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Corrosion behaviour of die-cast AZ91D magnesium alloys in sodium sulphate solutions with different pH values TIAN Yun1, YANG Li-jing1, LI Yan-fang1, WEI Ying-hui1, HOU Li-feng1, LI Yong-gang1, Ri...) solutions with different pH values. The corrosion rates, morphologies, and compositions of the corrosion products were studied by means of scanning electron microscopy (SEM), Fourier transform infrared......
pH值对电化学制备纳米铜粉的影响徐建林1,陈纪东2,杨树华1(1.甘肃省兰州市兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室2.绍兴市质量技术监督检测院,浙江绍兴 312017)摘 要:在十二烷基硫酸钠,吐温80,十二烷基硫醇和硫酸铜混合而成的乳液中,采用电化学合成方法制备稳定的,粒径均匀的Cu纳米颗粒.应用XRD,TEM及FT-IR对所制备的Cu纳米颗粒的结构,形貌及粒径大小进行表征.结果表明,随着pH值的增大,纳米铜粉的尺寸,分散性及颗粒分布范围发生显著的变化.当pH为0.5时,可以制备得到尺寸较小,分散性较好,颗粒分布较窄的纳米球形颗粒.随着pH值增大,纳米颗粒的尺寸也随之增大.关键词:金属材料; 纳米铜粉; 电化学法; pH......
聚合物在pH传感器中的应用孙爱娟,方芬宁夏大学化学化工学院摘 要:综述了聚合物基pH传感器的研究现状:聚合物作为敏感层,衬底或传输基材广泛应用于最常见的光,电流,电位,电导等pH值传感系统;一些非响应性高分子材料既可作为传感器光纤,也可用于荧光染料的固定.重点介绍了pH敏感性高分子的响应机理即pH敏感性高分子如聚电解质,水凝胶,导电高分子,半导体高分子等对pH值变化具有体积,电导率,阻抗,电位,电流等响应,总结了聚合物基pH传感器在真实测量领域的应用并对聚合物基pH传感器今后的研究趋势进行了分析.关键词:pH传感器;pH敏感聚合物;响应原理;......
文章编号:1004-0609(2011)09-2175-07 快速共沉淀过程pH值对Ni0.8Co0.1Mn0.1(OH)2及LiNi0.8Co0.1Mn0.1O2性能的影响 王接喜, 李新海, 王志兴, 李灵均, 郭华军, 岳 鹏, 伍 凌 (中南大学 冶金科学与工程学院,长沙 410083) 摘 要:采用快速共沉淀法制备Ni0.8Co0.1Mn0.1(OH)2前驱体,利用前驱体与LiOH·H2O的高温固相反应得到锂离子电池层状正极材料LiNi0.8Co0.1Mn0.1O2,探讨pH值对材料结构和电化学性能的影响.通过X射线衍射(XRD),扫描电镜(SEM)和电化学测试对合成样品进行表征.结果表明,pH值为11.00~12.00时,合成的Ni0.8Co0.1Mn0.1(OH)2前驱体均无杂相;pH值为11.50时,合成的前驱体制备出的正极材料具有良好的电化学性能......
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工业pH的检测与调节蔡幼忠,倪小新北京有色冶金设计研究总院!北京100038北京普莱克斯气体公司!北京100022摘 要:叙述了 pH计的不同结构与优缺点 ,检测对象存在的非线性特性及非线性控制的实现 ,调节阀的选型等关键词:pH传感器;复合电极;差动电极;调节器;非线性控制;......
Trans. Nonferrous Met. Soc. China 25(2015) 3664-3677 Effect of pH value and calcination temperature on synthesis and characteristics of Cu-Ni nano-alloys María de los A. CANGIANO, Manuel W. OJEDA... July 2015 Abstract: Cu-Ni nano-alloys were prepared using precursors synthesized by the citrate-gel method. The effects of initial solution pH value and calcination temperature on the composition......
J. Cent. South Univ. Technol. (2009) 16: 0066-0072 DOI: 10.1007/s11771-009-0011-9 Synthesis and property of temperature and pH sensitive xanthan–MA/PNIPAAm hydrogels LONG Qing-de(隆清德), PAN Chun... of temperature as well as pH value. The magnitudes of smart and hydrogel properties of these hybrid hydrogels depend on the feed composition ratio of the two precursors. With the increase of the content......
Trans. Nonferrous Met. Soc. China 26(2016) 2220-2229 Effects of processing pH stimulation on cooperative bioleaching of chalcopyrite concentrate by free and attached cells Tang-jian PENG1, Li-juan... Received 3 May 2015; accepted 4 May 2016 Abstract: In order to investigate the effects of processing pH stimulation on bioleaching of chalcopyrite by moderate thermophiles, copper leaching rates......