Large boron nitride abrasive particles

Details Large boron nitride abrasive particles Large boron nitride abrasive particles

1978-09-15

1980-05-06

Peters, G. O.

Chemistry of inorganic compounds

Boron or compound thereof

Binary compound

51307, 51309, 264 84, C01B 3508

Patent

active

042017572

ABSTRACT:
Hard boron nitride particles of wurtzite and zincblende crystal structure of larger than 50 microns particle size are formed by subjecting recrystallized pyrolytic boron nitride to dynamic shock treatment to create pressures and temperatures in which the stable form of boron nitride has a wurtzite or zincblende crystal structure.

REFERENCES:
patent: 2947617 (1960-08-01), Wentorf
patent: 3578403 (1971-05-01), Moore
patent: 3851027 (1974-11-01), Balchan et al.
patent: 3918219 (1975-11-01), Wentorf et al.
DeCarli, P. S., "Bull. Am. Phys. Soc." II, 12, 1967, 1127.
Dulin, I. N. et al., "Solid State Physics" II, 1969, 1252.
Johnson et al., "Physical Review Letters", vol. 29, No. 20, Nov. 1972, pp. 1369-1371.
"Physics Today", Feb. 1973, pp. 17-18.

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