X ray analysis
- Acid dealumination
- Acid treatment
- Globular pore volume
- Small angle X ray scattering (SAXS)
- Acesso restrito
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