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high specific area    
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  高比表面积
    Wollastonite reacts with hydrochloric to produce high specific area porous SiO 2 under the conditions of pH≤5,PEG and NH-4Cl as additive. The pH value is 4 after the reaction.
    硅灰石与盐酸反应合成高比表面积多孔SiO2 条件为pH值≤ 1.5 ,添加剂为聚乙二醇和NH4Cl,反应后体系中和到pH =4.0 ,经固液分离 ,烘干 ,6 5 0~ 75 0℃灼烧 2h得产物。
短句来源
    A series of Ni-Fe oxides with high specific area and Ce0.8Sm0.2O1.9(SDC) electrolyte were prepared using the nitrate-citric acid method. On the basis of Ni-Fe oxides and Ce0.8Sm0.2O1.9 electrolyte, Ni-Fe/SDC composite anode materials were prepared. Meanwhile, their microstructure and other performance-related parameters were also tested.
    采用硝酸盐-柠檬酸法合成了具有高比表面积的一系列Ni-Fe氧化物和电解质Ce0.8Sm0.2O1.9(SDC),利用上述材料制备出固体氧化物燃料电池(SOFC)复合阳极材料Ni-Fe/SDC,并对其微结构和相关性能进行测试.
短句来源
    Study of the Synthesis of High Specific Area Porous SiO_2 from Wollastonite and its Characteristics
    硅灰石合成高比表面积多孔二氧化硅及其表征
短句来源
    Development of Water TreatmentNano-modified CeramsitesFiller With High Specific Area
    纳米改性陶粒——高比表面积水处理填料的研制
短句来源
    Experimental study on metal gauze corrugated packing with high specific area
    高比表面积金属丝网波纹填料的实验研究
短句来源
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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
短句来源
    matter A model has specific area of 50.57g/m~2 and, matter B model 70.59g/m~2.Except the physical adsorption effect to gas, to large extent, Special property and high specific area of porous calcium phosphate is up to its self property.
    A型多孔磷酸钙的比表面积为50.57m~2/g,B型多孔磷酸钙的比表面积为70.59m~2/g。 多孔磷酸钙的特殊性能及高比表面的特点,对气体进行吸附时除表面物理吸附作用之外,很大程度是多孔磷酸钙自身的性质所决定。
短句来源
  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
短句来源
    matter A model has specific area of 50.57g/m~2 and, matter B model 70.59g/m~2.Except the physical adsorption effect to gas, to large extent, Special property and high specific area of porous calcium phosphate is up to its self property.
    A型多孔磷酸钙的比表面积为50.57m~2/g,B型多孔磷酸钙的比表面积为70.59m~2/g。 多孔磷酸钙的特殊性能及高比表面的特点,对气体进行吸附时除表面物理吸附作用之外,很大程度是多孔磷酸钙自身的性质所决定。
短句来源
  高比表面积
    Wollastonite reacts with hydrochloric to produce high specific area porous SiO 2 under the conditions of pH≤5,PEG and NH-4Cl as additive. The pH value is 4 after the reaction.
    硅灰石与盐酸反应合成高比表面积多孔SiO2 条件为pH值≤ 1.5 ,添加剂为聚乙二醇和NH4Cl,反应后体系中和到pH =4.0 ,经固液分离 ,烘干 ,6 5 0~ 75 0℃灼烧 2h得产物。
短句来源
    A series of Ni-Fe oxides with high specific area and Ce0.8Sm0.2O1.9(SDC) electrolyte were prepared using the nitrate-citric acid method. On the basis of Ni-Fe oxides and Ce0.8Sm0.2O1.9 electrolyte, Ni-Fe/SDC composite anode materials were prepared. Meanwhile, their microstructure and other performance-related parameters were also tested.
    采用硝酸盐-柠檬酸法合成了具有高比表面积的一系列Ni-Fe氧化物和电解质Ce0.8Sm0.2O1.9(SDC),利用上述材料制备出固体氧化物燃料电池(SOFC)复合阳极材料Ni-Fe/SDC,并对其微结构和相关性能进行测试.
短句来源
    Study of the Synthesis of High Specific Area Porous SiO_2 from Wollastonite and its Characteristics
    硅灰石合成高比表面积多孔二氧化硅及其表征
短句来源
    Development of Water TreatmentNano-modified CeramsitesFiller With High Specific Area
    纳米改性陶粒——高比表面积水处理填料的研制
短句来源
    Experimental study on metal gauze corrugated packing with high specific area
    高比表面积金属丝网波纹填料的实验研究
短句来源
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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.

The agglomerate mechanism of ultrafine oxide powers was investigated through the analyses of α -Al 2O 3 surface and the interaction between powders. Observations of IR, TEM and SEM analyses indicate that the high specific area and powerful surface energy of the ultrafine powders strongly absorb external impurities, e.g . H 2O, forming new surface structure(such as R-O-H). The increase of interface between powders and the surface activation of oxide. The chemical action or formation of new linking_ups...

The agglomerate mechanism of ultrafine oxide powers was investigated through the analyses of α -Al 2O 3 surface and the interaction between powders. Observations of IR, TEM and SEM analyses indicate that the high specific area and powerful surface energy of the ultrafine powders strongly absorb external impurities, e.g . H 2O, forming new surface structure(such as R-O-H). The increase of interface between powders and the surface activation of oxide. The chemical action or formation of new linking_ups between ultrafine powders, such as polymerization between hydroxyls (-OH), is the direct cause for the agglomeration of powders and suspension and the difference in the uniformity and density of green body and ceramics.

以亚微米α -Al2 O3粉为主要研究对象 ,从表面结构和粉粒间的相互作用分析入手对氧化物超细粉团聚机理进行了研究。红外光谱、透射电镜、扫描电镜分析研究表明 :高的比表面积和高的表面能使超细粉强烈吸附外来杂质 (如水 ) ,反应生成新的表面结构 (如R—O—H结构 ) ,增加了粉粒间相互作用力和表面活性。超细粉粒表面间化学反应 (如—OH基间聚合反应 )或生成新的连接物是氧化物超细粉及浆体产生团聚、影响坯体和陶瓷体均匀性及致密度的直接原因

 
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