查询词典 calcination

Most importantly, with analyzing the calcined cinder by X-ray powder diffraction and scanning electron microscope, it was clear that at an appropriate calcination temperature, the activated SiO2 and Al2O3 in alkaline coal-cinder would react with the decomposed fused Na2CO3 to form a new neutral matter nepheline（NaAlSiO4）and other amorphous silicate compounds,causing an obvious reduction of the alkali content in coal-cinder.

采用X射线粉晶衍射及扫描电镜对煅烧后的灰渣进行表征，揭示了含碱灰渣煅烧脱碱过程的实质，即在适宜煅烧温度下，含碱灰渣中被活化的主要矿物质SiO2、Al2O3和熔融并分解的Na2CO3（分解为修饰网络氧化物Na2O）等发生化学反应转变为中性物质霞石（NaAlSiO4）及其他无定形复合硅酸盐，从而降低了灰渣中的碱含量。

However,Mo species over the catalystwithout calcination mostly existed in the form of octahedral coordination,while,more MoS_2O_x and MoS_(4-x)~(2-) species were formed after sulfidation.

不经焙烧的催化剂表面的钼物种更多以八面体配位钼物种形式存在，因而硫化后形成较多的MoS_2O_x和MoS_(4-x)~(2-)物种。

It was indicated by UV-Vis spectra characterization that the precursor always contains the tetrahedral Ti species and the octahedral Ti species regardless of the Ti content. Calcination of the precursor resulted in a partial condensation of the octahedral Ti species to form the anatase phase.

UV-Vis 光谱表明，Ti-MWW 合成原粉中含有四面体的钛和八面体的钛，而八面体的钛属于一种骨架外钛，未经酸处理而煅烧会使部分八面体钛缩合形成锐钛矿，而经过酸处理和煅烧后的分子筛则几乎不含有锐钛矿。

In this thesis, the hydrosol of CeO2 nanoparticles. the transparent organosol of CeO2 nanoparticles and CeO2 nanoparticles coated with DBS have been first prepared by colloidal chemical method, The CeO2 nanoparticles with various particle sizes were obtained by different calcination temperature.

本文首次采用胶溶法合成了CeO_2纳米水溶胶、透明的CeO_2纳米有机溶胶、表面包覆DBS的CeO_2纳米粒子，将该粒子在不同温度下进行热处理得到不同粒径的CeO_2纳米晶。

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。

Study shows that the size of crystallite gets larger with the rise of temperature, while the influence of protraction of calcination time seems less significant.

XRD分析表明，当焙烧温度为300~800℃，焙烧时间为0.5~1.5h时均可以得到纳米晶CeO2，随着焙烧温度的提高，CeO2晶粒迅速长大，而延长焙烧时间对晶粒长大的作用较小。

Catalyst's reducibility had obvious difference under the different calcination temperature.

不同焙烧温度制备的催化剂，在还原性上具有很大差别。

In this paper, La-doped TiO_2 photocatalysts were synthesized via an improved hydrothermal synthetic route without calcination step, and were characterized by XRD, UV-Vis, IR and BET. The effect of ratio of water to alcohol, dopant content and reaction temperature on TiO_2 crystalline phase, crystallinity, and photoactivity for degradation of Rh B were discussed in detail.

从制备的角度来说，避免高温煅烧过程来制备小粒径、高比表面积、高结晶度、高光催化活性的二氧化钛，同时使用更加价廉易得的原料，尽可能地简化反应步骤，成为一个很有意义的研究方向。

Compared with other methods, the present solvent thermal method can produce ITO nano-powders with high purity and uniform particle size. The manipulation is very simple and convenient and no calcination process is needed. The reaction temperature can be as low as 190 ℃, which is by far the lowest temperature in ITO nano-powder preparation. The sample also gives a good dispersion property benefited from the unique solvent thermal reaction environment.

结果表明，制备的ITO纳米粉体为立方晶相，粉体的平均颗粒小于100 nm；与已有的ITO纳米粉体制备方法相比，本溶剂热法制备过程无需高温烧结、流程简单，反应过程所需的温度可低至190 ℃，是迄今为止文献报导制备ITO的最低温度，同时所得产物纯度高、粒度均匀、分散性很好。

He tells a reporter,"Skyline sightseeing is round " place of these 5 words wants expression, it is a praise occasionally, it is criticism occasionally, it is silent as the grave even occasionally the exposure of ground general in the public eye, pass the calcination of numerous netizen look, the person that let be paid close attention to thereby produces some kind of self-communion.

他告诉记者，"天涯观光团"这五个字所要表达的，有时候是赞扬，有时候是批评，有时候甚至是一言不发地将之暴露在众目睽睽之下，通过众网友目光的灼烧，从而让被关注者产生某种自省。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了