A Study of RuO_2-Co_3O_4-TiO_2(60)Coating on Ti-Substrate for Chlorine Gas Evolution

用稳定极化、Ｘ射线衍射、透射电镜和扫描电镜的方法研究了钛基ＲｕＯ_２－Ｃｏ_３Ｏ_４－ＴｉＯ_２（６０）涂层的析氯活性、导电性、使用寿命、微观结构和表面形貌。并对其活性表面积进行了评价。详细讨论了涂层成份、微观结构和表面形貌对涂层析氯活性和活性表面积的影响。发现在０～１０ｍ／ｏＣｏ_３Ｏ_４和６０ｍ／ｏＴｉＯ_２成份范围内ＲｕＯ_２、Ｃｏ_３Ｏ_４和ＴｉＯ_２可形成单一金红石型固溶体，且有优异的析氯活性、电导率和使用寿命。以此研究为基础可改进氯碱工业广泛使用的传统ＲｕＯ_２－ＴｉＯ_２阳极，降低阳极涂层中贵金属含量，提高阳极的电化学性能．The chlorine gas evolution activity,electric conductivity,service life,microstructure and surface morphology of RuO2-CO3O4-TiO2(60) coating on Ti-subetrate were studied in 0～30 m/o Co3O4 range by steady-state pelarization,x-ray diffraction,TEM and SEM methods.Active surface area of the coating was also evaluated. The in fluences of coating composition,micrortructure and surface morphology on chlorine gas evolution activity and active surface area of the coating were discussed in detail.As a result,sole rutile-type solid solution of RuO2,CO3O4 and TiO2 which showed better chlorine gas evolution activity,electric conductivity and service life was found in ca. 0～10 m/o Co3O4 range. Traditional RuO2-TiO2/Ti anedes being widely used in chlor-alkali industry could be medified by a suitable amount of Co3O4 for the benefit of reducing content of Ru as a noble metal in the coating and improving the electrochemical properties of the anodes.作者联系地址：中国科学院金属腐蚀与防护研究所Author's Address: Institute of corrosion and protection of metals,Academia Sinica,Shenyang 11001

The Study on Bird Community Diversity along the Xiamen Coastal Wetland in Summer

在夏季(1999年6月~1999年8月)对厦门滨海湿地11个样区鸟类的种类和数量进行的调查中,显示出厦门滨海湿地鸟类共有11科27种.其中,小白鹭(Egretta garzetta)和环颈鸻(Charadrius alexandrinus)为数量优势种.鸟类群落多样性指数以香山和筼筜湖两个样区为最高,分别为3.18和2.33,刘山多样性指数最低,为0.The bird species and their population abundance were investigated in 11 sampled areas along Xiamen coastline during summer(from June 1999 to August 1999).The results showed that there were 11 families and 27 species of birds found in Xiamen wetlands during the research period.The dominant species in population size were Little Egret(Egretta garzetta) and Kentish Plover(Charadrius alexandrinua),which reflect that many birds have lefted Xiamen coastline,and the individual number of there 2 species occupied 70.33% of the total individual number.Little Egret was the commonest bird,which distributed in every quadrat of the area.The diversity index of the bird community was higher in the reservoir of xiangshan(3.18) and Yundang Lake(2.33),and lower in Liushan(0).The diversity index of the bird community was mainly influenced by the amount of bird species and by the evenness of population number among the species.福建省自然科学基金(D9910003);; 厦门市环境保护科研所资助项

2-苯甲酰吡啶的低温热容及其热力学性质研究

2-benzoylpyridine is an important raw material and intermediate, which has been used in the synthesis of many organic compounds. In order to better understand the process of chemical reaction of this compound, develop its new application and carry out relevant theoretical research, the thermodynamic properties are needed. The heat capacities of 2-benzoylpyridine were measured with an automated adiabatic calorimeter over the temperature range from 80 to 370 K. The melting point, molar enthalpy, fusHm, and entropy, fusSm, of fusion of this compound were determined to be 316.38 K, 23.181 kJ mol-1 and 64.145 J mol-1 K-1, respectively. The purity of the compound was calculated to be 99.60 mol% by using the fractional melting technique. The thermodynamic functions relative to the reference temperature (298.15 K) were calculated based on the heat capacity measurements in the temperature range between 80 K and 370 K. The thermal properties of the compound were further investigated by differential scanning calorimetry (DSC). From the DSC curve the molar enthalpy and entropy of evaporation of this compound were determined to be 51.3±0.2 kJ mol-1 and 99.1±0.4 J mol-1 K-1, respectively

Double-arm four-wheel polling robot mechanism

本发明涉及一种移动机器人，具体地说是一种双臂四轮式巡检机器人机构，包括箱体及结构相同的前、后手臂机构，前、后手臂机构分别安装在箱体上，每个手臂机构上均包括行走机构、翻转机构、俯仰机构、夹紧机构及支撑臂，支撑臂的一端与箱体相连，另一端铰接有俯仰机构，俯仰机构的两端分别设有前、后翻转机构，可由水平状态翻转至垂直状态的前、后行走机构分别连接于前、后翻转机构的输出端，前、后行走机构及前、后翻转机构与俯仰机构连动；在前、后行走机构的正下方设有安装在支撑臂上、可上下移动夹紧地线的夹紧机构。本发明机器人机构具有安全保护性好，爬行越障能力强，工作空间大，应用范围广等优点

掺杂碳纳米管的金属有机骨架材料及其应用

本发明涉及一种掺杂碳纳米管的金属有机骨架材料的制备方法，通过在金属有机骨架化合物中掺杂不同含量的碳纳米管，从而制备出具有较好的二氧化碳分离性能的材料。制备步骤如下：将碳纳米管，金属盐和苯二甲酸溶解于有机溶剂或水中，在温度70～220℃下晶化反应5～120小时，自然降温后取出，经过抽滤、洗涤和干燥,制得掺杂的金属有机骨架材料。本发明制备工艺简单，直接采用溶剂热合成法，成本较低，制得的材料具有良好二氧化碳吸附分离性能

Z扫描法研究nc-Si/SiN_x多量子阱材料非线性光学特性

采用射频磁控反应溅射技术与热退火处理制备了nc-Si/SiN_x多量子阱材料.对样品进行了小角度XRD、Raman光谱、吸收光谱测试,研究了其结构和光学性质.采用皮秒脉冲激光单光束Z-扫描技术研究了样品在非共振吸收区的三阶非线性光学特性.实验结果表明,其非线性折射率为负值,非线性吸收属于双光子吸收.由实验数据计算得材料三阶非线性极化率为7.50×10~(-8)esu,该值比体硅材料的三阶非线性极化率大4个数量级.对材料光学非线性产生的机理进行了探讨,认为材料的非线性极化率的增加来源于材料量子限制效应增强