Glass Transition and Crystallization in Hexagonal Boron Nitride: Crucial Role of Orientational Order

2019 ◽  
Vol 3 (2) ◽  
pp. 1900174
Author(s):  
R. Ravinder ◽  
Prateet Garg ◽  
N. M. Anoop Krishnan
Keyword(s):  
Glass Transition ◽  
Boron Nitride ◽  
Crucial Role ◽  
Hexagonal Boron Nitride ◽  
Orientational Order

Role of size of hexagonal boron nitride particles on tribo-performance of nano and micro oils

2018 ◽  
Vol 30 (8) ◽  
pp. 441-456 ◽  
Author(s):  
Manoj Kumar Gupta ◽  
Jayashree Bijwe ◽  
Meghashree Padhan
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride

scholarly journals It's a Gas: Oxidative Dehydrogenation of Propane over Boron Nitride Catalysts

2020 ◽  
Author(s):  
Peter Kraus ◽  
R. Peter Lindstedt
Keyword(s):  
Low Temperature ◽  
Boron Nitride ◽  
Gas Phase ◽  
Oxidative Dehydrogenation ◽  
Hexagonal Boron Nitride ◽  
Combustion Model ◽  
Low Temperature Combustion ◽  
Oxidative Dehydrogenation Of Propane ◽  
Temperature Combustion

We investigate the role of gas-phase phenomena in the heterogeneous oxidative dehydrogenation of propane over hexagonal boron nitride. We apply a recently developed gas-phase combustion model for low-temperature combustion of propane and couple it with several surface microkinetic mechanisms to probe the selectivity limits using the open-source flame solver Cantera. We show that while the conversion of propane is surface-driven, the selectivities are significantly influenced by the gas-phase, especially when dilute catalyst beds are used.<br>

scholarly journals AB-stacked nanosheet-based hexagonal boron nitride

2021 ◽  
Vol 77 (2) ◽  
Author(s):  
Jae-Kap Lee ◽  
Jin-Gyu Kim ◽  
K. P. S. S. Hembram ◽  
Seunggun Yu ◽  
Sang-Gil Lee
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Metastable Phase ◽  
Stacking Sequence ◽  
Lateral Growth ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure High Temperature ◽  
Crystalline Growth

Hexagonal boron nitride (h-BN) has been generally interpreted as having an AA stacking sequence. Evidence is presented in this article indicating that typical commercial h-BN platelets (∼10–500 nm in thickness) exhibit stacks of parallel nanosheets (∼10 nm in thickness) predominantly in the AB sequence. The AB-stacked nanosheet occurs as a metastable phase of h-BN resulting from the preferred texture and lateral growth of armchair (110) planes. It appears as an independent nanosheet or unit for h-BN platelets. The analysis is supported by simulation of thin AB films (2–20 layers), which explains the unique X-ray diffraction pattern of h-BN. With this analysis and the role of pressure in commercial high-pressure high-temperature sintering (driving nucleation and parallelizing the in-plane crystalline growth of the nuclei), a growth mechanism is proposed for 2D h-BN (on a substrate) as `substrate-induced 2D growth', where the substrate plays the role of pressure.

Analysis of the fluorescence of mechanically processed defect-laden hexagonal boron nitride and the role of oxygen in catalyst deactivation

2019 ◽  
Vol 118 (4) ◽  
pp. 153-158
Author(s):  
David J. Nash ◽  
Katerina L. Chagoya ◽  
Alan Felix ◽  
Fernand E. Torres-Davila ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Catalyst Deactivation ◽  
Hexagonal Boron Nitride

Role of defects in the process of graphene growth on hexagonal boron nitride from atomic carbon

2014 ◽  
Vol 105 (19) ◽  
pp. 191610 ◽  
Author(s):  
J. Dabrowski ◽  
G. Lippert ◽  
T. Schroeder ◽  
G. Lupina
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Atomic Carbon ◽  
Graphene Growth

scholarly journals Surfactant-exfoliated 2D hexagonal boron nitride (2D-hBN): role of surfactant upon the electrochemical reduction of oxygen and capacitance applications

2017 ◽  
Vol 5 (8) ◽  
pp. 4103-4113 ◽  
Author(s):  
Aamar F. Khan ◽  
Michael P. Down ◽  
Graham C. Smith ◽  
Christopher W. Foster ◽  
Craig E. Banks
Keyword(s):  
Boron Nitride ◽  
Electrochemical Reduction ◽  
Hexagonal Boron Nitride ◽  
Aqueous Media ◽  
Sodium Cholate ◽  
Electrochemical Reduction Of Oxygen

Surfactant-exfoliated 2D hexagonal boron nitride (2D-hBN) nanosheets are fabricated using the surfactant sodium cholate in aqueous media and are explored towards the electrochemical reduction of oxygen.

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