Effects of Ball-Milling Atmosphere on the Thermoelectric Properties of TAGS-85 Compounds

Inspired by the high ZT value lately attained in Ar-protected ball-milled nanocrystalline p-BiSbTe bulk alloy, we report herein an investigation of the effects of ball-milling atmosphere on the thermoelectric (TE) properties of the traditional TE material (GeTe)₈₅(AgSbTe₂)₁₅ (TAGS-85). TAGS-85 samples were prepared via a melting–quenching–annealing process, and then ball-milled in different atmospheres and subsequently densified using a spark plasma sintering technique. The Seebeck coefficient, electrical conductivity, thermal conductivity, and Hall coefficient were measured as a function of temperature from 10 K to 310 K. It was found that different ball-milling atmospheres, i.e., air, liquid N₂ (LN₂), and Ar, profoundly affected the TE properties. A state-of-the-art figure of merit ZT ≈ 0.30 was attained at 310 K in the Ar-ball milled sample. The results are discussed in terms of the carrier concentration, mobility, crystallinity, and the grain boundary scattering.     

高渗透刀轮切割TFT—LCD薄型玻璃基板的工艺影响因素

介绍了切割TFT～LCD薄型玻璃基板的高渗透刀轮和切断的基本概念,以及刀轮角度、切断压力、押入量和切断速度工艺参数对切断效果的影响。采用1150和1250两种不同角度的刀轮在切断速度400mm／s．刀轮押入量0．2mm的条件下进行切割,1150形成的垂直裂纹比1250要深;当其他条件一定时,垂直裂纹随切断压力的增大而增大,随押入量和切断速度的变化不大。     

机械球磨淀粉的阳离子化及其表面施胶作用研究

本文采用机械球磨的方法对木薯淀粉进行活化处理,在分析不同球磨时间淀粉结构性能变化的基础上,研究了机械球磨对木薯淀粉的阳离子化及阳离子淀粉对纸张表面施胶作用的影响。研究结果表明,机械球磨可提高木薯淀粉与醚化剂的反应活性,在醚化剂用量不变的条件下,随着球磨时间的增加,其阳离子淀粉的取代度逐渐增大。机械球磨导致淀粉分子质量下降,影响其阳离子淀粉对纸张的施胶作用。在本研究范围内,机械球磨3h其阳离子淀粉施胶后纸张的环压强度、抗张强度、拉毛速度、抗水性等相对最好。适宜的机械作用可提高其阳离子淀粉对纸张的施胶效果。     

磨刀机在肉食生产中的应用

从磨刀机的原理、结构、应用等方面论述新型磨刀机的特点及应用前景.对磨刀机各部分材料选用,操作等做了进一步说明.     

橡胶制品生产设备使用维护技术讲座（九）

介绍了钢丝帘布裁断机和90。钢丝帘布裁断机的使用范围、技术参数、设备完好标准等。总结分析了钢丝帘布裁断机和90°钢丝帘布裁断机的日常维护保养规程和注意事项。介绍了钢丝帘布裁断机和90°钢丝帘布裁断机的检修、试车与验收的各项工作。分析了～些检修方法和质量标准。     

浅析县级城市规划的编制与落实的政策及其策略

编制一项好的规划要有新的理念,要能够被赋予实施,如何落实规划,还要有一定的方法和策略,规划的实施不但是政府的责任,也是规划师的责任。文章针对县级城市规划的编制与落实进行相关性的探讨。     

Electrochemical performances of Al-based composites as anode materials for Li-ion batteries

Al-C, Al-Fe and Al-Fe-C composite materials have been prepared by high-energy ball milling technique. The electrochemical measurements demonstrated that the Al-Fe-C composites have greatly improved electrochemical performances in comparison with Al, Al-C and Al-Fe anode. For example, Al₇₁Fe₉C₂₀ can deliver the reversible capacity of 436 mAh g⁻¹ at first cycle and 255 mAh g⁻¹ at 15th cycle. This improved electrochemical performance could be attributed to the alloying formation of Al with Fe and the buffering effect by the graphite matrix. This suggests that the Al-Fe-C composite has a potential possibility to be developed as an anode material for lithium-ion batteries.     

装配整体式钢筋混凝土框架梁柱节点的试验研究

介绍一个装配整体式钢筋混凝土框架中柱节点与另一个现浇钢筋混凝土框架中柱节点的对比试验。试验结果表明,梁柱间采用齿槽接头,梁的主筋采用滚轧直螺纹接头的装配整体式梁柱节点的受力性能是可靠的;试验还表明,节点处楼板内的钢筋对梁负弯矩承载力的贡献是很大的,不容忽视,否则就不能满足"强柱弱梁"的要求。     

浅谈钢筋滚压直螺纹套筒连接技术应用

针对钢筋连接的发展状况,介绍了钢筋滚压直螺纹套筒连接技术,并与其他常用的钢筋连接技术作比较,简述了钢筋滚压直螺纹套筒连接技术在工程中的应用与价值,从而进一步推广该技术的应用。     

钢筋剥肋滚轧直螺纹连接施工应用

介绍了与其他钢筋机械连接接头相比钢筋剥肋滚压直螺纹连接接头的特点,阐述了剥肋滚压直螺纹连接的工艺原理、适用范围、工艺特点及施工工艺流程,通过实际应用,证明了该连接技术的可行性及优越性。