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Changes in the medium-range order of zeolite A by mechanical and thermal amorphization

Wakihara, T; Sato, K; Kohara, S; Sankar, G; Tatami, J; Komeya, K; ... MacKenzie, KJD; + view all (2010) Changes in the medium-range order of zeolite A by mechanical and thermal amorphization. MICROPOR MESOPOR MAT , 136 (1-3) 92 - 96. 10.1016/j.micromeso.2010.08.002.

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Abstract

Crystalline zeolite A was amorphized by mechanical and thermal treatments, and the resulting changes in the atomic arrangement are characterized by HEXRD, Al-27 MAS NMR and Raman spectroscopy. HEXRD measurements revealed that the 6R and 8R rings are distorted and/or destroyed, while the 4R ring is preserved during mechanical treatment, but all rings are distorted and/or destroyed by thermal treatment. Data from Al-27 MAS NMR and Raman spectroscopy also support these results. Furthermore, recrystallization behavior is found to be different between mechanically and thermally amorphized solids. (C) 2010 Elsevier Inc. All rights reserved.

Type:Article
Title:Changes in the medium-range order of zeolite A by mechanical and thermal amorphization
DOI:10.1016/j.micromeso.2010.08.002
Keywords:Ring, Amorphization, Medium-range order, Zeolite A, X-RAY-DIFFRACTION, HYDROTHERMAL SYNTHESIS, RAMAN-SPECTROSCOPY, ALUMINOSILICATE ZEOLITES, NEUTRON-DIFFRACTION, HIGH-PRESSURE, SILICA, ELUCIDATION, PRECURSORS, GLASS
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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