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- W2381678990 abstract "The structures of aluminum-oxide polyhedron in fly ash and their changes after a grinding process were studied by ~(27)Al MAS and 2D 3QMAS NMR. The results showed that tetrahedron and octahedron are the main forms of aluminum-oxide polyhedron in raw fly ash, and they exist in a multi-structural surrounding. Only slight changes were observed for the tetrahedron structures after grinding, indicating that they are stable, probably because they exist in a three dimensional structural net of [SiO_4]~(4-). The results also showed that, after grinding, part of the octahedron structures broken away from the net, and transformed and distributed in a symmetrical structural surrounding. The results from the 2D 3QMAS experiments showed that a small amount of hexahedron structures originally existed in the raw fly ash was damaged after grinding." @default.
- W2381678990 created "2016-06-24" @default.
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- W2381678990 date "2004-01-01" @default.
- W2381678990 modified "2023-09-23" @default.
- W2381678990 title "STRUCTURES OF ALUMINUM-OXIDE POLYHEDRON IN FLY ASH BEFORE AND AFTER GRINDING STUDIED BY SOLID STATE NMR" @default.
- W2381678990 hasPublicationYear "2004" @default.
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