查询词典 surface area

Specific surface area, carbon and metal oxide contents of fly ash play an important role in the catalysis process.

其中，粉煤灰的比表面积、未燃炭以及活性金属氧化物均是影响其催化活性的重要因素。

The result showed that two-step heating carbonization process can improve the performance of wood charcoal.It was found that as carbonization holding time increased,the surface area and total pore volume of the samples increased,with pore radius ranging from 0.6 to 2 nm.

结果表明：二步炭化法可很好地提高木炭的性能，可制得孔径主要集中在0.6～2.0 nm的活性木炭；随着保温时间延长，活性木炭的比表面积、孔容积均增大。

The results show that LSCF and LSM precursors can be transformed to the pure orthorhombic perovskite structure having been calcined at 900℃ and 1200℃ for 5 h, respectively, and LSCF cathode has a smaller particle size and a bigger specific surface area compared with LSM cathode.

采用氨水沉淀法分别制备La0.6Sr0.4Co0.2Fe0.8O(下标 3-δ)与La0.8Sr0.2MnO(下标 3-δ)两种阴极材料，并用X射线衍射、场发射扫描电子显微镜和比表面积对所制备材料的结构、晶粒大小、形貌及比表面积进行表征。

The powder characteristics of the converter steel slag cooled naturally,with 210～485 m~2·kg~(-1) Blaine specific surface area,have been studied by using a 500×500 mm cement ball mill as grinding device in this paper.

采用500×500 mm球磨机，磨制了比表面积为210~485 m2.kg-1的慢冷转炉钢渣粉体，并对其粉体特性进行了研究。

The other is check chamber which provide a large surface area for both absorbing and giving up heat.

另一个是蓄热室，它有很大的表面积供吸热和散热。

In addition, the exfoliation and intercalation of three kinds of novel layered aluminophosphate are investigated systematically, and mesoporous materials with high surface area chromium oxide supported aluminophosphate are synthesized successfully.

同时对三种层板具有规整微孔结构的层状磷酸铝的剥离与嵌入进行了系统研究，并成功地制备了高比表面的微介孔材料——铬柱磷酸铝。

The columnar-like structure with preferred orientation exhibits higher photocatalytic efficiency, since the columnar structure has larger surface area.

在常压下制备的样品的光催化效率比在低压下制备的样品提高了两倍。

The crown surface area was decreased with stand density and the relationship between crown volume and stand density was not significant.

林分树冠表面积和树冠体积预估模型的检验结果表明，两个模型的平均相对误差都在 8％之内，预估精度均大于91％，说明所建模型可以很好地预估樟子松人工林不同林分条件下的林木树冠表面积和树冠体积。

Compared with the MgO prepared by direct thermal decomposition of the MgO precursor, the novel high-specific-surface-area MgO material contains more strong basic sites and less acidic sites and exhibited higher acetone yield and selectivity in isopropanol decomposition, making it a potential solid base catalyst.

与直接焙烧四水乙酸镁制得的MgO相比，这类新型高比表面积MgO具有较多的强碱位和较少的酸性位，并在异丙醇催化分解反应中表现出更高的丙酮收率和选择性，有望成为一类优良的固体碱催化剂。

The draw ratio is the direct relationship between the draw punch and the blank edge—the greater the distance between the draw punch and the blank edge, the greater the resistance to flow, primarily because of the additional surface area of sheet metal clamped between the die face and the blank holder.

拉伸比直接体现在拉延凸模和板料边缘之间的关系--拉延凸模和板料边缘之间的距离越大，限制流动的阻力越大，主要是因为在压边圈和凹模表面间有额外金属板表面被夹紧。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。