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diffusion of
相关语句
  扩散
    DIFFUSION OF Zn, Cd, Sr, Pb,Ba DIVALENT CATIONS IN SILICATE GLASSES
    硅酸盐玻璃中Zn、Cd、Sr、Pb、Ba二价离子的扩散
短句来源
    Empirical Rule of Diffusion of Low Carbon n-Alkanes in Molecular Sieves
    低碳烷烃分子在分子筛中扩散的经验规律
短句来源
    Study on the Diffusion of Zr, Ti and Co in the Industrial Enamel Consisting of Two Different Glazes
    工业搪瓷双元组合面釉中锆、钛和钴的扩散研究
短句来源
    Adsorption and Diffusion of Oxygen and Nitrogen in Carbon Molecular Sieve
    氧和氮在炭分子筛上的吸附与扩散
短句来源
    The Diffusion of Element Cu in Bronze Powder Corrosion──The Key Action of CuCl
    青铜生锈过程中铜元素的扩散──CuCl的作用
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  中扩散
    Empirical Rule of Diffusion of Low Carbon n-Alkanes in Molecular Sieves
    低碳烷烃分子在分子筛中扩散的经验规律
短句来源
    As well known, the body fluid and blood are typical non-Newtonian fluid, so it is very important to investigate the diffusion of the nutritious molecules in non-Newtonian fluid for controlling the diffused process and helping the clinical treatment.
    生物体液、血液均为非牛顿流体,研究营养类分子在非牛顿流体中扩散,对控制扩散过程、指导临床治疗具有实际意义。
短句来源
    Diffusion of metals in Hg satisfactorily obeys the Einstein—Sutherland equation (n-4) where the 'effective radii' of diffusing particles should be used instead of the atomic radii.
    指出金属在汞中的扩散完全符合Einstetin—Sutherland公式,式中扩散质点的半径应为金属传质的有效半径。
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  “diffusion of”译为未确定词的双语例句
    Studing Thermal Diffusion of Coating Ion in SrTiO_3MuIti-Function Ceramics
    SrTiO_3多功能陶瓷的涂覆离子热扩散研究
短句来源
    The activation energy for the reaction was determined as much as 282.4±37.2, 296.8±10.1 and 266.1±41.0kJ/mol respectively. It was proposed that the rate-determined step was the diffusion of cations through layers of the reaction product.
    用Jander、Dunwald-Wagner和Ginstling-Brounshtein模型拟合,所得到的表观活化能分别为282.4±37.2,296.8±10.1和266.1±41.0kJ/mol。
    Experimental Methodology for Study Diffusion of Leaked Hazardous Gas
    危险气体泄漏扩散的实验方法研究
短句来源
    Investigation of kinetics associated with Si_3N_4/Ti/Cu/Ti/Si_3N_4 PTLP bonding process demonstrated that the growth of interface reaction layer obeyed the parabola law governed by the diffusion of participating elements.
    采用Ti/Cu/Ni/Cu/Ti中间层对Si_3N_4陶瓷进行二次PTLP连接,界面微观结构为Si_3N_4/反应层/Cu-Ni固溶体层(少量的Cu-Ni-Ti)/Ni;
短句来源
    The result shows that in the process of α-FeOOH decomposing to a-Fe2O3,the formed micropore gradually disappeares via a surface diffusion of the crystal nucleus within particles against the temperature increasing.
    结果表明,在α-FeOOH分解成a-Fe2O3的过程中,随着温度升高,产生的孔洞通过颗粒内部的晶核表面扩散的烧结机制逐渐消失。
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  diffusion of
One DR peak associated with the short-distance diffusion of oxygen vacancies was observed in both temperature and frequency spectra.
      
The method of NMR spin echo with the magnetic field pulse gradient was used for studying self-diffusion of water molecules in the radial root direction.
      
Diffusion of an Organic Cation into Root Cell Walls
      
Nonspecific pore-forming proteins (porins) are the major proteins of the outer membrane of Gram-negative bacteria responsible for diffusion of low-molecular-weight compounds.
      
Furthermore, these inhibitors not only reduce the local tissue damage but also retard the easy diffusion of systemic toxins and hence increase survival time.
      
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An elastic creep and stress relaxation of 99.96. polycrystalline copper have been inverstigated in the temperature range of 135-380- The activation energy associated with the creep was found to be 25>000-2000 calories per mole. It is much smaller than the activation energy for the volume self-diffution and is close to the activation energy for the grain boundary self-diffusion of copper. The mechanism of anelastic creep of polycrystalline copper at higher temperatures may thus be considered to be similar...

An elastic creep and stress relaxation of 99.96. polycrystalline copper have been inverstigated in the temperature range of 135-380- The activation energy associated with the creep was found to be 25>000-2000 calories per mole. It is much smaller than the activation energy for the volume self-diffution and is close to the activation energy for the grain boundary self-diffusion of copper. The mechanism of anelastic creep of polycrystalline copper at higher temperatures may thus be considered to be similar to the mechanism of grain boundary self-diffusion.

根据葛庭燧设计的扭转微蠕变装置,用99.96%多晶纯铜从135—380℃作滞弹性蠕变及应力弛豫试验。所测得蠕变激活能为25±2千卡/克分子,约为纯铜体积自扩散激活能的一半,与其晶粒间界自扩散激活能相接近。因此,可以认为多晶纯铜在较高温度下的滞弹性蠕变机构与晶粒间界自扩散机构相似。

The phase transformation of alumina at high temperature is rather complex, itis a problem that has attracted quite extensive attention in recent years. However,investigation concerning its kinetics is still rather scarce. The purpose of this paperis to study the kinetics of phase transformation of alumina by determining the chan-ge of specific gravity with time under isothermal heat treatment. The specimen,containing approximately 2% TiO_2 as additive, has been prepared by flamespraying. Itis composed essentially...

The phase transformation of alumina at high temperature is rather complex, itis a problem that has attracted quite extensive attention in recent years. However,investigation concerning its kinetics is still rather scarce. The purpose of this paperis to study the kinetics of phase transformation of alumina by determining the chan-ge of specific gravity with time under isothermal heat treatment. The specimen,containing approximately 2% TiO_2 as additive, has been prepared by flamespraying. Itis composed essentially of γ-Al_2O_3, with a minor inclusion of α-Al_2O_3 (5-8%). X-raydifraction analysis verified that the sequence of transformation of this α-Al_2O_3 is asfollows: γ-Al_2O_3→δ-Al_2O_3→α-Al_2O_3, with the latter step as the slower process. Themechanism of phase transformation has been dicussed and it is hypothesized that therate of transformation of δ-Al_2O_3 to α-Al_2O_3 is governed by the area of interfacedeveloped, which can be expressed as dy/dt=k(1-y)y~(2/3)where y is the fraction of α-Al_2O_3 in the specimen, t is time, and k is the specificreaction-rate constant. The experimental results confirm the validity of the aforemen-tioned expression, from which the values of k between the interval 1098-1190℃ havebeen calculated. The specific reaction-rate constant k, and temperature follow theordinary Arrhenius relationship, and can be represented as the following formula: k=Aexp(-153, 000/RT)The activation energy, 153 Kcal/mole, can be explained as that required for thegrowth of α-Al_2O_3 in δ-Al_2O_3, with the volume diffusion of aluminum ion as thepossible rate-determining factor. The experimental results obtained by Clark and Whitehave also been discussed in this paper, with possible explanations being put forward.

氧化铝在高温下的相变历程相当复杂,是近年来研究得较多的一个问题,但是对相变动力学却还很少涉及。本文从测定试样在恒温处理过程中的比重变化,研究了氧化铝的相变动力学。试样用火焰雾化法淬冷制得,含有约 2%TiO_2作为添加物,它的主要相组成是γ-Al_2O_3,并含有5~8%的a-Al_2O_3。X-射线分析证实这种α-Al_2O_3的相变历程是:γ-Al_2O_3→δ-Al_2O_3→α-Al_2O_3,其中δ→α-是较慢的过程。文中讨论了相变的机构,并假设从δ-Al_2O_3至α-Al_2O_3的相变速度决定于相界面面积,可用下式表示之: dy/dt=k(1-y)y~(2/3)式中y是试样中α-Al_2O_3的分数,t是时间,k是比速度常数。实验结果证实上式是适用的,从而计算了在1098~1190℃范围内的k值,并求得比速度常数k和温度的关系是:k=Aexp(-153,000/RT)。153千卡/克分子的能量应看作是α-Al_2O_3在δ-Al_2O_3母相中的生长活化能,而铝离子的体积扩散可能是过程的控制因素。文中还讨论了Clark和 White的实验结果,并提出了可能的解释。

Twenty eight samples of lead oxide glaze, calcium oxide glaze and red glaze from Hanto Qing Dynasties were studied and their softening points were determined. It can beasserted that the "Qing Hua" (underglaze blue) not only coloured the surrounding glazebut also preferably stained the anorthite crystalline at the site to deep blue. On heatingthe "Qing Hua", redissolvation of the anorthite crystals caused slight diffusion of the bluecolour. After cooling, anorthite recrystallized and aggregated on the surrounding...

Twenty eight samples of lead oxide glaze, calcium oxide glaze and red glaze from Hanto Qing Dynasties were studied and their softening points were determined. It can beasserted that the "Qing Hua" (underglaze blue) not only coloured the surrounding glazebut also preferably stained the anorthite crystalline at the site to deep blue. On heatingthe "Qing Hua", redissolvation of the anorthite crystals caused slight diffusion of the bluecolour. After cooling, anorthite recrystallized and aggregated on the surrounding undissol-ved blue pigment. The prismatic anorthite crystallines in Ge Yao type glaze excavatedfrom the Great Capital of Yuan Dynasty were very liable to redissolve after being heated,and it required longer period of time and particular technioue to recrystallize them. Thephysico-chemical characteristics of the celadon glaze predetermined that the glaze couldhardly occurred into emulsion form.

研究了自汉至清各朝28个试样的铅釉、石灰釉、红釉的受热行为。测定了它们的软化点。证实釉下青花色料除了使周围的玻璃体着色外,更加择优地使该处的钙长石晶体染成深兰色。青花受热后钙长石回溶使兰色稍有扩散。冷却后钙长石在未溶色料周围再度聚集析晶,元大都出土的哥窑型釉中的钙长石柱状雏晶受热后极易回溶,要它重新析晶需要较长时间保温的特定工艺。青瓷釉因其物理化学本性决定了它难以产生乳浊现象。

 
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