查询词典 directly heated cathode

Analytical results show that: Anode evaporation rate, which determines mostly the production rate of UFMP, is influenced by the many factors including electric parameters of arc, ambient conditions and material properties et al; Existence and increase of anode ejection can influence the production rate and property of UFMP; It is firstly found and investigated that surface connexity phenomenon of Al anode material. Analyses and calculation show that formation of anode spot and existence of self-magnetic field force play an important part in surface connexity process; Effects of cathode material on prepared UFMP is also experimentally studied and theoretically analysed. It shows that effect of the cathode is inconsiderable under the experimental conditions used in the study. At last, the experimental results found in part one are analysed and discussed in detail.

然后详细分析了电弧与电极间的相互作用过程，结果表明：决定超微粉产率的阳极材料蒸发率受许多因素影响，它主要与电弧电参量，环境条件及材料性质有关；阳极表面液滴喷溅的存在和加剧将严重地影响所制超微粉的产率和性质；首次发现和实验研究了Al阳极表面凸起现象，并对此现象进行了详细的理论分析和实际估算，认为阳极斑点的形成及自磁场作用力的存在在该过程中起着重用作用；实验研究和理论分析了阴极材料对所制超微粉的影响，认为在本文所用实验方法及条件下，阴极材料对粉的影响很小。

Production Technique: Most of the countries in the world use the method of rolling constant electrolysis to electrolyze copper foil. Its cathode roller is usually spinned into seamless cathode roller whose surface is even. The rollers are connected through sealing technique.

三、生产工艺：目前世界上大多数国家生产电解铜箔采用辊式连续电解方法，其阴极辊筒一般都是经过旋压制成的无缝阴极辊筒，具有均匀的表面性能，采用焊接工艺制造。

The only difference between these two cells was that in Lenard's cell the electrons were taken from the cathode by light, whereas on the "3-electrode lamp" the cathode is a white-hot filament capable of sending into the vacuum currents of much higher intensity.

在研究过程中，莱纳德还发明了一种光电管，以加速电子和测量它们的能量，这种光电管是三极管最初的雏形，不同之处在于，在莱纳德的光电管中，电子是由阴极光发射的，而三极管中的阴极是白炽丝，可以向真空发射更高强度的电流。

In early November he was repeating an experiment with one of Lenard's tubes in which a thin aluminium window had been added to permit the cathode rays to exit the tube but a cardboard covering was added to protect the aluminium from damage by the strong electrostatic field that is necessary to produce the cathode rays.

在1895年伦琴正在调查外部影响的各类真空管设备，仪器由海因里希赫兹，约翰希托夫，威廉克鲁克斯，尼古拉特斯拉和菲利普冯勒纳德，放电时，是通过他们。 [ 7 ]在11月初他是在重复实验之一勒纳德的管道，其中一个薄铝窗口增加了允许退出阴极射线管，但纸板覆盖增加了保护铝损坏的强烈静电场是必要的生产阴极射线。

Two half anode cathode slice thermo electrical models with the collector bars installed slopingly or horizontally were adopted to calculate the potential drop and electricity distribution of the cathode .

结果表明，不同的阴极导杆安装方法对导流槽阴极的总电位降大小没有明显影响，但是水平阴极导杆安装更有利于阴极表面电流密度的均匀分布。

More appropriate electrochemistry reacts the condition is:訧 R-Ta/Ti is positive pole, electric stone Chinese ink board is zincous electrolyte for L-1 H2SO4 of cathode;4mol ·, l-1 H2SO4 of · of 2mol · L-1 VOSO4-2mol mixes solution to be cathode electrolyte, electroanalysis at 1A 6h.

较适宜的电化学反应条件为：以Ir-Ta/Ti为阳极，导电石墨板为阴极；4mol·L-1 H2SO4为阳极电解液，2mol·L-1 VOSO4-2mol·L-1 H2SO4混合溶液为阴极电解液，于1A电解6h。

The surface state and electrochemistry properly platinum-plated on open-cell foamed titanium electrode was investigated and he compared with IrTi anode and platinum-plated titanium toil cathode. The results show that open-cell foamed titanium can uniformly coat with excellent bonding strength platinum-plated, thickness coating 2 μm. The cathode release hydrogen voltage of platinum-plated on open-cell loamed titanium electrode is fall. The anode release oxygen voltage of platinum-plated on open-cell foamed titanium electrode is higher than Irli anode in high current.

采用电镀技术在多孔钛表面沉积了均匀的铂金属层，分析了多孔钛镀铂后的表面状态及电化学性能，并与IrTi涂层阳极及镀铂钛网阴极进行比较，结果显示：多孔钛板开孔孔隙表面可均匀沉积结合力良好的铂层，镀层厚度为2μm；镀铂多孔钛阴极析氢电位比镀铂钛网高，且在大电流下，阳极析氧电位比IrTi涂层阳极高。

As for PAn-based composites, the influences of the kinds of oxidant, the amount of hydrochloric acid and barbon black on conductivity were investigated, Li/PAn button-type secondary batteries were assembled with PAn-based composites which were synthesized by chemical oxidative polymerization and used as cathode, the influences of the kinds of oxidant, synthesized technics, conducting carbon black added mode and PAn/metal oxide composites used as cathode on the properties of these batteries were studied.

对于聚苯胺基复合材料体系，研究了氧化剂种类、盐酸用量、炭黑用量对复合材料电导率的影响；以化学法制备的聚苯胺基复合材料作正极组装了Li/PAn二次扣式电池，探讨了氧化剂种类、聚合工艺、导电剂的加入方式以及PAn与金属氧化物复合后作电池正极的性能。

Arc plasma has many advantages, such as high temperature、 high energydensity and so on. It has been applied in the field of cutting、 welding、 metallurgyand material prepared etc, but there is a long-term problem in the field of the arcplasma technology, which is how to reduce cathode erosion to increase the life-timeof arc plasma generator, so many scholars in the world have been studying theproblem on the cathode erosion.

电弧等离子体具有温度高、能量密度大和对环境污染小等特点，它已被广泛应用于切割、焊接、冶金、材料制备等领域，但是在电弧等离子体技术中，怎样减少阴极烧损提高等离子体发生器的寿命是电弧等离子体技术中一个长期问题，因而国内外的许多学者仍在对阴极烧损这个问题进行研究；本文围绕&通过提高阴极表面温度，增强阴极表面的电子发射能力，来增大阴极弧根直径，进而降低电弧通过阴极弧根传入阴极表面的有效比热流，以达到减小阴极烧损的目的。&

The plasma arc generator comprises cathode, two anodes and insulating strip between two anodes, first anode is cylindrical hollow sleeve, the cylinder cathode is placed in the centre of said sleeve, and an annular fluid channel is formed between both the lower portion of first anode is equipped with a hole as fluid outlet, and second anode is a circular plate with central hole, between two anodes there is an insulating strip, the diameter of central hole of second anode is less than the diameter of lower hole of first anode.

本发明是一种串式多级压缩等离子弧发生器，由阴极、两阳极及阳极之间的绝缘片组成，第一阳极为圆柱形空心套管，圆柱体阴极处于该套管中心，并在两者之间形成环状流体通道，第一阳极下部是一个供流体出口的横截面为圆的孔，第二阳极是中心开孔的圆形板，两阳极之间有绝缘片，第二阳极中心孔的直径小于第一阳极下部孔的直径。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。