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The electrical and other physical properties of haloborate glasses and glass-ceramics
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Kemp, A. P. (Andrew Patrick) (1988) The electrical and other physical properties of haloborate glasses and glass-ceramics. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b3229726~S15
Abstract
The effect of a series of classical nucleating agents upon the nucleation and mechanical properties of anhydrous borax (AB,Na2B407) glasses and glass-ceramics have been investigated. These results have been compared to those obtained for NaCl-doped compounds and a commercial B”-Al2O3 ceramic to examine the applicability of haloborate glass-ceramics as a solid electrolyte in high temperature sodium-sulphur cell.
The nucleation of these materials was found to be predominantly surface oriented. A new technique has been introduced to increase the number of surface nucleation sites.
Direct and indirect structural comparisons of these materials have been carried out using X-ray diffraction and infra-red and Raman spectroscopy. Results from the NaCI-doped materials have tentatively indicated that the chlorine atom plays a direct structural role. Subtle modifications to the structure are thought to results in previously determined high ionic conductivities.
A variety of techniques have been examined for the measurement of ionic conductivities based on time and frequency domain spectroscopy. A frequency domain measurement system has been designed and built and a computer program written to analyse the acquired data. Equipment exploring a complementary technique based on the multiple disc stacking arrangement postulated by Tubandt has been built. Results from these two techniques appear promising.
| Item Type: | Thesis (PhD) | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Library of Congress Subject Headings (LCSH): | Glass-ceramics -- Electric properties, Glass-ceramics -- Mechanical properties | ||||
| Official Date: | January 1988 | ||||
| Dates: |
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| Institution: | University of Warwick | ||||
| Theses Department: | Department of Physics | ||||
| Thesis Type: | PhD | ||||
| Publication Status: | Unpublished | ||||
| Supervisor(s)/Advisor: | McMillan, P. W. (Peter Warwick) ; Holland, Diane | ||||
| Sponsors: | Science and Engineering Research Council (Great Britain) | ||||
| Format of File: | |||||
| Extent: | vii, 121, [29] leaves : illustrations | ||||
| Language: | eng |
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