比表面

• The results showed that controlling ph value and increasing ? potential can improve the dispersal of powders and finally enhance the gas - sensitivity of a - fe2c3 sensor . the study of the microstructure and properties of gas - sensitivity for the prepared powders also exhibited that azeotropic distillation and sol - gel method can competently prevent the formation of hard agglomeration , and so good sensitivity is obtained
  结果表明，在碱性较强的条件下，电位较大，易制得团聚少、比表面较大的纳米粉体；共沸蒸馏和sol - gel后处理方法能有效防止粉体的硬团聚，有利于提高其元件的灵敏度。
• At the beginning of the reduction , the spherical ni powders precipitated at the tip of the precursor where specific surface energy is higher , then more and more ni powders appeared at the edges and the surface of the precursor ; finally the spherical ultrafine ni powders take the place of the whole precursor
  在还原过程中,超细镍粉首先从冻干前驱体的尖端等比表面能较大的地方析出;随后前驱体的棱和表面逐渐析出大量的超细镍粉;最后镍粉颗粒替代整个前驱体,得到球状超细镍粉。
• Activated carbon is of large surface area and stong absorbility . it can be used for desulfurizaion , debenzolization . deodorization and decolourization , it can also be used in selective absorption and elimination of some chemical or mechanical impurities in liquid or gas phase in the field of chemical , oil and gas , metallurgical , water treatment and environmental protection industries , as well as the dalily life
  活性炭是一种多孔性物质，它比表面大、吸附性强，能脱硫、脱苯、脱臭、脱色，还能选择性地脱除液相或气相中某些化学杂质，可广泛应用于化工、石油、天然气、冶金、原子能、水处理、食品、纺织、医药、城建及环保等工业过程和人类生活中。
• Abstract : the interface behavior between essence and ethylene - vinyl acetate copolymer pallets was studied so that necessary data were obtained to guide the preparation of fragrant masterbatch . the adsorption type and wettability between essence and the copolymer pallets were analysed by measurements of fourier transform infrared spectrum , surface tension , contact angle and specific surface area . the technical factors affecting absorptivity such as the charge ratio , temperature , pressure and stirring speed were studied by series of adsorption experiments . the results showed that the adsorption of essence on the surface of ethylene - vinyl acetate copolymer pallets is physical in nature . essence couldn ' t moisten the surface of ethylene - vinyl acetate copolymer pallets absolutely , but it could be soaked into the surface of the pallets partly . adsorptivity could be increased by enhancing the temperature , pressure and stirring speed , but the extension of adsorption time had little influence on adsorptivity
  文摘:研究了香精与乙烯/醋酸乙烯共聚物粒子之间的界面行为，以便为香型母粒的制备提供必要的理论依据.利用傅立叶变换红外光谱、表面张力、接触角及比表面面积等测定手段，分析了香精与载体之间的吸附类型和润湿作用.并通过一系列吸附实验，讨论了配料比、温度、压力、搅拌等工艺条件对吸附量的影响.结果表明，香精在乙烯/醋酸乙烯共聚物粒子表面的吸附为物理吸附；香精无法完全润湿载体粒子表面，但可以对其形成部分浸润；提高温度、压力、搅拌速度可以增加吸附量，而延长吸附时间对增加吸附量贡献不大
• Furthermore , we compared the mechanical properties between the modified nano - cac03 / pp and unmodified nano - cac03 / pp . we have investigated the composites by means of mechanical testing , dsc , xrd , ft - ir , tem , sem , etc . the relation between the structure and property of the composites has been discussed in this thesis . we studied the nano - particles by means of ls particles size analysis , we also studied the modified nano - cac03 by means of ft - ir
  论文中对caco _ 3粒子进行了粒度与比表面测试分析，对经钛酸酯偶联剂表面改性的纳米caco _ 3粒子进行了红外吸收光谱分析，对改性后的复合材料进行了力学性能测试、差热扫描量热分析、 x射线衍射谱、红外吸收光谱、透射电镜、扫描电镜等分析，讨论了样品中结构和性能之间的关系。
• Organobentonite is a kind of hydrophobic bentonite which prepared by exchanging inorganic cations in the layer of bentonite with organic cations or compounds . it combines inorganic bentonite ' s excellent dilatability , adsorption and dispersion with huge hydrophobic area , so it has very good affinity for organic substance , has been widely used in all kinds of organic system
  有机膨润土是用有机阳离子或有机化合物与膨润土层间的无机阳离子发生交换而生成的一种疏水亲油的膨润土。由于其既具有无机膨润土优良的膨胀性、吸附性和分散性，又具有疏水亲油性的巨大比表面，与有机物具有很好的亲和性和相容性，己被广泛应用于各种有机体系。
• The preferred ranges of operation variables are presented on the basis of quantities of experiments , and additionally , the optimized proportion of mpf and suitable operating conditions are determined : retaining temperature about 800c for 2 hours , with the mpf content of 26 . 7 : 16 . 6 percent , good carrier beads with pore size range 60 ~ 180um , porosity above 40 % , strength above 3 . 6mpa can be obtained
  通过试验确定了复配造孔剂的适宜比例和工艺条件：采用复配造孔剂组分26 . 7 ： 16 . 6 ( )的比例造粒，在800左右烧结，保温2小时的条件下，保证产品颗粒孔径在60 180 m ，比表面达到1 . 94m ~ 2 g ，孔隙率稳定在40以上，而强度达到3 . 6mpa以上。