首页期刊导航|Key engineering materials
期刊信息/Journal information
Key engineering materials
Trans Tech Publications Ltd.
Key engineering materials

Trans Tech Publications Ltd.

半月刊

1013-9826

Key engineering materials/Journal Key engineering materials
正式出版
收录年代

    Temperature cycle measurement system based on single chip computer

    Xi YinXiaojun WangYongque Xie
    487-492页
    查看更多>>摘要：This thesis introduces a low cost and high precision temperature cycle measurement system with adoption of PT100 as temperature sensor, with single chip computer as the core. The method of sub-three-wire connection is proposed for engineering practice, then, can eliminate the effects of lead wire resistance and simplify the external cable connection. We discuss and research circuit component selection, circuit design, improving system reliability, and a software method of piecewise linearization process is adopted, thus we ensure exact and reliable measure and the system characteristic of low cost and high precision.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Study on phase matching in parametric six-wave mixing in Rb

    Changjun ZhuHanchen LiuXuejun ZhaiBing Xue...
    493-496页
    查看更多>>摘要：Parametric six-wave mixing processes have been achieved in Rb and two parametric six-wave mixing channels, 5S→→5D →→6P→→6~2S_(1/2)→→5 ~2P_(1/2)→→5S and 5S→→5D→→6P→ →6~2S_(1/2)→→5~2P_(3/2)→→5S, have been identified. Competition between the two channels is observed and, furthermore, phase matching conditions in the two channels are analyzed and calculated. The calculation results agree well with the experimental observations, indicating that the phase matching is the main factor governing the competition between the two parametric six-wave mixing channels.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Effect of mortar-pestle grinding on conductivity of ferric chloride doped polypyrrole

    Yuan Ming HuangFu-fang ZhouZhuo-ran SheChunxu Pan...
    497-500页
    查看更多>>摘要：With four-probe technique, we investigated the effects of the mortar-pestle grinding on the conductivity of ferric chloride doped conducting polymer polypyrrole, which had been synthesized by in situ polymerizing the monomer pyrrole in aqueous solutions in the presence of the oxidant iron (III) chloride. As the mortar-pestle grinding duration increased from 0 to 4 hours, the conductivity of the synthesized polypyrrole was found to decrease from about 100 to 10 S/m. In the meantime, the sizes of the grinded polymeric particles were found to decrease from 40.6 to 3.36 μm as the grinding duration increased from 0 to 4 hours. Our results demonstrated that the grinding shortened conjugation lengths of the polymeric chains should be responsible for the decrease in the conductivity of the polymer.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Fabrication of ZnO thin film transistors based on the substrate of glass

    X. YangC. WangC. ZhaoW. Tang...
    501-504页
    查看更多>>摘要：In our paper, we induced the process of ZnO based thin film transistors (ZnO-TFTs) fabricated on the substrate of glass. The photolithographic plate designed for using in the ZnO-TFT devices fabrication process was shown in our paper. The ZnO-TFT devices were fabricated successfully, the I_(on/off) ratio is ～10~4.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    An analysis for ground diffraction about detecting beyond the horizon using television-based bistatic detection system

    Qiang GuoYukui LiBaoning GaoRan Tao...
    505-510页
    查看更多>>摘要：Analysing the characteristics of a television transmitter carefully, the paper compares the television-based bistatic radar with the conventional monostatic and bistatic radar on targets detecting beyond the horizon in some given direction. In the light of the effect of ground diffraction produced by electromagnetic wave propagation on different radar ranges, it is shown that television-based bistatic radar has a potential advantage over conventional radar in targets detecting beyond the horizon because of its particular advantages in height gain and diffracting efficiency. At the same time, we have an in-depth study which is the decisive factor on radar ranging, height gain or diffraction effect, conduct an effective method of how determine the optimal wavelength so as to get the maximum radar detecting range.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Study on preparation of ultrafine NiFe_2O_4 particles by microemulsion method

    Lingyun ZhangHansheng LiHanmin GuanDechun Zhu...
    511-514页
    查看更多>>摘要：Ultrafine NiFe_2O_4 particles with spinel structure were prepared in the system of water-in-oil microemulsion of water/Triton X-100/n-hexanol/cyclohexane. The effects of calcining temperature and the other operation conditions were systematically discussed based on the techniques of SEM, XRD, VSM and so on. The result showed that NiFe_2O_4 nanoparticles, with a narrow size distribution(30-70nm), could be obtained by microemulsion method. The crystal grain diameter of the ultrafine NiFe_2O_4 particles could be enhanced with the improvement of the calcining temperature, the molar ratio of water to surfactant (w=[H_2O]/ [surfactant]) and the concentration of Fe~(3+)(or Ni~(2+)), respectively. The VSM plots showed that the ferrimagnetic behavior was expected for this type of magnetic material. The XRD patterns and DTA-TG curves revealed that the optimal calcining temperature of NiFe_2O_4 sample was at around 500℃. The relation between the average particle size (D) and the value of w could be expressed as D=13.91 l+0.2628w. Moreover, it was indicated that low concentration of Fe~(3+)(or Ni~(2+)) was beneficial to the formation of small and regular NiFe_2O_4 particles.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Self-similarity of electrochemically-deposited copper films on porous silicon

    Lan-li ChenBao-gai ZhaiYuan Ming Huang
    515-518页
    查看更多>>摘要：The micro-structures of electrochemically-deposited copper control electrode on semiconducting porous silicon films were investigated with scanning electron microscopy. Our results showed that smooth control electrode could be grown in areas far from the edge of porous silicon film while irregular electrode was formed on the circular edge of porous silicon films. The self-similarity of the electrochemically-deposited copper control electrode was analyzed in details.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Multi-channels PCs polarization filter and analysis of influence factors

    Jianping ShiYuan HuangSongling Wen
    519-523页
    查看更多>>摘要：We present a multi-channel PCs polarization filter, which overcomes the disadvantage of the low channel numbers in the existing filters. The multi-channel PCs polarization filter is based on one dimensional photonic crystal with a defect layer. The simulation results by transfer matrix method show that the filter can realize more than four filtering channels with the separation degree better than 0.95 and the transmission rate more than 50%, and the channels are almost distributed evenly. We also analyze the influence factors of filter performance. The results show that defect layer thickness of photonic crystal determines the number of filter channels. The thickness and number of unit layers of photonic crystals does not affect the number of filter channels, however it can adjust the location of central wavelength for each filter channel.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Study on polyurethane/polyurethane emulsion water-based ink

    C. Q. FangM. R. ZhangT. H. LiS. S. Zhou...
    524-527页
    查看更多>>摘要：In this paper, polyurethane and its emulsion, with appropriate additives added, are used as binder to replace the traditional resin binder in the experiment of making water-based ink. And then the main mechanism of each component is analyzed. It is indicated that the emulsion makes the binder soak through the paint faster and infiltrate into the particles pores of pigments aggregates by reducing the tension on the surface of monomer and water. Thickener can enhance the viscosity of ink and promote the well-proportioned dispersion of pigment mainly by making the water-based ink form a network on the structure. The surface-active molecules, forming "a protective shell" on the surface of paint, effectively strengthen the affinity between the binder and pigment to make them be fully reconciled and ultimately improve the performance of water-based ink.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Characteristics of networked manufacturing resources

    Kai YinJuan TuXiao-jun Wang
    528-532页
    查看更多>>摘要：Along with the networked manufacturing technology development and deep research of resources classification, the question of resource management appears prominently. Resources attribute constitution has been analyzed under the network manufacture environment from the resources classification management; the resources attribute and the data exchange form have been proposed under the isomerism environment.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd