The phase state,chemical structure,surface morphology,specific surface areas and mesoporous structure of the synthesized silica- based xerogels were measured systemically by means of X-ray diffraction(XRD),infrared spectrum (FTIR),transmission electron microscope(TEM),and N_2 adsoption-desoption(BET)techniques,re- spectively.
通过X射线衍射(XRD)、红外光谱(FTIR)、透射电镜(TEM)和N_2等温吸附-脱附分析,考察了合成硅基干凝胶的相态、结构、形貌、比表面积和介孔特征。
Catalyst activity was determined by not only specific surface area of catalyst but also the distributions of active center and utilization ratio of internal surface.
实验结果表明:催化剂活性比为不同催化剂单位质量表面上活性中心的总数目N总值的比值;催化剂活性不仅与比表面有关,还与其活性中心分布情况、内表面利用率有关。
A method for measuring the specific surface area and pore volume of ion-exchange resin by N_2 absorption apparatus is introduced.
介绍了用氮吸附仪测定离子交换树脂的比表面、孔容的方法。
The effect of preparation temperature on surface area of VPO catalyst;
合成温度对VPO催化剂比表面的影响
When the added amount of the surfactants of the different kind changes, the influence of the surfactants on the white carbon's DBP and surface area was studied on the conditions of the same or various content of SiO 2.
基于大量实验 ,研究了在SiO2 含量相同或不同的条件下 ,不同种的表面活性剂在其含量改变时 ,对提高白炭黑DBP和比表面积的影响·在传统的酸性硅溶胶两步法生产白炭黑的工艺基础上 ,增加一次添加表面活性剂的过程 ,从而获得吸油值高、比表面积大、具有气凝胶特性的优质白炭黑·同时探讨了表面活性剂使白炭黑改进性能的机
In order to examine the effecting of diffing metal catalyst's specific surface and pore structure on it's characterization,some samples,which have different specific surface and pore structure from the others were produced and measured on micro-reaction evolution equipment.
通过制备不同比表面和孔结构的系列脱灰剂样品 ,并在微反装置上进行测试 ,探讨了脱灰剂比表面、孔结构对其吸附脱除有机钛、钒等废催化剂的性能的影响 ,得出欲提高脱灰剂的活性必须使其具有适宜的比表面和孔结
A method of measuring specific surface of carbon materials, using CO_2 gravimetric adsorption technology at 298K, has been discussed.
讨论了碳质材料孔结构特性和比表面积求取的方法,认为以CO_2为吸附剂、在298K温度下用气相色谱等温吸附技术测定孔结构参数和比表面积是简单易行的方法。
As well,in the soil s (0～20 cm)coacervate constitution,the large soil types concent increased,the little soil types concent decreased and the specific surface dro.
经生物、化学改良后 ,0～ 2 0cm土层土壤微结构中大粒级颗粒含量增加 ,小粒级颗粒含量减少 ,土壤比表面值降低 ;土壤持水力降低 ,但有效水含量和比水容量增加 ,土壤供水能力增强 。
Effect of pretreated by K_2Cr_2O_7 solution and activated on specific surface area of carbon fiber;
重铬酸钾溶液预处理及活化对炭纤维比表面积的影响
Variation of pore structure of semi-coke with temperature and spatial location during pyrolysis ——Porosity,specific surface area and pore size distribution;
焦化过程半焦孔隙结构时空变化规律的实验研究——孔隙率、比表面积、孔径分布的变化
Calculation of the specific surface area of the froth in flotation;
煤泥浮选气泡比表面积的计算方法
Determination of catalyst′s specific area by LN_2;
低温氮吸附容量法测催化剂比表面积
The results show that,when the contents of titanium increase,the specific area of these hybrid materials increase accordingly.
结果表明:随着杂化材料中钛含量的增加,它们的比表面积随之增大。
By regressive analyzing the relation between specific area and water retention value (WRV) of the bleached eucalyptus KP can be expressed with a logarithm regressive equation as follows:y=127.
漂白桉木KP浆的保水值(WRV)与比表面积可建立数学模型y=127。
Preparation, Characterization and Application of High Specific Surface Area Activated Carbon;
高比表面积活性炭的制备、表征及应用
Method of determination for specific surface of cement
GB/T207-1963水泥比表面积测定方法
Testing method for specific surface of cement--Blaine method
GB/T8074-1987水泥比表面积测定方法勃氏法
Carbon black used in rubber products--Determination of specific surface area-CTAB test method
GB/T3780.5-1991橡胶用炭黑比表面积测定CTAB法
Method for specific surface area of chrysotile asbestos
GB/T6646.4-1986温石棉比表面积测定方法
CATALYTIC ACTIVITY AND BET SURFACE AREA OF METHANOL SYNTHETIC CATALYST CONTAINING ZIRCONIUM
含锆甲醇催化剂的比表面与催化活性
PREPARATION OF ACTIVATED CARBON WITH HIGH SPECIFIC SURFACE AREA FROM CORN COB
玉米芯制备高比表面积活性炭的研究
The Research of Producing High Surface Active Carbon with Petroleum Coke;
由石油焦制高比表面积活性炭的研究
Preparation of High Surface Area Nanometer γ-Al_2O_3;
高比表面纳米γ-Al_2O_3的制备研究
Latest research progress in preparation of titanium dioxide with high specific surface area
高比表面积二氧化钛制备研究新进展
Preparation of High Specific Surface Area MgO by a Gel-Templating Route
凝胶-模板法制备高比表面积氧化镁
Application of ASAP2020 specific surface area and porosity analyzer.
ASAP2020比表面积及孔隙分析仪的应用
ratio of heat transfer to skin friction
热传导与表面摩擦比
steel with a surface that is much harder than the interior metal.
表面比内部金属硬的钢。
It is more calm on his surface than reality.
他表面上比实际更冷静。
methods for comparison of surface roughness of plastics
塑料表面粗度比较法
Seeming friends are often more to be dreaded than open enimies.
表面上的朋友比公开的敌人更可怕。
Roughness comparison specimens for wooden pieces
GB/T14495-1993木制件表面粗糙度比较样块