La6Cd0.75Ga2Q11.5Cl2.5 (Q = S and Se): Two New Nonlinear Optical Chalcohalides with Large Laser-Induced Damage Threshold (LIDT)

CrystEngComm ◽  
2021 ◽  
Author(s):  
Feng Lin ◽  
Mengjia Luo ◽  
Ruiqi Wang ◽  
Xiangli Che ◽  
Fu Qiang Huang
Keyword(s):  
High Temperature ◽  
Functional Groups ◽  
Nonlinear Optical ◽  
Damage Threshold ◽  
Temperature Reaction ◽  
High Temperature Reaction ◽  
Reaction Flux ◽  
Laser Induced Damage

Two new chalcohalides La6Cd0.75Ga2Q11.5Cl2.5 (Q = S and Se) with mixed-anionic functional groups were synthesized by high temperature reaction using LaCl3 as reaction-flux. Both compounds crystalize in the non-centrosymmetric space...

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.

Effect of Mineral Composition and Sintering Temperature on the Synthetic Cordierite

2014 ◽  
Vol 633 ◽  
pp. 61-64
Author(s):  
Lei Li ◽  
Rui Long Wen ◽  
Xiao Guang Zhang ◽  
Cheng Biao Wang ◽  
Ming Hao Fang ◽  
...  
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
Flexural Strength ◽  
Mineral Composition ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Temperature Reaction ◽  
Final Phase ◽  
High Temperature Reaction ◽  
Industrial Alumina

Cordierite samples were prepared using quartz sand tailings, industrial alumina and magnesite tailings as raw materials by high-temperature reaction. The influence of mineral composition and sintering temperature on the final phase composition and physical properties of cordierite were studied. The results shown that a large number of cordierite generated at 1300 °C. When the ratio of Al2O3/SiO2 equals to 1.08, the flexural strength of samples increased to 27.66 MPa.

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