Purifying refractory metal borides

Details Purifying refractory metal borides Purifying refractory metal borides

1988-01-26

1989-03-14

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

423297, C01B 3504, C04B 3502

Patent

active

048124257

ABSTRACT:
The invention relates to the production of desirably purified refractory metal borides. The method can be used to purify even commercially available material. Careful attention is directed to the oxygen impurity level of the refractory metal boride and such will usually be maximized at a very low level. Critical attention is directed to the oxygen to carbon molar ratio. Heating of impure materials, typically presented in consolidated form and having constituent adjustments in accordance with invention principles, can lead to the preparation of products of highly desirable density, on the one hand, and prepare products of extremely low contamination levels, on the other hand.

REFERENCES:
patent: 2973247 (1961-02-01), Espenschied
patent: 3013862 (1961-12-01), May
patent: 3316062 (1967-04-01), Criscione
patent: 3379647 (1968-04-01), Smudski
patent: 4452767 (1984-06-01), Brynestad et al.
patent: 4595545 (1986-06-01), Sane

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