查询词典 surface area

From thermal analysis, weight loss occurs pronouncedly at temperatures above 300 oC in air and the residual weight increases with the reaction temperature. The particle size decreases with the increasing ethanol concentration., while the BET surface area decreases when the concentration of water is increased. Pore size measured from the as-synthesized particles is about 2.7 - 4 nm and this becomes slightly smaller after calcination which is about 3 - 5 nm.

TG/DTA中温度上升至约300 oC时，重量开始明显失重，随著合成反应温度上升，最终残留量由1~3%提高为约5~7%，动态光散射粒径分析发现随著乙醇含量增加，煅烧前与煅烧后的粒径尺寸均有下降趋势，随著水含量的增加，比表面积值随著下降，煅烧后的壳层孔隙尺寸约为3~5nm，煅烧前的壳层孔隙尺寸为2.7~4 nm，煅烧后的孔隙度会略为上升。

Nanoparticle of an appropriate proportion were homogeneously dispersed in the PI matrix, and the interfacial adhesion between the matrix and the nanoparticle was hence strong owing to the high specific surface area and reactivity of the nanoparticle. Subsequently, the molecular chains of PI attained unchanged or even increased interaction at a proper mass fraction of the nanometer particle, which contributed to improve the wear-resistance of the nanocomposites.

采用PI的原位聚合填充方法，利用聚酰亚胺与无机纳米表面较强的相互作用（如静电作用、较强的范德华力、氢键甚至化学键的形成），用非水悬浮工艺制备了无机纳米/聚酰亚胺纳米复合材料，率先用大型分析仪器全面地表征了复合材料的结构，采用原位聚合填充法制备的聚酰亚胺复合材料中，无机纳米分散状态良好；无机纳米氧化物/聚酰亚胺复合材料的结构表征显示出PI有机相和SiO〓无机相之间形成了键联型复合体系，两相相互影响；在复合体系中，单相本体的结晶结构并未发生改变；在摩擦过程中纳米氧化物没有发生价态的转变；无机纳米氧化物的加入，提高了聚酰亚胺的耐热等级；适量纳米氧化物并不影响复合材料的机械性能， 2。

The increase in specific surface area, porosity ratio and pore volume by pulverization is favourable of coal combustion.

研究结果表明，通过煤粉的细化、超细化煤粉颗粒的比表面积、孔隙容积与空隙面积显著的提高，对其燃烧过程带来有益的影响。

The specific surface area and pore volume increase with the size of coal particles decreasing during superfine pulverization.

煤在粉碎超细化的过程中，随着粒度的减小，煤粉的比表面积增大、表面活性增加、孔体积增大，吸附性能增加。

The radiating surface area is 15 x .31 x 3.14, or 15 square inches.

辐射面积即为15 x 。31 x 3.14，即15平方英寸。

The surface area of the water in rain gauge often change because of the shaking of the research vessel,so the precipitation measurement on the sea always has big error.

1引言降雨量是指从天空降落到地面上的雨水，未经蒸发、渗透、流失而在水面上积聚的水层深度，它是地球上水分循环的重要途径之一。

And what is most commonly used is a nanometer iron, it has the strong reducibility, because is nanomaterials, its volume is small, is bigger than the surface area, may contact as far as possible many materials.

其中最常用的是纳米铁，它具有较强的还原性，由于是纳米材料，其体积小，比表面积大，可以接触到尽量多的物质。

Molecular sieves are very important catalyst because it possess regular pore shape and high surface area, which have been widely used in many chemical processing as a catalyst or support, especially in petrochemical process.

分子筛由于具有规整的孔道结构和高比表面积而在很多化工过程中被用作为吸附剂和催化剂或催化剂载体，特别是在石油化工过程中。

The values of d50 were relative to the specific surface area of GGBS.

我国矿渣微粉的生产和应用量也在逐年增大。

Humidity aging rate is relative to exposed surface area and scale of specimens.

湿老化速度与试件尺寸及暴露表面积有关。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新