Method of producing wurtzite-like boron nitride

Details Method of producing wurtzite-like boron nitride Method of producing wurtzite-like boron nitride

1975-07-03

1977-03-29

Peters, G. O.

Chemistry of inorganic compounds

Boron or compound thereof

Binary compound

C01B 2106, C01B 3514

Patent

active

040149790

ABSTRACT:
A powder of boron nitride having a graphite structure is mixed with cooling additives having a shock impedance different from that of the boron nitride having a wurtzite structure being formed. The resulting mixture is placed into a protective device, said device being then placed in an explosive charge ensuring the generation of a shock wave having an intensity of not less than 100 kbar.
The wurtzite-like boron nitride thus produced has a pycnometric density of 3.10 to 3.38 g/cm.sup.3, a specific surface area of not less than 10 m.sup.2 g, a temperature of transition into graphite-like boron nitride of about 700.degree. C and a refractive index less than 2.10 for red light.

REFERENCES:
patent: 3212851 (1965-10-01), Bundy et al.
patent: 3367766 (1968-02-01), Barrington et al.
patent: 3401019 (1968-09-01), Cowan et al.
patent: 3667911 (1972-06-01), Balchan et al.
Dulin et al., "Soviet Physics", vol. 2, No. 5, Nov. 1969, pp. 1016-1020 (Trans.).

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