| 单词 | boron nitride |
| 释义 | > as lemmasboron nitride boron nitride n. Chemistry the nitride of boron, BN, a solid compound made synthetically and noted for its hardness and stability; cf. aethogen n., borazon n.Boron nitride occurs in several different crystalline forms and as an amorphous powder. Its uses include abrasives, lubricants, cosmetics, and semiconductor devices. The various forms of boron nitride are analogous to the structures of carbon, with which it is isoelectronic. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > boron > [noun] > compounds boride1863 boron nitride1868 boron hydride1879 borane1916 borohydride1940 borazon1957 1851 Q. Jrnl. Chem. Soc. 3 167 Balmain..discovered about eight years ago a compound of boron and nitrogen, to which..he gave the analogous name, Æthogen. At a later period, he found that all the bodies which he had described..were one and the same substance, namely nitride of boron.] 1868 H. B. Jones & H. Watts Fownes' Man. Elem. Chem. (ed. 10) 225 Boron Nitride.—This compound, containing 11 parts of boron and 14 of nitrogen, is reduced by heating boric oxide with metallic cyanides. 1922 T. M. Lowry Inorg. Chem. xxix. 516 When heated, boron burns in air or in nitric oxide, forming boric oxide, B2O3, and boron nitride, BN, an infusible, insoluble powder. 1961 New Scientist 23 Feb. 484/3 Because of its high thermal stability, boron nitride finds use as a lubricant at very high temperatures when graphite would be decomposed. 2002 Jrnl. Petrol. 43 1790/2 The capsule was placed horizontally in the graphite furnace and packed in boron nitride (BN) to reduce the temperature gradients. < as lemmas |
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