The morphology of isomorphous substituted hectorites |
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| Authors: | W. Gille B. Koschel W. Schwieger |
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| Affiliation: | (1) Department of Physics, Martin-Luther-University Halle-Wittenberg, SAS-Laboratory, Hoher Weg 8, 06120 Halle, Germany,;(2) Lehrstuhl of Technical Chemistry I, Friedrich Alexander University Erlangen-Nuremberg, Egerlandstrasse 3, 91054 Erlangen, Germany, |
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| Abstract: | Small-angle scattering (SAS) is used to investigate geometric structure parameters of isomorphically substituted hectorites. The aluminum content, the layer charge, and the purity of the substituted hectorites are related to the Al supply. The structural information contained in the scattering curves I(h) about the morphology of the samples in four different range orders from 1 nm to 300 nm is analyzed using the theory of the chord length distribution. The geometric structure parameters obtained are compared with results from XRD (L 0-parameter), N2-adsorption (L 1 and mesopore size) and photon-correlation spectroscopy (largest dimension L 3 and characteristic dimension of the secondary particles). Accepted after revision: 13 November 2001 Electronic Publication |
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| Keywords: | Hectorite Aggregation Primary particles Secondary particles Range order Stereology Chord length distribution Particle sizing |
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