scholarly journals Raman study of the Verwey transition in magnetite at high-pressure and low-temperature: Effect of Al doping

2012 ◽  
Vol 112 (4) ◽  
pp. 043510 ◽  
Author(s):  
L. Gasparov ◽  
Z. Shirshikova ◽  
T. M. Pekarek ◽  
J. Blackburn ◽  
V. Struzhkin ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Temperature Effect ◽  
Verwey Transition ◽  
Al Doping ◽  
Raman Study

scholarly journals Magnetite: Raman study of the high-pressure and low-temperature effects

2005 ◽  
Vol 97 (10) ◽  
pp. 10A922 ◽  
Author(s):  
L. V. Gasparov ◽  
D. Arenas ◽  
K.-Y. Choi ◽  
G. Güntherodt ◽  
H. Berger ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Temperature Effects ◽  
Raman Study

Raman study of solid HBr under high pressure and low temperature

1999 ◽  
Vol 263-264 ◽  
pp. 795-798 ◽  
Author(s):  
T Kume ◽  
T Tsuji ◽  
S Sasaki ◽  
H Shimizu
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Raman Study

Low temperature, high pressure Raman study of SbSBr

1990 ◽  
Vol 2 (2) ◽  
pp. 135-143 ◽  
Author(s):  
Hans D. Hochheimer ◽  
Gerasimos A. Kourouklis ◽  
Takashiinushima
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Raman Study

High-Pressure Raman Study of Liquid and Crystalline CH2F2up to 29 GPa

1994 ◽  
Vol 63 (3) ◽  
pp. 934-940 ◽  
Author(s):  
Wu Youhong ◽  
Mitsukazu Onomichi ◽  
Shigeo Sasaki ◽  
Hiroyasu Shimizu
Keyword(s):  
High Pressure ◽  
Raman Study

Low-Temperature Hydrogenation of Mg-Ni-Nb2O5 Alloy Processed by High-Pressure Torsion

2021 ◽  
pp. 160309
Author(s):  
M. Osorio-García ◽  
K. Suárez-Alcántara ◽  
Y. Todaka ◽  
A. Tejeda-Ochoa ◽  
M. Herrera Ramírez ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
High Pressure Torsion

Study of high-pressure air jet controlled compression ignition with compound thermodynamic cycle for combustion and emission formation process

2020 ◽  
pp. 146808742096933
Author(s):  
Xiangyu Meng ◽  
Sicheng Liu ◽  
Jingchen Cui ◽  
Jiangping Tian ◽  
Wuqiang Long ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Low Temperature ◽  
Formation Process ◽  
Combustion Process ◽  
Thermodynamic Cycle ◽  
Compression Ignition ◽  
Temperature Reaction ◽  
Air Jet ◽  
High Temperature Reaction

A novel method called high-pressure air (HPA) jet controlled compression ignition (JCCI) based on the compound thermodynamic cycle was investigated in this work. The combustion process of premixed mixture can be controlled flexibly by the high-pressure air jet compression, and it characterizes the intensified low-temperature reaction and two-stage high-temperature reaction. The three-dimensional (3D) computational fluid dynamics (CFD) numerical simulation was employed to study the emission formation process and mechanism, and the effects of high-pressure air jet temperature and duration on emissions were also investigated. The simulation results showed that the NOx formation is mainly affected by the first-stage high-temperature reaction due to the higher reaction temperature. Overall, this combustion mode can obtain ultra-low NOx emission. The second-stage high-temperature reaction plays an important role in the CO and THC formation caused by the mixing effect of the high-pressure air and original in-cylinder mixture. The increasing air jet temperature leads to a larger high-temperature in-cylinder region and more fuel in the first-stage reaction, and therefore resulting in higher NOx emission. However, the increasing air jet temperature can significantly reduce the CO and THC emissions. For the air jet duration comparisons, both too short and too long air jet durations could induce higher NOx emission. A higher air jet duration would result in higher CO emission due to the more high-pressure air jet with relatively low temperature.

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