Fast X-ray diffraction crystal size distribution analysis

Neher, Sigmund Heinrich

dc.contributor.advisor	Kuhs, Werner F. Prof. Dr.
dc.contributor.author	Neher, Sigmund Heinrich
dc.date.accessioned	2018-09-11T10:16:12Z
dc.date.available	2018-09-11T10:16:12Z
dc.date.issued	2018-09-11
dc.identifier.uri	http://hdl.handle.net/11858/00-1735-0000-002E-E4A2-6
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-7050
dc.language.iso	deu	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc	910	de
dc.subject.ddc	550	de
dc.title	Fast X-ray diffraction crystal size distribution analysis	de
dc.type	cumulativeThesis	de
dc.contributor.referee	Kuhs, Werner F. Prof. Dr.
dc.date.examination	2018-07-03
dc.description.abstracteng	Fast X-ray Diffraction Crystal Size Distribution analysis (FXD-CSD) constitutes a novel method to determine volume-based crystal size distributions (CSD) of crystalline powders or polycrystalline materials in the lower µm range. The method uses the diffracted integrated intensity of thousands individual crystals to determine the crystal volumes of the sample via a reference-based scaling procedure. The scaling is possible through a reference sample X-ray measurement with known CSD. For the sample and the reference sample measurement, a two-dimensional detector and a goniometer with at least one rotation axis is mandatory. The integrated intensities are obtained via step-wise rotation measurements. This way several hundred frames are collected for each sample. The collected data is analyzed by a specially developed software package, written in Python. The thesis comprises three peer-reviewed research papers, all having FXD-CSD as applied core method. The first manuscript (Chapter 2) describes the method and its functionality as well as its application range and limitations. Chapter 3 is demonstrating the application of the method, having technical ceramics as samples under investigations. In Chapter 4, FXD-CSD is used to answer fundament research questions, concerning crystal coarsening in gas hydrates. Chapter 1 provides an introduction to all necessary topics needed to understand the procedure of FXD-CSD and gives an overview over the previous work carried out in our group. The thesis closes with a general conclusion and an outlook regarding future applications and further improvements	de
dc.contributor.coReferee	Klein, Helmut PD Dr.
dc.contributor.thirdReferee	Webb, Sharon Prof. Dr.
dc.contributor.thirdReferee	Sowa, Heidrun PD. Dr.
dc.contributor.thirdReferee	Schmidt, Burkhard Dr.
dc.contributor.thirdReferee	Karius, Volker Dr.
dc.subject.eng	crystal size distribution	de
dc.subject.eng	FXDCSD	de
dc.subject.eng	method	de
dc.subject.eng	polycrystaline materials	de
dc.subject.eng	CSD	de
dc.identifier.urn	urn:nbn:de:gbv:7-11858/00-1735-0000-002E-E4A2-6-2
dc.affiliation.institute	Fakultät für Geowissenschaften und Geographie	de
dc.subject.gokfull	Geologische Wissenschaften (PPN62504584X)	de
dc.identifier.ppn	1030642206

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