镁带表面黑灰色薄膜组成分析

对牡丹牌镁带(43 mm×3 mm)表面黑灰色薄膜进行了X射线衍射分析,结果表明牡丹牌镁带表面黑灰色薄膜组成是Mg(OH)2和Mg,并以此实验研究结果为基础,对镁带表面黑灰色薄膜形成、显色机理做了理论分析,模拟实验结果进一步验证了理论分析。     

稀土钙钛矿氧氮化物的研究进展

近年来,稀土钙钛矿氧氮化物因其出色的多功能性以及在光学、光催化、介电和磁性材料等领域的应用前景备受关注。本文介绍了稀土钙钛矿氧氮化物的结构稳定性计算方法,总结了其制备方法,最后阐述了其主要应用情况,并对其进一步研究和发展进行了展望。     

Electromagnetic dissociation of 3.7 A GeV^16O in nuclear emulsion

The electromagnetic dissociation (ED) of 3.7 A GeV {}^{16}O in nuclear emulsion is investigated with high statistics. It is found that the electromagnetically dissociated cross section increases with increasing beam energy, the charge distribution of projectile fragments is the same as the results at 60 and 200 A GeV, and the production probability of projectile fragments with charge 3≤Z≤5 is less than that of the other projectile fragments. These results can be well explained by use of Weizsacker and Williams method for calculating the ED contributions. The percentile abundance of various decay modes for ED at 3.7 A GeV is close to the result at 60 and 200 A GeV, but it is different from the result at 14.6 A GeV. The ED of 3.7 A GeV is mainly caused by the giant dipole and quadrupole resonance of E1 and E2, which can be qualitatively explained by the multiplicity distribution of projectile proton in ED. The multiplicity distribution of the α fragments in ED and nuclear events have different functional forms. This difference may be a consequence of the different reaction mechanism involved.     

欢迎订阅2007年《化学教育》期刊

全国高等师范院校第十五届物理化学暨第十一届物理化学实验教学研讨会于2006年7月28日至8月1日在云南大理学院召开，来自全国47所院校的90位代表出席了会议，递交论文60篇。     

对2008年高考理综全国卷（Ⅰ）一些化学试题的分析

2008年高考理科综合能力测试全国卷(I)中的化学试题所涉及的知识内容多是中学化学基础知识,旨在考查中学化学核心内容,体现源于课本,高于课本的命题精神,较往年有一定的变化,其显著特点是体现创新精神.正是这种新的变化成为人们普遍关注的热点,笔者对一些化学试题中存在的问题分析如下.     

Fragmentation in ^16 O-emulsion interactions at 3.7 A GeV

The topology of ¹⁶O fragmentation at 3.7 A GeV in reactions with emulsion nuclei is presented. The multiplicity distributions of projectile fragments,charged secondaries and their dependences on the projectile residues are discussed.     

ZnO的改性及其光催化性能的研究进展

氧化锌(ZnO)是一种重要的半导体光催化剂，具有光催化活性高、价格低廉、化学稳定性好和无毒无害等优点.但是其自身存在一定的缺陷，国内外学者曾采用多种方法对其修饰改性.本文主要综述了ZnO修饰改性的方法，包括掺杂金属与非金属、贵金属沉积、构建异质结及耦合碳材料.其次，综述了复合材料的光催化性能，最后对ZnO在光催化方面的发展前景进行了展望.     

对过氧化钠与水反应问题的研究

1.问题的提出 过氧化钠与水反应的实验是中学化学课堂重点演示实验,从目前情况看该实验的研究还有许多亟待解决的问题.特别是过氧化钠与水反应生成氧气质量的理论计算和实验结果的矛盾[1]、过氧化钠与水反应后溶液具有漂白性的原因[2-3]、双线桥标出过氧化钠与水反应过程中电子的得失[4]等疑难问题更为突出,所以从实验和理论上对上述疑难问题加以认真的研究是非常必要的.     

Intermittency in 3.7 A GeV ^16O-emulsion interactions

The intermittency effect has been studied for an interaction of 3.7 A GeV ^16O with emulsion using the distributions of both the pseudorapidity intervals and the azimuthal angle intervals of the shower particles emitted in a central rapidity region. The scaled factorial moments, reduced scaled factorial moments and multifractal moments as functions of the bin size in pseudorapidity and in azimuthal angle have been calculated and have revealed the presence of an intermittent behaviour which may be due to the random cascading property of the reaction. The anomalous fractal dimension has been found to increase with the increase of rank of the moment.     

对电解熔融氯化铝问题的思考

一般认为“氯化铝是分子晶体,熔融的氯化铝不导电,在电解槽中不能电解”,但这不是绝对的,我们可以改变它的环境,比如电解NaCl—AlCl3熔盐制铝[1],这一类似问题在中学教辅材料中早有体现,如电解Al2O3—Na3AlF6制铝,其中Na3AlF6的引入便是问题的关键,近年来Al在NaCl—AlCl3熔盐体系中的电沉积研究已经取得了很多研究成果[2],以下对电解熔融氯化铝问题进行分析。1电解熔融氯化铝问题的理论分析纯的氯化铝是无色的晶体,在通常情况下氯化铝容易挥发,180℃时开始升华,研究其蒸气密度表明在400℃以下氯化铝的分子式为Al2Cl6,氯化铝溶于有机…