Effects of ion irradiation on H2O and CO2 absorption and desorption characteristics of Li2ZrO3 and Pt-coated Li2ZrO3

The effects of irradiation with 10 keV D₂⁺ ions on the hydrogen and water absorption and desorption characteristics of Li₂ZrO₃ and platinum-coated Li₂ZrO₃ (Pt-Li₂ZrO₃) were investigated by employing elastic recoil detection (ERD), weight gain measurement (WGM), and thermal desorption spectroscopy (TDS). WGM and ERD results indicated that the amounts of H and H₂O absorbed into the ion irradiated bulk Li₂ZrO₃ and Pt-Li₂ZrO₃ samples in air at room temperature increased up to ～2–3 times, as compared with those of the unirradiated ones. TDS examinations revealed that the amounts of hydrogen molecules (H₂) and H₂O released from the unirradiated Pt-Li₂ZrO₃ and ion irradiated Li₂ZrO₃ and Pt-Li₂ZrO₃ were approximately one order of magnitude higher than those of unirradiated Li₂ZrO₃. Li segregation, ion-induced oxygen deficiency, as well as Pt deposition significantly enhance the splitting of H₂O, eventually increasing the amounts of H accumulated in the bulk Li₂ZrO₃ and the H₂ release.     

Oxycellulose modification

Sodium salts of oxycellulose have been prepared by different techniques and under different conditions to obtain a white powder salt of lowest carboxyl group content. Also, Fe(III) and Al(III) salts have been prepared from oxycellulose and from its sodium salt. To prepare amphoteric cation exchange derivatives, anionic oxycellulose was cationized by reaction with Refaktan K, a common commercial cationizing agent which contains diepoxypropyl dimethyl ammonium chloride: different reaction conditions such as percentage cationizing agent, temperature and time have been investigated. Polyelectrolyte titration was used to measure the ion activity of the different products. Infrared spectroscopy of the different samples was carried out and the results analysed and discussed. © 2000 Society of Chemical Industry     

Iodinated P(MMA‐NVP): an efficient matrix for disinfection of water

Polymethyl methacrylate‐N‐vinyl‐2‐pyrrolidone P(MMA‐NVP) copolymer was synthesized in an inert atmosphere by bulk polymerization using azobis‐isobutyronitrile (AIBN) as initiator. The copolymer was crushed, and ground to a defined particle size and iodinated. The iodinated copolymer matrix was washed thoroughly in a suitable solvent so as to remove any residual iodine and characterized using solubility, swelling, viscosity, FT‐IR, and ¹H‐NMR studies. The iodinated copolymer was then packed in a refill cartridge specially designed for the purpose. The release of iodide ions from the iodinated matrix was measured in a continuous flow system by directly attaching the cartridge to the water tap and adjusting the flow rate. The water samples were collected at regular intervals and estimated for the concentration of iodide ions using an iodide ion selective electrode. The antimicrobial activity of the copolymer was estimated against bacterial (both Gram‐positive and ‐negative) and fungal species using the zone of inhibition technique. In addition, efficacy of the iodinated copolymer against a variety of microbes was established by inoculating a microbial culture in the water reservoir and measuring the rate of survival of microbes after passing through the copolymer‐filled column. The iodinated copolymer was found to be effective against a variety of microbes and remained so completely until 5000 L of water had passed. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 1109–1116, 2000     

基于小波分形和Kalman滤波的航迹追踪方法

利用多尺度小波变换和分形的方法,对一个或多个传感器观测到的航迹数据序列进行多层次分析,动态提取航迹数据的特征,建立关联准则,以形成一个目标的主要航迹,并结合Kalman滤波的方法,实现了目标航迹自动关联和追踪的目的.仿真实验表明这种方法是可行且有效的.     

石油焦用作锂离子电池负极

本文研究了锂含量和热处理温度对石油焦性能的影响,获得了比容量达200mAh/g以上的石油焦,并应用于AA型锂离子电池,容量为400mAh以上。     

锂离子电池锰系正极材料的研究进展

综述了锂离子电池中锰系正极材料的研究和发展。对尖晶石型LixMn2 O4、正交晶系LiMnO2 、复合多维含锂二氧化锰 (CDMO)等电极材料的合成制备方法、晶体结构、充放电容量、电化学特性等进行了较为详细的论述。     

纳滤技术处理精炼糖厂离子交换树脂再生脱色液的研究

精炼糖厂离子交换树脂再生脱色液由于含有大量再生剂和色素,需要处理达标后排放。本研究分析了再生脱色液的主要成分和性质,利用纳滤技术对其进行处理,以色素截留率和氯离子去除率作为考查指标,筛选出适合处理再生脱色液的纳滤膜型号,并优化纳滤工艺参数,为纳滤技术治理精炼糖厂离子交换树脂再生液提供参考。实验结果显示：选用型号为44030的纳滤膜进行实验,能有效去除氯离子和截留色素,而且易于清洗;在最佳纳滤工艺下,脱色液氯离子去除率70％以上,色素截留率99．8％以上。     

离子色谱技术及其在食品分析中的应用

本文介绍了离子色谱技术近年来的新进展，评述了离子色谱法在食品分析领域中的应用，包括测定食品中的无机阴离子，阳离子，低分子羧酸，氨基酸，碳水化合物等的分析方法。参考文献９９篇。     

极化轨道约束下的最优极化（三）

本文研究了极化测量过程中的信号增强问题,提出利用信号干扰功率差（ＰＤＳＩ）作为优化目标函数,以改善恶劣电磁环境中的信号接收质量。文中求解了以ＰＤＳＩ作为目标函数时的全局最优极化以及极化轨道约束下的局部最优极化,并给出最优极化对改善信号接收效果以及极化轨道对于改善信号接收效果有效度的定量描述。     

故障树分析法在RIE故障诊断中的应用

基于半导体刻蚀技术,对RIE(反应离子刻蚀)的技术原理和等离子启辉原理进行了阐述,概括介绍了故障树分析法,绘制了启辉故障的故障树,分析了造成该故障的各种原因,并根据维修经验介绍了APC(自动压力控制)故障和AMU(自动匹配网络)故障等一些典型因素的处理方法。