Фазовая диаграмма системы B-N

К оглавлению: Другие диаграммы (Others phase diargams)

B-N (Boron-Nitrogen) Editor No equilibrium diagram is available for the B-N system; however, [63Bun] reported a speculative P-T diagram for BN. The compound BN exists in various modifications at ambient as well as high pressures. Extrapolation of the pressure-temperature investigation of [63Bun] suggests that at ambient pressure the cubic zinc blende-type BN is stable below ~225 C, whereas hexagonal BN is stable above ~225 C and melts at ~3000 C. The hexagonal wurtzite-type BN is stable only at high pressures (>110 kbar). Other compounds reported in the B-N system are B25N [75Wil], B3N [18Kro], and BN6 [54Wib].-P.R. S. 18Kro: W. Kroll, Z. Anorg. Allg. Chem., 102, 17 (1918) in German. 26Has: O. Hassel, Norsk Geol. Tidsskr., 9, 226-270 (1926). 52Pea: R.S. Pease, Acta Crystallogr., 5, 356-361 (1952). 54Wib: E. Wiberg and H. Michaud, Z. Naturforsch., 9B, 497-499 (1954). 57Wen: R.H. Wentorf, Jr., J. Chem. Phys., 26, 956 (1957). 61Sam: G.V. Samsonov, Poroshk. Met., Akad. Nauk Ukr. SSR, 1(3), 53-62 (1961). 63Bun: F.P. Bundy and R. H. Wentorf, Jr., J. Chem. Phys., 38(5), 1144-1149 ( 1963). 72Wak: M. Wakatsuki, K. Ichinose, and T. Aoki, Mater. Res. Bull., 7, 999-1004 ( 1972). 75Wil: G. Will and K.H. Kossobutski, Z. Kristallogr., 142, 384-397 (1975). 76Kur: A.V. Kurdyumov, N.F. Ostrovskaya, A.N. Pilyawkevich, G.A. Dubitskii, and V.N. Slesarev, Dokl. Akad. Nauk SSSR, 229, 338-340 (1976) in Russian; TR: Sov. Phys. Dokl., 21(7), 402-403 (1976). 1