Metalloid precursor powder and method of making same

Details Metalloid precursor powder and method of making same Metalloid precursor powder and method of making same

1984-10-15

1987-08-18

Yoncoskie, Robert

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

264 15, 264 28, 420556, 420578, 425 8, B22D 2308

Patent

active

046876065

ABSTRACT:
A method of making a metalloid precursor powder is disclosed, which powder avoids impurity localization and is effective to produce an improved fine grained ceramic body. A metalloid melt is formed and rapidly solidified into particles having a particle size distribution of 2-50 microns; the particles are cooled at a rate to distribute impurities or additive metal ingredients substantially uniformly throughout the solidifed particles with spacing between localizations being substantially in the range of 1-25 microns and the size of each localization being one micron or less. The cooling rate is preferably equal to or greater than 10.sup.5 .degree. C./second.

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