A liquid lubricated head disk system is introduced. Subjected to high shear rate the rheology of the ultra thin film is different from that of the bulk continuum theory. The shear thinning effect is considered in set...A liquid lubricated head disk system is introduced. Subjected to high shear rate the rheology of the ultra thin film is different from that of the bulk continuum theory. The shear thinning effect is considered in setting up the mathematical model of the ultra thin film rheology. The Reynolds equation and the perturbation theory are employed to set up the static pressure distribution model and to deduce the dynamic pressure equation. The static and dynamic equations are solved by finite difference method. Based on the dynamic analysis the dynamic response of the slider is simulated and some valuable results are obtained about the static and dynamic characteristics of the liquid lubricated head disk systems.展开更多
By electrodeposition in organic system,NiO films with reversible electrochromic property were fabricated.Fluorine-doped tin oxide glass slices were used as substrates,i.e.cathodes.Cyclic voltammetry and ultraviolet-vi...By electrodeposition in organic system,NiO films with reversible electrochromic property were fabricated.Fluorine-doped tin oxide glass slices were used as substrates,i.e.cathodes.Cyclic voltammetry and ultraviolet-visible transmission spectroscopy were adopted to study the electrochromic properties of the films.High resolution transmission electron microscopy(HRTEM) was employed to analyze the composition and structure of the films.It is found that the films are composed of fine NiO crystal grains of a few nanometers in diameter,endowing them with large visible light transmittance variation,rapid switch rate(i.e.rapid response time) between the bleached and colored states.Their cycling durability reached 6000 cycles.展开更多
文摘A liquid lubricated head disk system is introduced. Subjected to high shear rate the rheology of the ultra thin film is different from that of the bulk continuum theory. The shear thinning effect is considered in setting up the mathematical model of the ultra thin film rheology. The Reynolds equation and the perturbation theory are employed to set up the static pressure distribution model and to deduce the dynamic pressure equation. The static and dynamic equations are solved by finite difference method. Based on the dynamic analysis the dynamic response of the slider is simulated and some valuable results are obtained about the static and dynamic characteristics of the liquid lubricated head disk systems.
基金sponsored by the Natural Science Foundation of Shandong Province of China (Grant No. ZR2010EM027)the Applied and Basic Research Project (11-2-4-1-(2)-jch) of Qingdao Municipal Science Technology Commission of China
文摘By electrodeposition in organic system,NiO films with reversible electrochromic property were fabricated.Fluorine-doped tin oxide glass slices were used as substrates,i.e.cathodes.Cyclic voltammetry and ultraviolet-visible transmission spectroscopy were adopted to study the electrochromic properties of the films.High resolution transmission electron microscopy(HRTEM) was employed to analyze the composition and structure of the films.It is found that the films are composed of fine NiO crystal grains of a few nanometers in diameter,endowing them with large visible light transmittance variation,rapid switch rate(i.e.rapid response time) between the bleached and colored states.Their cycling durability reached 6000 cycles.
