Boissonade, Jonathan James (2015). Direct contact measurement of the dielectric properties of glass ionomer cements for MEMs design. University of Birmingham. Ph.D.
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Boissonade15PhD.pdf
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Abstract
This investigation was aimed at measuring the changes in dielectric properties of glass ionomer cements during their setting reaction in order to observe if there is a correlation between these properties and the cement curing. Commercial glass ionomer cements were prepared and their setting process was monitored over a 24 hour period using FT-IR and direct contact impedance measurement. An impedance bridge with a dielectric test assembly, based on previous work by Braden et al, was used to measure the dielectric properties of a number of different glass ionomer cements using a simple design. Using the dielectric properties of the glass ionomer cements, it could be possible to develop a micro-electro-mechanical sensor (MEMS) based on this design, which could be implanted into a dental restoration and interrogated remotely. During the curing of the cements examined, the dielectric data collected from the co-planar assembly showed a change in impedance over the course of the setting of the cement, which when compared to FT-IR spectra over the same period, showed a correlation between the dielectric properties and the chemical changes within the cement.
Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
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Award Type: | Doctorates > Ph.D. | |||||||||
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College/Faculty: | Colleges (2008 onwards) > College of Engineering & Physical Sciences | |||||||||
School or Department: | School of Metallurgy and Materials | |||||||||
Funders: | Engineering and Physical Sciences Research Council | |||||||||
Subjects: | Q Science > QD Chemistry R Medicine > RK Dentistry |
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URI: | http://etheses.bham.ac.uk/id/eprint/6321 |
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