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

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 componen...

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Veröffentlicht in:Microscopy and microanalysis Jg. 20; H. 1; S. 42 - 49
Hauptverfasser: Lu, Jiangbo, Roeffaers, Maarten B.J., Bartholomeeusen, Evelyne, Sels, Bert F., Schryvers, Dominique
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, USA Cambridge University Press 01.02.2014
Oxford University Press
Schlagworte:
Catalytic cracking
Crystals
Ion beams
Materials Applications
Scanning electron microscopy
Transmission electron microscopy
Zeolites
rotational boundary
zeolite
focused ion beam
ZSM-5
displacement boundary
intergrowth
transmission electron microscopy
ISSN:1431-9276, 1435-8115, 1435-8115
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Zusammenfassung: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.
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ISSN:1431-9276
1435-8115
1435-8115
DOI:10.1017/S1431927613013731