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等离子体电弧
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  plasma arc
     Carbon nanotubes (CNTs) are prepared by means of plasma arc method in this paper. During this experimentation,anode and cathode which are made of graphite material are introduced,Fe/Co/Ni catalyst,S grow substance,H_2/Ar and H_2/He buffer gas.
     借助于等离子体电弧方法,利用石墨材料做阴极和阳极,Fe/Co/Ni作催化剂,S为助长剂,H2/Ar和H2/He作为缓冲气体,制备了碳纳米管.
短句来源
     The Measurement and Analysis of Argon Plasma Arc Temperature Distribution Using Off-axis Peak Intensity Method
     用离轴峰值法测定氩等离子体电弧的温度分布
短句来源
     The conclusion that the environmental temperature of reactor is below 373K is obtained by calculation on the base of pressure module, whereas the temperature of plasma arc axis is about from 5000K to 6500K by calculating current density and conductive rate.
     从电流密度和电导率角度计算出等离子体电弧场中心温度高达5000-6500K;
短句来源
     The preparation for CNTs of high quality is the basis of their theoretical and application study. Consequently SWNTs are prepared through plasma arc discharge method, and in this method graphite powder is used as raw material, Fe/Co/Ni as catalyst, FeS as growth substance, H_2/Ar as buffer gas.
     由于制备出高质量的碳纳米管是对其进行理论研究和应用研究的前提条件,因此本文采用石墨粉为原料,Fe、Co、Ni作为催化剂,FeS为助长剂,H2和Ar作为缓冲气体,应用等离子体电弧法来制备单壁碳纳米管。
短句来源
     Methods and Comparisons on Building Capillary Plasma Arc
     几种毛细管等离子体电弧起弧方法与比较
短句来源
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  “等离子体电弧”译为未确定词的双语例句
     The uniformity of large area diamond filrns in deposition process and quality of diamond films is researched. The results show tha the DC arc used for deposition of diamond films is uniform.
     研究了大面积金刚石膜沉积过程中的均匀性问题和金刚石膜质量的均匀性问题.研究表明:用于生长金刚石膜的大面积磁旋转等离子体电弧是均匀的,能使气体混合均匀:金刚石膜在形核阶段是均匀的;
短句来源
     1Cr17 stainless steel nanoparticles and its carbon-coated nanoparticles were produced by hydrogen arc plasma method in ( H2 + Ar) and CH4, respectively. The nanoparticles were characterized by X-ray diffraction (XRD) , transmission electron microscopy (TEM) , thermal analysis system (DSC) , etc.
     用氢等离子体电弧法分别在(H2+Ar)和 CH4气氛下制备了1Cr17铁素体不锈钢纳米粒子,通过X射线衍射仪(XRD)、差热分析仪(DSC)、高分辨透射电镜(HRTEM)对两种不锈钢纳米粒子的结构和形貌进行了分析。
     The highly stable non transfer magnetic arc is produced. Its length is 400 mm and its diameter is about 60 mm.
     获得电弧长度为400mm最大直径约为60mm十分稳定的等离子体电弧
短句来源
     Firstly,the mixture of Al and AIN nanopowders were fabricated by nitrogen plasma-molten Al reaction.
     首先,用含氮等离子体电弧法制得 Al+AIN 混合纳米粉。
短句来源
     On the Heat Conduction Problems and a Design Principle for Plasma Arc Furnace
     等离子体电弧炉中的传热问题和一个设计原则
短句来源
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  相似匹配句对
     Arc Plasma and Its Applications
     电弧等离子体及其应用
短句来源
     The Powdered Boron Nitride Production in Arc Plasma
     电弧等离子体制备粉状氮化硼
短句来源
     PLASMA ECHO
     等离子体回波
短句来源
     Dusty plasmas
     尘埃等离子体
短句来源
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  plasma arc
In order to figure out the characteristics of plasma arc beam and mould in the PLDM process of high temperature alloy, the high speed CCD camera is used to obtain the picture around the plasma arc.
      
And the effect of laser parameter, such as average power, pulse width, pulse repetition frequency and the angle between laser beam and plasma arc beam on the plasma arc appearance, is studied experimentally.
      
The results show that the modality of plasma arc beam is markedly influenced by laser beam.
      
On the heat conduction problem and a design principle for plasma arc furnace
      
In this paper a plane heat conduction problem with variable coefficients of heat conductivity K(T) is analysed with given electric power supplied to the plasma arc.
      
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This paper describes a method of determination of the temperature distribution of an arc plasma. This method is able to evaluate the axisymme-tric emission coefficient and temperature field from radiation intensity measuremen-ts which can be realized by use of photographic detection. This method is called"off-axis peak intensity of emitting spectral line" or lorentz method. The Argonplasma used in our experiments at 170 ampere, 60 volt can be reasonablely assu-med as in local thermodynamic equilibrium, optically...

This paper describes a method of determination of the temperature distribution of an arc plasma. This method is able to evaluate the axisymme-tric emission coefficient and temperature field from radiation intensity measuremen-ts which can be realized by use of photographic detection. This method is called"off-axis peak intensity of emitting spectral line" or lorentz method. The Argonplasma used in our experiments at 170 ampere, 60 volt can be reasonablely assu-med as in local thermodynamic equilibrium, optically thin and axisymmetric. Underthese conditions the measured radiation intensity is consequently the integrated con-tribution of all the emission along the path as the emitted energy travels throughthe arc without attenuation. The emission coefficient is expanded in terms of a fi-nite number of Fouries Series. Integral equation relating the emission coefficientto the emitted spectral intensity is used to determine the unknown expansion co-efficients. As a result the radial temperature distributn of the arc plasma has beendetermined by a comparison between relative peak emission coefficient S (r)/S(r~*) and S (T)/S (T~*). The advantage of this method lies in the fact that onlyone spectral line intensity has to be measured in instead of two spectra line intn-sity in relative spectral line intensity method. In our practice ArI 4510 and ArI6965 are chosen for intensity measurements and the results of these two measure-ments are in quite good agreement with each other. Since in our measurements it isunnecessary to use the spontaneous transition probabilites, which is usually measur-ed in great error, the accuracy of this method is better than that of the relativespectral line intensity method. However, the temperature measured by this methodhas a lower temperature limit, for argon arc plasma the core temperature must behigher than the normal temperature of argon atomic spectral line (about 15×10~2K). In principle the upper temperatiure limit of this method is up to the completeionzation temperature.

用离轴峰值法测定等离子体电弧中的温度分布,只需测定一条谱线的归一化发射系数分布。在较高的温度下,测量精度优于谱线相对强度法。此法应用时有一定的温度下限,对于氩等离子体电弧,其中心最高温度必须超过氩原子谱线的正态温度(约15×10~3K)。实验测得了氩等离子体电弧的径向温度分布。以ArI4510,ArI6965谱线分别测得的温度分布基本吻合。

In this paper a plane heat conduction problem with variable coefficient of heat conductivity K(T) is analysed with given electric power supplied to the plasma arc. The governing equation for unknown temperature distribution is a nonlinear one with a δ function as its nonhomogenious term. To make the problem attractable by the method of separation of variables, a set of transformation of governing equation is introduced. An explicit simple formula is found for the efficiency of the furnace η. η depends linearly...

In this paper a plane heat conduction problem with variable coefficient of heat conductivity K(T) is analysed with given electric power supplied to the plasma arc. The governing equation for unknown temperature distribution is a nonlinear one with a δ function as its nonhomogenious term. To make the problem attractable by the method of separation of variables, a set of transformation of governing equation is introduced. An explicit simple formula is found for the efficiency of the furnace η. η depends linearly on r0, the nondimensional distance between the arc and surface of melted material, as well as on another nondimensional quantity Q, we described the above in detail in the paper. This relationship holds for r0<0.4, and gives a good guidance for the design of furnace.

本文在供给电弧能量一定的条件下,建立了等离子体电弧炉二维传热模型,其传热系数可以随温度而变化。经过一些函数变换并采用分离变量法,给出了气体热流势和等离子体电弧炉传热效率η的分析表达式。最后本文还给出了传热效率η关于电弧与熔炼物间无量纲距离r_0和另一个无量纲量l/Q(以下详细说明)的简单的线性关系,它提供了一个电弧设计原则。

Based on approximate similarity theory, arc plasma equa- tions are analyzed. Dimensionless generalized voltage-current characteris- tic which represents correlation of vortex-stabilized plasma arcs is ob- tained, and is verified with experiment data of arc air heater in the mag- nitude of 100 kW. When radiation is neglected, and dimensionless ge- neralized characteristic proposed in this article is compared with the results of , Shashkov and Yasko et al., good agreement is found. The functional expressions are...

Based on approximate similarity theory, arc plasma equa- tions are analyzed. Dimensionless generalized voltage-current characteris- tic which represents correlation of vortex-stabilized plasma arcs is ob- tained, and is verified with experiment data of arc air heater in the mag- nitude of 100 kW. When radiation is neglected, and dimensionless ge- neralized characteristic proposed in this article is compared with the results of , Shashkov and Yasko et al., good agreement is found. The functional expressions are basically reasonable.

本文采用近似相似理论对电弧等离子体方程进行分析,获得反映旋流稳定等离子体电弧的相关性的无因次广义伏安特性,并用100kW 级的空气电弧加热器的实验数据进行验证,在忽略辐射影响的条件下,本文所得的无因次广义特性与Shashkov和Yasko等人的结果比较,趋势一致,函数关系式基本合理。

 
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