Comminuting and rapidly solidifying particles of metalloids...

Details Comminuting and rapidly solidifying particles of metalloids... Comminuting and rapidly solidifying particles of metalloids...

B - Operations, Transporting

22

F

18/500.2

B22F 9/08 (2006.01) C01B 21/068 (2006.01) C01B 33/02 (2006.01) C04B 35/584 (2006.01)

Patent

CA 1280858

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 solidified 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 equal to or greater than 105°C/second.

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