Vollet, Dimas R. [UNESP]Macedo, JoséCarlos D.Mascarenhas, Yvonne P.2014-05-272014-05-271994-02-01Applied Clay Science, v. 8, n. 6, p. 397-404, 1994.0169-1317http://hdl.handle.net/11449/64464Pore 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. © 1994.397-404engdealuminationkaolinpore structuresmall angle X-ray scatteringAcidsCharacterizationClay productsPorositySurface propertiesX ray analysisAcid dealuminationAcid treatmentGlobular pore volumeMetakaolinSmall angle X ray scattering (SAXS)KaolinArtigo10.1016/0169-1317(94)90035-3Acesso restrito2-s2.0-0028184118