共查询到17条相似文献,搜索用时 562 毫秒
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纳米Co-B非晶态合金对高氯酸铵分解的催化性能 总被引:1,自引:0,他引:1
利用化学还原法制备了纳米 Co-B 非晶态合金,并用透射电镜、X射线衍射、差示扫描量热和N2吸附表面积测试等技术对样品进行了表征. 运用差热分析研究了纳米 Co-B 非晶态合金对高氯酸铵(AP)分解的催化性能. 结果表明,加入 Co-B 非晶态合金后AP的高低温放热峰相连,合并成一个高而大的放热峰,且峰温有很大程度的降低, 这说明纳米 Co-B 非晶态合金对AP热分解有很好的催化活性. 同时, Co-B 非晶态合金能使AP的表观分解热显著增大. 相似文献
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Kunio Shinohara Sadao Aoki Mihiro Yanagihara Akira Yagishita Yasuo Iguchi Akira Tanaka 《Photochemistry and photobiology》1986,44(3):401-403
X-ray microscopy is one of the useful applications of synchrotron radiation researches, and at present, X-ray contact microscopy is the best developed method in this field. The images on the resist in X-ray contact microscopy have been observed with a scanning electron microscope, and there have been some attempts to use the transmission electron microscope, but few have used the replica method. We have applied the replica method with plasma polymerization-film to observe X-ray images on the resist with a transmission electron microscope and found it to be applicable.
A long exposure time is required when we use the monochromatic synchrotron radiation with a grasshopper monochromator. Our preliminary experiments with a new light source, undulator radiation, showed that it is very intense and useful for X-ray contact microscopy. 相似文献
A long exposure time is required when we use the monochromatic synchrotron radiation with a grasshopper monochromator. Our preliminary experiments with a new light source, undulator radiation, showed that it is very intense and useful for X-ray contact microscopy. 相似文献
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This review presents a number of mathematical expressions which the experimental scientist may find useful to fit to time-dependent luminescence intensity (and concentration) data for both decay and rise situations. Some of these expressions have been drawn from literature sources and are presented here in a unified form. In compiling these expressions, a number of gaps were found in the literature, and, in this review, new expressions have been derived to fill some of these gaps. The final section of the review summarizes both the existing and the new kinetic expressions and provides an explanation of how to use them. Some of the subtleties and pitfalls of using kinetic data fitting to determine reaction mechanisms are also discussed. 相似文献
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In this work, kinetic data of crystallization processes have been determined by measurement of the intensities of reflection of X-ray diffraction spectra and modeled using the Avrami-Eroféev and Jander expressions. We have created a simple Microsoft Excel spreadsheet that allows students to calculate the kinetic data. Students will be able to calculate the kinetic parameters of any crystallization process, for example, hydrothermal crystallization of catalytic materials like zeolites. The possibility of using the spreadsheet with different models or expressions and discriminating among them is also validated by comparing the model results with experimental data (differential thermal analyses, DTA) from papers available in the recent literature. 相似文献
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赵深 《高等学校化学学报》1980,1(1):105
本文提出了键轨道线性组合分子轨道(LCBOMO)法,并用这个方法处理若干类型交替烃的Π键结构。给出同系物分子Π电子能量、波函数以及键级的通式。阐述了共轭能和成环能产生的根据。LCBOMO法使用价键模型,计及了"π键"间的相互作用,得到与共轭效应符合的结果,因而对价键理论有所发展。 相似文献
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估计聚合热与熵的原子团加和法 总被引:2,自引:0,他引:2
<正> 二十年来,Benson-Buss原子团加和法,已广泛用于低分子化合物的热力学参数估计.我们认为它也可以推广到高分子化合物,用来估计聚合热、聚合熵与聚合自由能等.本文推荐的经验估算法比文献估算方法有三个优点:简单直观;物理意义明确;不必引入任何另外的经验参数. 相似文献