Synthesis of amorphous boron nitride from the molecular precursor ammonia-monochloroborane

被引：18

作者：

Ketchum, DR ^{[1
]}

DeGraffenreid, AL ^{[1
]}

Niedenzu, PM ^{[1
]}

Shore, SG ^{[1
]}

机构：

[1] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

来源：

JOURNAL OF MATERIALS RESEARCH | 1999年 / 14卷 / 05期

关键词：

D O I：

10.1557/JMR.1999.0260

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ammonia-monochloroborane, NH3BH2Cl, has been synthesized from the reaction of ammonia-borane with HCl in Et2O. Decomposition of the solid under NH3 to 600 degrees C produced amorphous BN in 97% yield. The B-11 magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectrum of the amorphous BN is indicative of boron in the same environment as in hexagonal BN. Subsequent pyrolysis of the amorphous BN to 1000 degrees C produced turbostratic BN. Pyrolysis of NH3BH2Cl under vacuum to 1100 degrees C led to the formation of turbostratic BN as confirmed by x-ray diffraction (XRD) analysis. Gas evolution during this pyrolysis confirmed that the precursor loses H-2 and HCl.

引用

页码：1934 / 1938

页数：5

共 18 条

[1]

BALMAIN WH, 1842, J PRAKT CHEM, V27, P442

[2] Dibromoborane-Dimethyl Sulfide: A Simple Molecular Precursor for the Formation of Bulk Powders and Fiber Coatings of Boron Nitride [J].