Development of a high pressure stirring cell up to 2 GPa: a new window for chemical reactions and material synthesis |
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Authors: | Ying-Jui Hsu Alisa Gordeeva Mathis Antlauf Ulrich Häussermann |
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Institution: | 1. Department of Physics, Ume? University Ume?, Sweden;2. Department of Materials and Environmental Chemistry, Stockholm University Stockholm, Sweden |
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Abstract: | ABSTRACT A new method for stirring under high pressure conditions has been developed and tested. The key component is a Teflon cell assembly equipped with magnetic stirring function, which is capable to operate across a wide pressure range, up to at least 2?GPa, in a large volume press. The setup enables adjustable stirrer rotation rate and detection of stirring in a sample, e.g. to observe liquid–solid phase transitions at high pressure. The viscosity limit of stirring is ca. 500 times that of water at room temperature (i.e. ~500?mPas). Moreover, we show that zinc oxide nanoparticles hydrothermally synthesized at 0.5?GPa and 100°C under stirring conditions show an order of magnitude smaller size (100?nm) compared to those synthesized under non-stirring conditions (1?μm). The wide pressure range for stirring of viscous media opens interesting possibilities to produce novel materials via hydrothermal synthesis and chemical reactions. |
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Keywords: | Magnetic stirring hydrothermal synthesis high pressure metal oxide |
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