Method for making amorphous particles using a uniform melt-state in a microwave generated plasma torch
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United States of America Patent
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Feb 10, 2015
Grant Date -
Jun 5, 2014
app pub date -
Dec 4, 2012
filing date -
Dec 4, 2012
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Abstract
Feed material comprising uniform solution precursor droplets is processed in a uniform melt state using microwave generated plasma. The plasma torch employed is capable of generating laminar gas flows and providing a uniform temperature profile within the plasma. Plasma exhaust products are quenched at high rates to yield amorphous products. Products of this process include spherical, highly porous and amorphous oxide ceramic particles such as magnesia-yttria (MgO—Y2O3). The present invention can also be used to produce amorphous non oxide ceramic particles comprised of Boron, Carbon, and Nitrogen which can be subsequently consolidated into super hard materials.
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