Abstract
ABSTRACT A new method of modifying ceramics using plasmas was recently revealed in our laboratory. To wit: The size, shape, and phase of alumina particles were dramatically modified by passage through an atmospheric pressure argon plasma. Specifically, irregularly shaped particle of γ-alumina with an average diameter of 15 μm were converted to smaller (6 μm) spherical particles primarily consisting of δ- and corundum phases. The plasma torch was operated with an argon flow rate of 3 slpm, power of 700 watts, and the average particle residence time was 0.1 seconds.
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