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Intergrowth of Components and Ramps in Coffin-Shaped ZSM-5 Zeolite Crystals Unraveled by Focused Ion Beam-Assisted Transmission Electron Microscopy

Published online by Cambridge University Press:  05 November 2013

Jiangbo Lu ,
Maarten B.J. Roeffaers ,
Evelyne Bartholomeeusen ,
Bert F. Sels  and
Dominique Schryvers
Jiangbo Lu
Affiliation:
EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
Maarten B.J. Roeffaers
Affiliation:
COK, KU Leuven, Kasteelpark Arenberg 23, B-3001 Heverlee, Belgium
Evelyne Bartholomeeusen
Affiliation:
COK, KU Leuven, Kasteelpark Arenberg 23, B-3001 Heverlee, Belgium
Bert F. Sels
Affiliation:
COK, KU Leuven, Kasteelpark Arenberg 23, B-3001 Heverlee, Belgium
Dominique Schryvers*
Affiliation:
EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
*
*Corresponding author. E-mail: nick.schryvers@uantwerpen.be
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Abstract

Scanning electron microscopy, focused ion beam (FIB), and transmission electron microscopy are combined to study the intergrowth of 90° rotational components and of ramps in coffin-shaped ZSM-5 crystals. The 90° rotational boundaries with local zig-zag features between different intergrowth components are observed in the main part of crystal. Also a new kind of displacement boundary is described. At the displacement boundary there is a shift of the unit cells along the boundary without a change in orientation. Based on lamellae prepared with FIB from different positions of the ramps and crystal, the orientation relationships between ramps and the main part of the crystal are studied and the three-dimensional morphology and growth mechanism of the ramp are illustrated.

Keywords

intergrowthrotational boundarydisplacement boundaryzeoliteZSM-5focused ion beamtransmission electron microscopy
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 20 , Issue 1 , February 2014 , pp. 42 - 49
Copyright
Copyright © Microscopy Society of America 2014 

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