铝电解惰性阳极材料研究新进展

惰性阳极由于存在许多的优点，一直是铝工业界关注的热点。本文论述了铝电解中使用惰性阳极的意义和对惰性阳极提出的要求。综述了国内外近年来在惰性阳极方面所做的研究，包括金属氧化物陶瓷阳极、合金阳极、金属陶瓷阳极。主要介绍了近年来研究比较多的金属陶瓷阳极的研究进展，阐述了各种阳极仍存在的问题。     

过渡金属盐掺杂聚苯胺材料及电容行为研究

采用化学聚合法制备出盐酸掺杂聚苯胺,去掺杂后分别在ZnCl2丙酮溶液和FeCl3丙酮溶液中再掺杂,制得ZnCl2掺杂聚苯胺材料(PZn)和FeCl3掺杂聚苯胺材料(PFe).用直流电导率仪,扫描电镜(SEM)和红外光谱(FT-IR)对掺杂聚苯胺进行了表征.以1mol/L H2SO4为电解液组装两电极超级电容器,研究了材...     

渗流铸造法制备的开孔泡沫铝的声学性能

采用反重力渗流铸造法成功制备了开孔泡沫铝材料,对比研究反重力渗流铸造和传统真空渗流法制备的开孔泡沫铝的声学性能。结果表明:两种方法所制备的泡沫铝在高频段的吸声系数均高于低频段的,且在低频段的吸声系数差别不大;在高频段,反重力渗流铸造所得材料的吸声系数明显优于传统真空渗流法所制备材料的,原因是反重力渗流法使泡沫铝中相邻孔洞的连通空间减小;在反重力渗流铸造制备的开孔泡沫铝材料中,造孔粒子粒径与平均吸声系数成反比,孔隙率与平均吸声系数成正比,增大泡沫铝的厚度有利于提高其吸声性能。     

Influence of KOH activation techniques on pore structure and electrochemical property of carbon electrode materials

1 INTRODUCTIONSupercapacitor is a kind of newenergy storagedevice , which can fill the gap between the conven-tional capacitor and the battery[1 ,2]. Supercapa-ciors are nowutilizedin many fields ,such as spaceindustry ,national defense ,warindustry ,electricalvehicle , wireless communication, and consume e-lectronics .It is well known that the electrode ma-terial is the key factor to determine the perform-ance of supercapacitor . At present ,the activatedcarbonis the main marketed availa…     

Effect of sintering atmosphere on composition and properties of NiFe2O4 ceramic

Ni Fe2O4 ceramics were prepared in different sintering atmospheres. The phase compositions, microstructures and mechanical properties were studied. The results show that the stoichiometric compound Ni Fe2O4 cannot be obtained in vacuum or atmospheres with oxygen contents of 2×10-5, 2×10-4 and 2×10-3, respectively. All the samples sintered in above-mentioned atmospheres contain phases of Ni Fe2O4 and Ni O. With increasing oxygen content, Ni Fe2O4 content in the ceramic increases, while Ni O content appears a contrary trend. In vacuum, Ni Fe2O4 ceramic has average grain size of 3.94 μm, and bending strength of85.12 MPa. The changes of the phase composition and mechanical properties of Ni Fe2O4 based cermets are mainly caused by the alteration of their properties of Ni Fe2O4 ceramic.