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the aspects of dynamics of CaO and HCl from the reaction kinetics theory and got activation energy of the gas–solid reaction and the reaction gas diffusion through the product layer respectively... thermogravimetric analyzer and X-ray diffraction. WAN [5] studied the reaction mechanism of removing HCl gas by calcium oxide at 600–800 °C and found that the restriction factor is the gas diffusion......
+ in the phosphor Y2O3:Eu3+ prepared by the surface diffusion can be reduced greatly owing to the activator, Eu3+ ions, distributing mainly in the outer layer of the phosphors where the photon..., we developed a simple and economical way to embed the activator Eu3+ into the outer surface layer of the bulk Y2O3; and surface diffusion method (SDM), in order to save the cost of the phosphors......
the deformation ratio. A layer of yttrium oxide powder was laid between the specimens and the pressure bars to avoid bonding of them. Diffusion bonding was carried out in the vacuum furnace (Centorr-M60...; (1) where D0 is prefix coefficient; Qi is diffusion activation energy; R is molar gas constant......
has been explored in this paper. Then the mechanically robust Ti(C,N) diffusion layer was synthetized directly on the grates by laser carbonitriding in the mixture gas of nitrogen and methane. The results shows that the carbonitriding process is accelerated by temperature enhancement with decreasing scanning speed. The Ti(C,N) diffusion layer is kept at 2 μm in thickness, when the scanning speed......
Combustion behavior and influence mechanism of CO on iron ore sintering with flue gas recirculationFAN Xiao-hui(范晓慧), YU Zhi-yuan(余志元), GAN Min(甘敏), CHEN Xu-ling(陈许玲), JI Zhi-yun(季志云) (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China)Abstract:The properties of circulating gas have a significant effect on sintering with flue gas recirculation......
and surface accessibility are crucial to maintaining the high and fast response of nanocrystals, whereas the recovery characteristic is decided by the framework of the gas diffusion toward the sensing... factor that determines the recovery characteristic. According to LEE [24], plenty of nanoflakes with hierarchical architecture can provide various micro- and nano-porosity for effective gas diffusion......
process is not easy to occur at lower carrier pressure and throat diameter. The main factors influencing condensation onset are boundary layer thickness, heat capacity of carrier gas and expansion rate. All...Effect of carrier gas pressure on vapor condensation and mass flow-rate in sonic nozzleDING Hong-bing(丁红兵), WANG Chao(王超), CHEN Chao(陈超) (Tianjin Key Laboratory of Process Measurement and Control......
, and the interface hardness decreased. Key words: heat treatment; explosive welding; intermetallic compound; standoff distance; diffusion layer Cite this article as: Khanzadeh GharahShiran Mohammad Reza... of this sample compared with BS2, BS3 and BS4 samples, it had a thicker melted layer before heat treatment and thicker diffusion layer after heat treatment (Table 3). Figure 2 OM images of joint interface......
J. Cent. South Univ. (2017) 24: 861-865 DOI: 10.1007/s11771-017-3488-7 Breakdown characteristics of CF4 and CF4/N2 hybrid gas in refrigeration temperature range HOU Meng-xi(侯孟希)1, LI Wei-guo(李卫国)1... of State Grid Hunan Electric Power Corp, Changsha 410000, China Central South University Press and Springer-Verlag Berlin Heidelberg 2017 Abstract: Common insulation gas cannot normally work in refrigeration......
composition of the steel changes by diffusion of carbon and or nitrogen and result in hard outer surface with good wear resistance properties. A striking feature of Gas Carburizing process...Evaluation of Process Capability in Gas Carburizing Process to Achieve Quality through Limit Design Concept K.Palaniradja1,N.Alagumurthi1,V.Soundararajan1 (1.Department of Mechanical Engineering......