Phonon Spectrum of Zinc-Blende Boron Nitride

2014 ◽  
Vol 2 (1) ◽  
pp. 96-98
Author(s):  
A. K. Kushwaha
Keyword(s):  
Boron Nitride ◽  
Phonon Spectrum ◽  
Zinc Blende

Effect of polarizability in the phonon spectrum of zinc-blende compounds

1982 ◽  
Vol 114 (1) ◽  
pp. K11-K14 ◽  
Author(s):  
B. B. Tripathi ◽  
H. C. Gupta ◽  
M. V. N. Ambika Prasad
Keyword(s):  
Phonon Spectrum ◽  
Zinc Blende

Phase Transition and Phonon Spectrum of Zinc-Blende Structure ZnX ( X = S, Se, Te)

2010 ◽  
Vol 53 (6) ◽  
pp. 1160-1166 ◽  
Author(s):  
Tan Jia-Jin ◽  
Ji Guang-Fu ◽  
Chen Xiang-Rong ◽  
Gou Qing-Quan
Keyword(s):  
Phase Transition ◽  
Phonon Spectrum ◽  
Zinc Blende ◽  
Zinc Blende Structure

Phonon spectrum of single-walled boron nitride nanotubes

2004 ◽  
Vol 13 (9) ◽  
pp. 1526-1530 ◽  
Author(s):  
Xiao Yang ◽  
Yan Xiao-Hong ◽  
Cao Jue-Xian ◽  
Mao Yu-Liang ◽  
Xiang Jun
Keyword(s):  
Boron Nitride ◽  
Phonon Spectrum ◽  
Boron Nitride Nanotubes

Formation Mechanism of High Dense Form Boron Nitride Under Shock Compression

1983 ◽  
Vol 24 ◽  
Author(s):  
Akira Sawaoka ◽  
Tamotsu Akashi
Keyword(s):  
Boron Nitride ◽  
Shock Compression ◽  
Formation Mechanism ◽  
Structural Changes ◽  
Zinc Blende ◽  
Multiple Shock

ABSTRACTThe structural changes of graphite-like boron nitride caused by multiple shock-compressions were investigated. Wurtzite type, zinc blende type, new modification and amorphous of BN induced by multiple shock-compressions were obtained. Formation mechanism of high dense form boron nitride under shock compression was discussed.

Development of Crystallinity in Turbostratic Boron Nitride Derived from Polymeric Precursors

1991 ◽  
Vol 49 ◽  
pp. 954-955
Author(s):  
X. Qiu ◽  
A. K. Datye ◽  
T. T. Borek ◽  
R. T. Paine
Keyword(s):  
Thermal Treatment ◽  
Boron Nitride ◽  
Diffraction Pattern ◽  
Polymeric Precursors ◽  
Polymer Precursors ◽  
Diffuse Ring

Boron nitride derived from polymer precursors is of great interest for applications such as fibers, coatings and novel forms such as aerogels. The BN is prepared by the polymerization of functionalized borazine and thermal treatment in nitrogen at 1200°C. The BN powders obtained by this route are invariably trubostratic wherein the sheets of hexagonal BN are randomly oriented to yield the so-called turbostratic modification. Fib 1a and 1b show images of BN powder with the corresponding diffraction pattern in fig. 1c. The (0002) reflection from BN is seen as a diffuse ring with occational spots that come from crystals of BN such as those shown in fig. 1b. The (0002) lattice fringes of BN seen in these powders are the most characteristic indication of the crystallinity of the BN.

Structural relationships in the synthesis of cubic boron nitride thin films by ion-assisted deposition

1994 ◽  
Vol 52 ◽  
pp. 638-639
Author(s):  
D. L. Medlin ◽  
T. A. Friedmann ◽  
P. B. Mirkarimi ◽  
M. J. Mills ◽  
K. F. McCarty
Keyword(s):  
Boron Nitride ◽  
Ion Irradiation ◽  
Cubic Boron Nitride ◽  
Film Stress ◽  
Bonded Phases ◽  
Structural Relationships ◽  
Precursor Material ◽  
Pressure Synthesis ◽  
Microstructure Of The Material

The allotropes of boron nitride include two sp2-bonded phases with hexagonal and rhombohedral structures (hBN and rBN) and two sp3-bonded phases with cubic (zincblende) and hexagonal (wurtzitic) structures (cBN and wBN) (Fig. 1). Although cBN is synthesized in bulk form by conversion of hBN at high temperatures and pressures, low-pressure synthesis of cBN as a thin film is more difficult and succeeds only when the growing film is simultaneously irradiated with a high flux of ions. Only sp2-bonded material, which generally has a disordered, turbostratic microstructure (tBN), will form in the absence of ion-irradiation. The mechanistic role of the irradiation is not well understood, but recent work suggests that ion-induced compressive film stress may induce the transformation to cBN.Typically, BN films are deposited at temperatures less than 1000°C, a regime for which the structure of the sp2-bonded precursor material dictates the phase and microstructure of the material that forms from conventional (bulk) high pressure treatment.

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