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starting oxidation temperature
相关语句
  起始氧化温度
     When ferromagnetism of the diamond is relatively strong, its starting oxidation temperature decreases, twin peaks appear in the differential thermal curve and compressive strength of the diamond reduces as well.
     当金刚石的铁磁性较强时,其起始氧化温度降低,差热分析出现双峰,且抗压强度也降低。
短句来源
     Then, combining the curves of DTA and the micrographs of SEM, we ascertained the starting oxidation temperature on DTA as the characteristic temperature of thermal stability.
     继而结合聚晶金刚石的DTA曲线和SEM照片,确定以DTA曲线的起始氧化温度作为其热穗定性的表征温度。
短句来源
     Combining the DTA curves and the SEM micrographs of PCD, we ascertained the starting oxidation temperature on DTA as the characteristic temperature of thermal stability.
     结合聚晶金刚石的差热曲线和SEM照片,确定以差热曲线的起始氧化温度作为其热稳定性的表征温度.
短句来源
  氧化起始温度
     The nickel powders were analyzed by X ray diffraction(XRD),X ray phosphate spectroscopy,and thermogravimetry(TG),showing single crystalline phase,purity>98% and starting oxidation temperature at 300°C in air.
     X射线衍射及X射线荧光光谱分析表明,所合成的超细镍粉为单一晶相,纯度超过98%。 热重分析显示超细镍粉在空气中的氧化起始温度为300°C,终止温度为600°C。
短句来源
  “starting oxidation temperature”译为未确定词的双语例句
     The starting oxidation temperature of copper powders prepared by hydrothermal method is about 210℃and average particle size is about 0.7μm.
     采用此参数可得到平均粒度为0.7μm,分布狭窄,开始氧化温度约为210℃的超细铜粉。
短句来源
     Hence, the chemical property of copper powders is more stable, and the starting oxidation temperature increased to 299℃.
     由差热分析可知,钝化处理过的铜粉开始氧化温度可达到299℃。
短句来源
  相似匹配句对
     Starting with B.B.O.
     本文从B.B.O.
短句来源
     Oxidation of porphyrinogen
     卟啉原氧化
短句来源
     internal oxidation
     内氧化
短句来源
     Starting from Technology
     从技术出发
短句来源
     The oxidation-starting temperature of the material in flowing oxygen is about 650℃.
     材料在流动氧气中的起始氧化温度约为650℃;
短句来源
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The impurities and inclusions in synthetic diamonds, grown with catalyst Ni_(70)Mn_(25)Co_5, have been determined and analysed by the following methods in this study: spectral semiquantitative analysis, atomic absorpsion spectral analysis, chemical analysis, scanning electron microscope analysis, X-ray diffraction analysis, differential thermal analysis and so on. The results obtained are as follows: Amounts of elements Be, P, Pb, U, Ga, Sn, V, Zr, Ag, Y, Sr, Ba, Bi,Sb,Cd, W and In in diamonds are under the...

The impurities and inclusions in synthetic diamonds, grown with catalyst Ni_(70)Mn_(25)Co_5, have been determined and analysed by the following methods in this study: spectral semiquantitative analysis, atomic absorpsion spectral analysis, chemical analysis, scanning electron microscope analysis, X-ray diffraction analysis, differential thermal analysis and so on. The results obtained are as follows: Amounts of elements Be, P, Pb, U, Ga, Sn, V, Zr, Ag, Y, Sr, Ba, Bi,Sb,Cd, W and In in diamonds are under the detection limits of spectral analysis. Various atoms dissolved in the melting catalyst can be bond with carbon atoms on the surface of the growing diamond. Al and Si seem to incorporate with diamond more easily than Ni and Co when the growth rate of the crystal is low. Ni and Co are more easily to incorporate with diamond when the growth rate of the crystal is high(for example, when the linear growth rate is 1μm/s)and a large quantity of mother solution are included. The chemical compositions of different inclusions may be different. As Al and Si are more, Ni and Co will he less, while Ni and Co are more, Al and Si will be less. The atoms of impurities usually segragate along plane{110} to form inclusions.The distances between the planes of the inclusions preliminary determined are, 2.12(?), 1.8(?), 1.80(?) and 1.044(?). When ferromagnetism of the diamond is relatively strong, its starting oxidation temperature decreases, twin peaks appear in the differential thermal curve and compressive strength of the diamond reduces as well.

对以Ni_(70)Mn_(25)Co_5作触媒所生长的金刚石中的杂质和包体进行了光谱半定量分析、原子吸收光谱分析、化学分析、扫描电镜分析、X射线分析和差热分析。测试结果表明:Be、P、Pb、u、Ga、Sn、V、Zr、Ag、Y、Sr、Ba、Bi、Sb、Cd、W和In等元素在金刚石中的含量均在光谱分析的检测限以下。溶解在熔融触媒中的各种原子,均可能与正在生长着的金刚石表面碳原子成键。当晶体生长不太快时,Al和Si似乎比Ni和Co更易于进入金刚石。当晶体生长过快时(例如线生长速度为1μm/s),大量的母液被捕获,Ni和Co则易于进入晶体。不同包体的化学成分可能不同,Al和Si多时,Ni和Co少,反之,Ni和Co多时,Al和Si少。杂质原子常沿{110}面偏析而形成包体。初步确定这些包体的晶面间距为2.126(?)、1.84(?)、1.80(?)和1.044(?)。当金刚石的铁磁性较强时,其起始氧化温度降低,差热分析出现双峰,且抗压强度也降低。

The ultrafine nickel powder with mean particle size 0.1~0.5μm was prepared by chemical reduction under the protection of gelatin in aqueous solution.The main affective factors,such as reaction time,the concentration of hydrazine hydrate,gelatin,sodium carbonate and silver nitride,on the reduction inducing time,the yield and morphology of nickel powders,were studied.The nickel powders were analyzed by X ray diffraction(XRD),X ray phosphate spectroscopy,and thermogravimetry(TG),showing single crystalline phase,purity>98%...

The ultrafine nickel powder with mean particle size 0.1~0.5μm was prepared by chemical reduction under the protection of gelatin in aqueous solution.The main affective factors,such as reaction time,the concentration of hydrazine hydrate,gelatin,sodium carbonate and silver nitride,on the reduction inducing time,the yield and morphology of nickel powders,were studied.The nickel powders were analyzed by X ray diffraction(XRD),X ray phosphate spectroscopy,and thermogravimetry(TG),showing single crystalline phase,purity>98% and starting oxidation temperature at 300°C in air.

以明胶为高分子保护剂,水合肼为还原剂,在水溶液中制备了粒径为0.1~0.5μm、分散良好的类球形超细镍粉。研究了明胶保护条件下水合肼用量、碳酸钠浓度、反应时间、明胶浓度、硝酸银加入量对镍粉的产率、形态及反应诱导期的影响。X射线衍射及X射线荧光光谱分析表明,所合成的超细镍粉为单一晶相,纯度超过98%。热重分析显示超细镍粉在空气中的氧化起始温度为300°C,终止温度为600°C。

The aging of stator insulation of large generators has great relation with appearance and development of micro defects inside the insulation ,and deterioration of epoxy. In this paper, Thermogravimetry (TG) and Differential Scanning Calorimeter (DSC) analysis are applied to the study on the aging of stator insulation of large generators. The results show that, compared with that of the sound parts, epoxy content and starting oxidation temperature of the defective parts presented much more remarkable changes...

The aging of stator insulation of large generators has great relation with appearance and development of micro defects inside the insulation ,and deterioration of epoxy. In this paper, Thermogravimetry (TG) and Differential Scanning Calorimeter (DSC) analysis are applied to the study on the aging of stator insulation of large generators. The results show that, compared with that of the sound parts, epoxy content and starting oxidation temperature of the defective parts presented much more remarkable changes in its physical and chemical performance. In detail, its content and starting-temperature of oxidation decreased obviously; furthermore, its decomposition-activation energy DE of epoxy in the defective parts increased evidently. It is considered that the aging of epoxy caused by multi-stresses is the main reason for the generation and development of defects and the final aging of the main insulation structure of large generators.

大型发电机主绝缘老化与主绝缘内部微观缺陷的产生和发展以及环氧劣化有着极为密切的关系,该文对大型发电机主绝缘进行了热重分析和差示扫描量热分析研究。实验结果表明:与完好部位相比,缺陷部位的环氧含量以及环氧的氧化起始温度明显降低;而且,缺陷部位环氧的裂解活化能 DE显著增大。分析认为,多应力作用下环氧的老化是缺陷得以产生和发展并最终导致大电机主绝缘结构老化的重要原因。

 
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