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high specific surface
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  高比表面
     Preparation and Characterization of High Specific Surface Area Ce_xZr_(1-x)O_2 Mixed Oxide
     高比表面Ce_xZr_(1-x)O_2复合氧化物的制备及表征
短句来源
     Synthesis and Characterization of Titania-pillared Layered HLaNb_2O_7 with High Specific Surface Area
     高比表面TiO_2柱层状HLaNb_2O_7的制备和表征
短句来源
     TiO_2 Photocatalyst with High Specific Surface Area: Preparation and Hydrogen Evolution Performance
     高比表面TiO_2光催化剂的制备及产氢性能研究
短句来源
     The results showed that mesoporous TiO2 with high specific surface are prepared by this method, its average pore radius is 4-7 nm;
     结果表明:用该方法能制得高比表面的介孔TiO2,其平均孔径在4-7nm之间;
短句来源
     Ni was dispersed on γ-Al2O3 with large pore volume and high specific surface area by using wet impregnation method.
     制备了负载于大孔容、高比表面的γ-Al2O3载体上的Ni基催化剂.
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  高比表面积
     High Specific Surface of Ce_(0.7)Zr_(0.3)O_2 Solid Solution Nanostructure by Templated Assemble
     高比表面积纳米结构Ce_(0.7)Zr_(0.3)O_2固溶体的模板组装
短句来源
     Magnetic Fe_3O_4 Nanopowder with High Specific Surface Area Prepared by Inverse Phase Method
     转相法制备高比表面积纳米Fe_3O_4磁性粉体
短句来源
     To improve the high-rate charge-discharge capability of Ni/MH power batteries,the nickel foam electrodeposited Co-Ce alloy with spicular structure and high specific surface was used as the substrate of nickel electrode,the content of Ce was 0.19%.
     为了提高动力MH/Ni电池的高倍率充放电性能,在泡沫镍骨架表面电沉积具有针状结构、高比表面积的Co Ce合金,Ce含量为0 19%,用其作镍电极的基板。
短句来源
     A Study On Preparation of High Specific Surface Area Manganous Manganic Oxide(Mn_3O_4)
     高比表面积Mn_3O_4制备研究
短句来源
     First, by using ethanol as solvent, two groups of Ce-Zr-Ln (Ln=La, Y, Yb, Gd, Sm, Pr, Dy, Nd) solid solutions with high specific surface areas were prepared by sol-gel method at 600℃ and 900℃respectively.
     首先采用改进的溶胶-凝胶法并以乙醇作溶剂分别在600℃和900℃制备出2组高比表面积的Ce-Zr-Ln(Ln=La、Y、Yb、Gd、Sm、Pr、Dy、Nd)固溶体。
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  高比表面的
     Ni was dispersed on γ-Al2O3 with large pore volume and high specific surface area by using wet impregnation method.
     制备了负载于大孔容、高比表面的γ-Al2O3载体上的Ni基催化剂.
短句来源
     The results showed that mesoporous TiO2 with high specific surface are prepared by this method, its average pore radius is 4-7 nm;
     结果表明:用该方法能制得高比表面的介孔TiO2,其平均孔径在4-7nm之间;
短句来源
     Therefore, incorporating HPA into Porous materials effectively will be of fundamental and practical significance. In this paper, via dipping technique, PWA was immobilized into the supporter SiO_2 with high specific surface, which is prepared by sol-gel method, and then they were characterized by FT - IR, XRD, BET, TG-DSC and UV-Vis DRS.
     论文拟采用溶胶.凝胶法合成高比表面的SiO_2作为催化剂载体,用浸渍法制备固载化磷钨酸催化剂,并用XRD、FT-IR、BET、XRF、TG-DSC、UV-Vis、DRS等手段对其理化性能进行表征;
短句来源
     High specific surface molybdenum(tungsten)nitride(carbide)used as a new type catalystic material due to its high activity in the catalystic hydrogenation and dehydrogenation reaction are highly evaluated.
     高比表面的氮化钼(钨)和碳化钼(钨)在催化加氢脱氢反应中表现出高的活性,成为催化领域中一种新型催化材料而受到重视。
短句来源
     The photocatalytic reactivity of nanostructured TiO_2 fiber with high specific surface area in phenol system has been investigated. The results show that TiO_2 fiber has good photocatalysis properties equivalent to P25.Because the morphology of the nanoporous particles in the micrometer-size range is favorable for separation,TiO_2 fiber is a good candidate for the application of industry.
     研究了具有纳米结构,高比表面的锐钛矿TiO2纤维在光催化降解苯酚体系中的氧化性能,发现其活性与P25相当; 通过加羟基自由基猝灭剂证实了羟基自由基(HO.)
短句来源
  “high specific surface”译为未确定词的双语例句
     Both fresh and aged Co3O4/ YSZ-Al2O3 and Co3O4/ YSZ-Al2O3+OSM remain high specific surface area .
     用YSZ-Al2O3和YSZ-Al2O3+OSM为载体的8wt.%Co3O4甲烷燃烧催化剂,老化后保持较大的比表面,分别为112.3m2/g和100.2m2/g,;
短句来源
     The Phases of ZrO_2 Al_2O_3 Composites with High Specific Surface Prepared by Co precipitation
     共沉淀法制备ZrO_2-Al_2O_3纳米复合氧化物的物相表征
短句来源
     The results show a high specific surface area of 116.8 m~(2)/g and total pore volume of 0.30 cm~(3)/g after calcining at 873 K for 4 h,and after aging at 1 273 K for 10 h,the specific surface area and total pore volume of 68.1 m~(2)/g and 0.22 cm~(3)/g were maintained.
     结果表明,该材料经873 K焙烧4 h后比表面积达到116.8 m2/g,孔容达到0.30 cm3/g,经1 273 K老化10 h后,比表面积和孔容仍然保持在68.1 m2/g和0.22 cm3/g.
短句来源
     Nanoscale particles possessed rather high specific surface area and surface reactivity and that the specific surface area of the prepared nanoscale Pd/Fe bimetal BET reached 12.4m2/g, while the commercially available Fe particle (<10m) had only the specific surface area 0.49m2/g.
     结果表明,纳米颗粒具有较高的比表面积和表面反应活性,所制备的纳米Pd/Fe双金属BET比表面积达到12.4m2/g,而商用铁颗粒(<10m)的比表面积只有0.49m2/g;
短句来源
     SYNTHESIS CONDITIONS OF CATALYST γ-Mo_2N WITH HIGH SPECIFIC SURFACE AREA
     大比表面积γ-Mo_2N催化剂合成条件的考察
短句来源
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  high specific surface
Study on catalyst carrier nano-α-alumina with high specific surface area
      
The central point in this technique is the quantitative interpretation of data, especially, for substances with a high specific surface area.
      
In porous electrodes with an immobilized enzyme the substrate must have a high specific surface area, which must be accessible to landing onto it a maximum number of enzyme molecules.
      
The use of membrane filters allows one to obtain amorphous silica with a reduced impurity content and a high specific surface area, as well as an aqueous hydrosol of colloidal silica.
      
This paper describes a simple synthetic route for the synthesis of hexagonal boron nitride (h-BN) powders with high specific surface area, in which BBr3, NH4Cl and Al powders are used as starting materials.
      
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The author's previous work indicated that the activity of granular fused iron catalysts decreased seriously with time due to the gradual plugging up of the pore volume of catalysts by the high boiling point products. In this paper, the activity data were treated with Wheeler's internal diffusion law mathematically. And the results suggest that the rate is a chemical controlling one in the initial period of the synthesis, and the coefficient of the catalysts surface is of 0.98 (with space velocity 1000 hr~(-1),...

The author's previous work indicated that the activity of granular fused iron catalysts decreased seriously with time due to the gradual plugging up of the pore volume of catalysts by the high boiling point products. In this paper, the activity data were treated with Wheeler's internal diffusion law mathematically. And the results suggest that the rate is a chemical controlling one in the initial period of the synthesis, and the coefficient of the catalysts surface is of 0.98 (with space velocity 1000 hr~(-1), CO conversion 90% or so). When the catalysts pore volume are plugged up by the high boiling point products (whether the pore to be micro or macro), the rate becomes an internal diffusion controlling one, and the effectiveness of the catalytic surface changed into 0.082. The calculated coefficient of diffusion is of 2.4 10~(-5) cm~2/sec, which is in agreement with the magnitude of liquid-phase diffusion. Under the diffusional controlling conditions, the activity level of catalysts depends upon Deff, ks and Sg, by the rate law k∝2~(1/Deff·ks·Sg.) Where change of effective diffusivity. Deff, under the liquid phase conditions is not essential. But both the specific reaction rate, ks, and the effective surface, Sg are the major factors to the catalytic activity improvements. Therefore the precipited iron catalysts, owing to its high specific surface area and high specific activity, may be the promising one of the granular catalysts suitable for the high space velocity synthesis.

已往的工作指出,顆粒熔鉄催化剂在合成过程中活性有随时間下降的現象,认为主要是由于腊液堵塞孔隙的关系,应用成型方法构成大孔,能够有利于腊液的流出,延緩了活性下降的时間,但当腊液堵滿孔隙时,活性下降的水平仍与未成型的顆粒催化剂相近。本文根据活性方面的数据,进行了宏观动力学的分析,由动力学計算再次指明:当腊液未堵塞孔隙吋,合成反应是化学反应控制,此时表面有效利用系数达0.98(空速1000,CO轉化90%以上)。而当腊液堵塞孔隙后,轉为液相扩散控制,对362-1大顆粒催化剂言,此时表面有效利用系数为0.082,并求得气体通过液柱的扩散系数为2.4×10~(-5)厘米~2/秒。在扩散控制的情况下,由动力学分析指明,能影响活性水平的主要是Deff、Ks、Sg。有效扩散系数Deff在液相扩散情况下的改变是不大的,增大孔径并不能提高扩散控制时的活性水平。因此,孔径的增大在合成烃情况下仅起延緩腊液的积聚作用,而不能提高終活性的水平。由动力学分析指出,沉淀剂由于有大的表面积(較熔鉄剂大数倍以至数十倍),因此,可能适用于高速固定床操作而不須进行再生。实驗也驗証了这个看法。

The crystallite dimensions of a new solvay type catalyst for propylene polymerization were determined from the data of breadth of X-ray diffraction lines at half peak intensity. The crystallites have the size of about 100 A and they are smaller then those prepared by other methods. Their catalytic activity increases linearly with decreasing crystallite size.Surface area and pore structure of the catalyst were determined by elution chro-matographic method on model ST-03 analyzer. Our results showed that such...

The crystallite dimensions of a new solvay type catalyst for propylene polymerization were determined from the data of breadth of X-ray diffraction lines at half peak intensity. The crystallites have the size of about 100 A and they are smaller then those prepared by other methods. Their catalytic activity increases linearly with decreasing crystallite size.Surface area and pore structure of the catalyst were determined by elution chro-matographic method on model ST-03 analyzer. Our results showed that such catalyst possess high specific surface area and large pore volume and has both large and fine pores. Therefore, active centres can be fully available.

用X射线衍射法测定了索尔维型丙烯聚合新催化剂的微晶粒大小为100A左右,比其它方法所制得的同类型催化剂微晶粒要小;并发现催化剂活性与微晶粒大小几乎成线性关系,微晶粒越小催化活性越高。 用ST-03型比表面、孔径分布测定仪研究了催化剂的孔结构。结果表明本催化剂具有较大的比表面和孔体积及粗细孔均备的优良孔结构,保证钛活性中心的充分利用,因而催化剂表现出较高的催化活性。

Titanium nickelide intermetallic compounds have been prepared by means of coprecipitation-reduction followed by diffusion processes, in order to obtain the cathodic material with improved hydrogen absorbing character.Titanium-nickel hydroxides are first precipited by NaOH from mixed solution of NiCl2 and TiCl4. After dehydration at 600℃, the mixed hydroxide is reduced by CaH2 to give hydrided TiNi and Ti2Ni.The coprecipitation-reduction and diffution process has been discussed in detail. The lattice parameters...

Titanium nickelide intermetallic compounds have been prepared by means of coprecipitation-reduction followed by diffusion processes, in order to obtain the cathodic material with improved hydrogen absorbing character.Titanium-nickel hydroxides are first precipited by NaOH from mixed solution of NiCl2 and TiCl4. After dehydration at 600℃, the mixed hydroxide is reduced by CaH2 to give hydrided TiNi and Ti2Ni.The coprecipitation-reduction and diffution process has been discussed in detail. The lattice parameters of TiNiH1.14 and TiNiH2.56 are 24.85A and 11.91A.The temperature-composition dissociation isobars at 1 atm. for the product and potential-time plots of TiNi and Ti2Ni electrodes have been drawn respectively. The discharge capacities were determined as 262.2 mAh/g for TiNiH1.14 and 169.9 mAh/g for Ti2NiH2.56.Since the product has higher specific surface and excellent electro-catalytic activity, electrodes made from the product have much important effect on decreasing the polarization and increasing the cycle life.

本文提出一种用共沉淀还原扩散法制备钛镍金属互化物的方法,详细讨论了共沉淀还原扩散过程,合成了比表面高、电催化活性良好的钛镍金属互化物。

 
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