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In this paper, we designed a group of horizontal Hall sensors in 0.35 µm BCD (bipolar/CMOS/DMOS) technology. Compared with the existing Hall devices, the design has improvement in parts such as Hall cell parameter set and layout design under BCD technology. And then the Hall chip is taped out. The results from the precise experiment of the Hall cell verify the optimization method which can be used...
Pyrolytic tire char was used to prepare activated carbon by steam. The effects of such factors as pretreatment, activation temperature, rate of water vapor and activation time upon the adsorption properties of AC have been investigated. The prepared activated pyrolytic tire char were characterized by N2 physisorption, XRD, FT-IR and elemental analyses. The optimum process parameters and listed as...
There are large quantities of heat produced in the machining process of cartridge type structures(58SiMn steel) is wasted, it is necessary to recycle and make use of these heat from the perspective of environmental protection and energy saving. In this paper the waste heat recovery system that based on heating pump were analyzed, including the system composition, working principle, the thermal parameters,...
A model of two-dimensional photonic band gap (PBG) structures resonant cavity made by GaAs pillars in air with graphite lattice is proposed. Its TE and TM mode resonant wavelength simultaneously changing with temperature and force is calculated by finite-difference time-domain (FDTD) method. The results show that the wavelength of the resonant cavity simultaneously changed with temperature and force...
Polyimide (PI) is a widely used wiring insulation material for aircraft. Given the harsh environment of its employment, wiring insulation material for aircraft suffers from various degradation processes which may cause failure of electrical insulation. In this paper, the dielectric response of PI to thermal degradation and to saline exposure is investigated. To investigate the effect of thermal exposure,...
Catalytic systems based on activated carbon(AC) modified by manganese oxide were investigated for the hydrolysis of carbonyl sulfide (COS) in a fixed-bed reactor. The catalysts were prepared by immersion method. Effect of preparation conditions on catalytic activity were studied, including calcination temperature, content of active component, drying temperature after immersing alkali and addition...
Tungsten oxide nanostructures have been paid much attention because of their particular physics and chemical properties. But until now, it is difficult to realize patterned growth of tungsten oxide nanowire arrays. In this paper, we demonstrate that tungsten oxide nanowire arrays can be controllably synthesized in patterned arrays at low temperature of 550°C by a simple ceramic template method. The...
One novel adsorption materials, Mn-loaded iron ore sinter (Mn-IOS), has been conducted to remove arsenate (As (V)) and arsenite (As (III)). The conversion of As (III) to As (V) caused by manganese ion in adsorption progress would be beneficial to adsorption, and therefore, Mn-IOS had a better removal performance of As (III). Results of orthogonal tests suggested that temperature was an important factor,...
Ethylene-tetrafluoroethylene (ETFE) is one of several polymers used in electrical insulation of aircraft wiring. The integrity of the insulation is important to the aerospace industry due to potential catastrophe in the event of an electrical fire caused by breakdown of the wiring insulation. In this work, the relative permittivity of ETFE is studied in order to examine the feasibility of developing...
Integrated Heat Spreader (IHS) lids are increasingly being used in flip-chip package technology to enhance power and thermal capabilities. Adequate adhesion of the thermal interface material (TIM) and lid sealant materials are required to not only provide a continuous thermal interface, but also to permit manufacturability. This paper outlines criteria to aid in the material selection process for...
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