NiOOH/Ni(OH)_2电极的发展历程及前景

本文全面而详细地介绍了NiOOH/M(OH)_2电极的发展历程和各阶段存在的问题,本文还对NiOOH/M(OH)_2电极的发展前景作了分析。     

搅拌型干燥机

分类介绍了对流传热、低速搅拌传导传热和高速搅拌传导传热几种类型搅拌干燥机的结构、特征及其适用范围。简要讨论了低速搅拌传导(间接)加热干燥机设计应注意的若干问题,给出了设计计算实例。     

CMC-Pb(N3)2的化合工艺

研究了既能满足导电药混药均匀性要求,又能满足美国军事标准的CMC-Pb(N     

Improving the electrical and mechanical behavior of electrically conductive paint by partial replacement of silver by carbon black

Partial replacement of silver particles by carbon black (low cost) in electrically conductive paint was found to decrease the electrical resistivity and increase the scratch resistance of the resulting thick film, which is for use in electrical interconnections. An effective carbon black content is 0.055 of the total filler volume. By using a total solid volume fraction of 0.1969 and a silane-propanol (1:1 by weight) solution as the vehicle, a paint that gives a thick film with resistivity 2 × 10⁻³ Ω·cm has been attained.     

碳纳米管/环氧树脂复合材料的导电性能研究

采用搅拌和高速剪切分散工艺将碳纳米管(CNT)分散在环氧树脂(EP)中,制成CNT/EP复合导电材料,浇成圆形试样.用表面电阻计测量样品的表面电阻检测其导电性,结果显示随着碳纳米管添加量的增加,复合材料的表面电阻不断降低.碳纳米管添加量为5%时,表面电阻从1012Ω下降到106Ω.使用SEM观测了碳纳米管在环氧树脂中的分散情况.     

Ferromagnetic conductive polypyrrole doped with water-soluble ferrocene derivative

In this paper, we report synthesis and characterization of polypyrrole (PPy) doped with a new water-soluble ferrocene derivative of p-ferrocenyl benzene sulfonic acid (BSAFc). The ferromagnetic conductive PPy powder was obtained by chemical polymerization. XPS and FT-IR were used to clarify the structure of PPy powder and confirm the existence of ferrocene group in the PPy powder. A complete understanding of the electronic structure of iron in PPy powder was achieved by Mössbauer spectrum measured at room temperature, which indicates that ⁵⁷Fe in the PPy powder is in the low-spin electronic structure of trivalence. The PPy powder exhibited an electrical conductivity of about 10⁰ S/cm at room temperature, a coercive force of 20 Oe and saturation magnetization of 1.76 emu/g at low temperature of 1.8 K. Thermogravimetric analysis (TGA) showed that the PPy powder had the same thermostability as normal PPy. The electro-active PPy freestanding film was also synthesized by doping with the new water-soluble ferrocene derivative via electrochemical polymerization, which is significant for developing the application of the PPy film in secondary battery, membrane electrode and so on.     

Doping front migration in intrinsically conductive polymers and its application

Doping front migration is a recently discovered effect occurring in sandwich structures composed of intrinsically conductive polymers. A system based on chemical or electrochemical doping is capable of controlling an integrated display and modifying the electrical resistance of the conductive polymer. The effect does not require a battery and is capable of monitoring time and temperature exposure. Low-cost devices using doping front migration could be the basis of a new class of smart labels for applications such as electronic “best before” labels on food and drink.     

竹编胶合板双面自动喷胶干燥设备

本文提出一种新型的立式双面自动喷胶干燥设备，和卧式单面自动喷胶设备比较更为有效、快捷，并增加了干燥系统。此设备自动化程度大为提高，且降低了涂胶量。     

Modeling of material removal rate in electric discharge grinding process

The mechanism of material removal in electric discharge grinding (EDG) is very complex due to interdependence of mechanical and thermal energies responsible for material removal. Therefore, on the basis of conceived process physics for material removal, an attempt has been made to predict the material removal rate (MRR). The proposed mathematical model is based on the fundamental principles of material removal in electric discharge machining (EDM) and conventional grinding processes. The inter-dependence of the thermal and mechanical phenomena has been realized by scanning electron microscopy (SEM) characterization of the samples machined at different processing conditions. The key input process parameters like pulse on time, pulse current, gap voltage, duty cycle, pulse off time, frequency, depth of cut, wheel speed and table speed are co-related with MRR for three distinct idealized processing conditions. The constant showing the extent of interdependence of two phenomena were evaluated by experimental data. The obtained expressions of MRR have been validated for processing conditions other than those used for obtaining constants. It was found that the discharge energy plays prominent role in material removal. The percentage difference in experimental findings and theoretical predictions was found to be less than 3%.