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2021 | OriginalPaper | Chapter

8. Direct Determination of Viscosity of Supercritical Solutions

Authors : Thomas G. Steigerwald, Eberhard Schlücker

Published in: Ammonothermal Synthesis and Crystal Growth of Nitrides

Publisher: Springer International Publishing

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Abstract

The chapter delves into the critical role of viscosity in ammonothermal processes, emphasizing the need for accurate viscosity measurements to optimize crystallization processes. It discusses the development of various viscometers, such as ultrasonic and rolling ball viscometers, tailored to withstand high temperatures and pressures. The chapter also explores the influence of temperature, pressure, and dissolved substances on the viscosity of ammonia, highlighting the complexities and the innovative solutions required to measure and control this parameter effectively. The development of a rolling ball viscometer specifically designed for ammonothermal conditions is a notable highlight, showcasing the advancements in the field.

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Metadata
Title
Direct Determination of Viscosity of Supercritical Solutions
Authors
Thomas G. Steigerwald
Eberhard Schlücker
Copyright Year
2021
DOI
https://doi.org/10.1007/978-3-030-56305-9_8