Günne, Jörn Schmedt auf der
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Günne, Jörn Schmedt auf der
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Publication Access status: Metadata only , Cement hydration kinetics followed by electron spin resonanceCement hydration is driven by a complex system of chemical reactions of several hydraulic binders and water that influence each other. Here we establish a method to measure the hydration kinetics of an individual clinker phase by electron spin resonance spectroscopy. The hydration of a Mn(II) doped crystalline phase can be analyzed from the decay of signals coming from the starting material and the formed product. Transformation times can be determined by modeling the time series of the signal intensities. The host of the dopant could be identified by combining evidence from different analytical techniques including diffraction and electron microscopy. The results about the reaction kinetics are compared to those obtained from caloric measurements. The method opens a way to study the hydration of different hydraulic binders in complex systems selectively, which includes the determination of induction periods and transformation times from in-situ measurements.Source Type:Article1 - Some of the metrics are blocked by yourconsent settings
Publication Access status: Metadata only , Combining NMR and impedance spectroscopy <i>in situ</i> to study the dynamics of solid ion conductorsUnwanted differences in the apparent ion mobilities as seen by NMR and impedance spectroscopy are removed by a setup that allows measuring both on the same, by which in situ studies of interface stability and phase transitions become possible.Source Type:Article2 - Some of the metrics are blocked by yourconsent settings
Publication Access status: Metadata only , Structure and phase changes of alumina produced by flame hydrolysisFumed alumina from the combustion of AlCl 3 produced nano pArticles with specific areas from 30 to 220 m 2 g −1 (BET) which were characterized by powder X-ray diffraction, 27 Al solid-state NMR and transmission electron microscopy.Source Type:Article4
