Abstract
The primary crystallite size of titania powder relates to its properties in a number of applications. Transmission electron microscopy was used in this interlaboratory comparison (ILC) to measure primary crystallite size and shape distributions for a commercial aggregated titania powder. Data of four size descriptors and two shape descriptors were evaluated across nine laboratories. Data repeatability and reproducibility was evaluated by analysis of variance. One-third of the laboratory pairs had similar size descriptor data, but 83% of the pairs had similar aspect ratio data. Scale descriptor distributions were generally unimodal and were well-described by lognormal reference models. Shape descriptor distributions were multi-modal but data visualization plots demonstrated that the Weibull distribution was preferred to the normal distribution. For the equivalent circular diameter size descriptor, measurement uncertainties of the lognormal distribution scale and width parameters were 9.5% and 22%, respectively. For the aspect ratio shape descriptor, the measurement uncertainties of the Weibull distribution scale and width parameters were 7.0% and 26%, respectively. Both measurement uncertainty estimates and data visualizations should be used to analyze size and shape distributions of particles on the nanoscale.
Document Type
Article
Publication Date
7-2017
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.apt.2017.03.027
Related Content
Refer to Web version on PubMed Central for supplementary material.
Repository Citation
Grulke, Eric A.; Yamamoto, Kazuhiro; Kumagai, Kazuhiro; Häusler, Ines; Österle, Werner; Ortel, Erik; Hodoroaba, Vasile-Dan; Brown, Scott C.; Chan, Christopher; Zheng, Jiwen; Yamamoto, Kenji; Yashiki, Kouji; Song, Nam Woong; Kim, Young Heon; Stefaniak, Aleksandr B; Schwegler-Berry, D.; Coleman, Victoria A.; Jämting, Åsa K.; Herrmann, Jan; Arakawa, Toru; Burchett, Woodrow W.; Lambert, Joshua W.; and Stromberg, Arnold J., "Size and Shape Distributions of Primary Crystallites in Titania Aggregates" (2017). Chemical and Materials Engineering Faculty Publications. 58.
https://uknowledge.uky.edu/cme_facpub/58
Supplementary Material
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Notes/Citation Information
Published in Advanced Powder Technology, v. 28, issue 7, p. 1647-1659.
© 2017 Published by Elsevier B.V. on behalf of The Society of Powder Technology Japan. All rights reserved.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
The document available for download is the author's post-peer-review final draft of the article.