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high specific area
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  高比表面积
    The activated carbon with high specific area of (2?170) m~2/g was prepared from petroleum coke by KOH-activation, which can be used as electrode materials for electric double-layer capacitor. Its good electrochemical performance was determined by means of DC charge/discharge, cyclic voltammetry and AC impedance analysis.
    以石油焦为原料,采用KOH活化法制备比表面积为2170m2/g的高比表面积活性炭,采用该材料作为电极材料,组装成超级电容器,并对它进行了恒电流充放电实验、循环伏安实验和交流阻抗等实验,结果表明,制备的活性炭作电极材料组装的电容器具有良好的电化学性能.
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  高比表面
    Preparation and application of high specific area silicon carbide
    高比表面碳化硅的制备与应用
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  高比表面
    Preparation and application of high specific area silicon carbide
    高比表面碳化硅的制备与应用
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    The results showed that Ce0.35Zr0.55La0.10O1.95 had a cubic structure similar to Ce0.50Zr0.50O2 and high specific area after calcined at 600 ℃ for 5 h.
    XRD和BET的结果表明,经600℃焙烧5h后,Ce0.35Zr0.55La0.10O1.95具有与Ce0.50Zr0.50O2相似的立方结构和高的比表面积;
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    The results indicated as follows: the specimens have high specific area, up to 681.5 m2/g at 10TiSi. Ti-Si composite materials are mixed at atomic scale, and Ti-O-Si bond appears in all of the samples with different TiO2 content;
    结果表明:制得的Ti-Si复合氧化物具有很高的比表面积,在TiO_2含量为10%时达到681.5m~2/g,Ti原子进入Si-O四面体结构中,形成Si-O-Ti键,复合氧化物的稳定性好,当TiO_2含量低于60 wt%时,以无定型形式存在;
短句来源
    (2) The acetylene black particle with high specific area was used to prepare the acetylene black electrode.
    (2)采用具有较大比表面积的乙炔黑作为电极的基体材料,制备乙炔黑电极。
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    the MCM-41 had a typical hexagonal structure, and a very high specific surface area; Al-MCM-41 got from AlCl3 grafting kept the high crystallinity and high specific area, and got some acidity;
    纯硅MCM-41具有典型的六方结构,具有很高的比表面积,接枝改性获得的Al-MCM-41能够保持较好的规整性和很高的比表面积,同时获得了一定的酸性;
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    he cathodic reduction of oxygen is studied on Pt--Fe-Co alloy distributed in the form of small particles on carbon black with a high specific area. Comparing with Pt/C catalyst, the catalytic activity and stability of Pt--Fe--Co/C catalysts are greatly enhanced for O, reduction. The cathodic polarization of O, reduction on Pt--Fe--Co/C is 20 to 40 mV below the conventional catalyst Pt/C.
    氧在Pt-Fe-Co/C合金催化剂上的还原魏子栋,郭鹤桐,唐致远(山东工业大学化工系,济南250014)(天津大学应用化学系,天津300072)关键词燃料电池,铂-铁-钴催化剂,电化学催化,氧还原尽管评价燃料电池运行效率的指标很多,但其中最重要的是阴.
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  high specific area
These sphere shells are promising candidates for hydrodesulphurization catalyst due to their high specific area and chemical resistance to sulfur.
      
New alternatives for high specific area γ-Al2O3 synthesis
      
HILDA is also used to follow the changes in the adsorptive energy distribution that occur with annealing a high specific area sodium chloride sample.
      
Interfacial phenomena were assumed to be noticeable owing to the high specific area of this filler.
      
A nano-alumina with high specific area was prepared using a homogeneous precipitation method with titanium dioxide and barium oxide as modifying additives.
      
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he cathodic reduction of oxygen is studied on Pt--Fe-Co alloy distributed in the form of small particles on carbon black with a high specific area. Comparing with Pt/C catalyst, the catalytic activity and stability of Pt--Fe--Co/C catalysts are greatly enhanced for O, reduction.The cathodic polarization of O, reduction on Pt--Fe--Co/C is 20 to 40 mV below the conventional catalyst Pt/C. The retention of specific surfacearea of Pt on Pt-Fe--Co/C is 20% higher than on Pt/C after...

he cathodic reduction of oxygen is studied on Pt--Fe-Co alloy distributed in the form of small particles on carbon black with a high specific area. Comparing with Pt/C catalyst, the catalytic activity and stability of Pt--Fe--Co/C catalysts are greatly enhanced for O, reduction.The cathodic polarization of O, reduction on Pt--Fe--Co/C is 20 to 40 mV below the conventional catalyst Pt/C. The retention of specific surfacearea of Pt on Pt-Fe--Co/C is 20% higher than on Pt/C after an accelerated aging test. The anchoring of Pt on carbon surface by Fe and Co is thought to play a main role for the improvement of Pt--Fe--Co/C performance.

氧在Pt-Fe-Co/C合金催化剂上的还原魏子栋,郭鹤桐,唐致远(山东工业大学化工系,济南250014)(天津大学应用化学系,天津300072)关键词燃料电池,铂-铁-钴催化剂,电化学催化,氧还原尽管评价燃料电池运行效率的指标很多,但其中最重要的是阴...

High specific area dimolybdenum nitride(up to 140 m2/g) has been synthesized by temperatureprogrammed topotactic reaction between MoO3 and NH3.The synthetic conditions of high surface area Mo nitride(usually,SBET>100 m2/g) were quite difficult and the amount of starting material MoO3 in each batch was much less than one gram.However,some synthetic conditions have been greatly improved in our experimets.Heating rate of the reaction segment was increased from the original 0.6 K/min to 1 K/min.Space...

High specific area dimolybdenum nitride(up to 140 m2/g) has been synthesized by temperatureprogrammed topotactic reaction between MoO3 and NH3.The synthetic conditions of high surface area Mo nitride(usually,SBET>100 m2/g) were quite difficult and the amount of starting material MoO3 in each batch was much less than one gram.However,some synthetic conditions have been greatly improved in our experimets.Heating rate of the reaction segment was increased from the original 0.6 K/min to 1 K/min.Space velocity of NH3 was only one-tenth of that in the reported methods and the amount of precursor MoO3 approached 3 grams.It was revealed that space velocity of ammonia,elevated temperature rate and particle size of MoO3 were very important for producing high surfaceγ-Mo2N.The XRD result indicated that(200) plane of high surface area γ-Mo2N was more intense than that of low surface area γ-Mo2N.The intensities ratio of(200)/(111) was larger than 2.4 for the highest surface area γ-Mo2N(Mo2N-1).There was a regular change between surface area and pore diameter distribution.The percentage of micropore volume in the range of 2-3 nm was graduallyincreased with increasing of surface area.At the same time, the nitriding process of MoO3 was studied and it was found that MoO3 was essentially transformed into γ-Mo2N at 773 K.This temperature for the synthesis of high surface area γ-Mo2N was 200 K lower than that reported in the literature.

通过程序升温控制的MoO3与NH3的Topotactic反应,合成出钝化后比表面达140m2/g的γ-Mo2N。研究发现NH3空速、升温速率、前身态MoO3粒度等对高比表面γ-Mo2N的形成影响很大。γ-Mo2N的比表面与孔径分布呈一定的规律性变化。XRD测试结果表明高比表面γ-Mo2N与低比表面γ-Mo2N的衍射峰强度有很大差异。同时文中对MoO3的氮化过程进行了探讨,结果表明MoO3在773K时已生成高比表面的γ-Mo2N,比文献报道的合成温度低200K左右.

Cu Mn methyl formate synthesis catalysts have been prepared with phase transfer using lauric acid as a surfactant.The results indicate that the thus catalysts obtained have smaller particles size and higher specific area than the one by coprecipitation and impregnation.Moreover,the reaction activity of the one step synthesis of methyl formate directly from synthesis gas is obviously higher than those by coprecipitation and impregnation.

采用月桂酸作表面活性剂相转移制备了 Cu-Mn合成甲酸甲酯催化剂 ,结果发现相转移法制得的催化剂粒径比采用共沉淀法要小得多 ,已经达到了纳米超细粒子水平。同时 ,比表面积也显著增大 ,用于由合成气一步法合成甲酸甲酯的活性显著高于共沉淀法及浸渍法制得的催化剂。

 
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