Crystalline domain size and faulting in the new NIST SRM 1979 zinc oxide

Published

September 6, 2013

Author(s)

James P. Cline, David R. Black, Albert Henins, John E. Bonevich, Whitfield S. Pam, Paolo Scardi, Matteo Leoni

Abstract

A NIST SRM certified to address the issue of crystallite size measurement through a line profile analysis has been under development for several years. In order to prepare the feedstock for the SRM, nano-crystalline zinc oxide was produced from thermal decomposition of zinc oxalate. The thermal processing parameters were chosen to yield particles in two size ranges, one with a distribution centered at approximately 15 nm and another centered at 60 nm. Certification data were collected on a NIST built diffractometer equipped with a Johansson incident beam monochromator and scintillation detector. Data were analyzed using whole powder pattern modeling to determine microstructural data. The analysis shows domains to be in the form of discs of a fairly small aspect ratio, containing stacking faults in the 15 nm powder. The effects of the faults in the 60 nm, however, are difficult to discern. Images of the crystallites obtained with transmission electron microscopy are consistent with the results from the X-ray diffraction analyses.

Citation

Powder Diffraction

Volume

28

Pub Type

Journals

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DOI Link

Keywords

powder diffraction, crystallite size, line profile analysis, standard reference material, zinc oxide

Citation

Cline, J. , Black, D. , Henins, A. , Bonevich, J. , Pam, W. , Scardi, P. and Leoni, M. (2013), Crystalline domain size and faulting in the new NIST SRM 1979 zinc oxide, Powder Diffraction, [online], https://doi.org/10.1017/S0885715613001188 (Accessed November 21, 2024)