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铁酸镍基金属陶瓷惰性阳极材料的研究进展 总被引:1,自引:0,他引:1
惰性阳极铝电解技术的发展主要基于经济和环境的考虑,对铝电解工业的长远发展具有重要意义,已成为铝电解工业进步的关键技术。合金惰性阳极具有易加工成形、良好的抗热震性和导电性,金属陶瓷惰性阳极兼顾陶瓷的高温热稳定性及金属的高导电性和高韧性,二者已成为惰性阳极的主要候选材料体系,并进行了工程化铝电解试验研究。近年来,惰性阳极的研究集中在合金阳极表面保护膜形成与溶解的动态平衡控制、金属陶瓷组成与结构优化、惰性阳极的电解腐蚀机制及抑制技术等方面。综述了铝电解用合金阳极和金属陶瓷惰性阳极的近期研究进展,从材料学的角度介绍铁酸镍基金属陶瓷的组成优化、烧结、电解腐蚀特性等方面的最新研究成果。 相似文献
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铝电解惰性阳极研究现状 总被引:9,自引:3,他引:9
惰性阳极是铝工业新技术的一个重要课题,本文对近年来铝电解阳极材料多已集中在金属、金属陶瓷、氧化物陶瓷和氧化铈涂层几个方面的现状及研究进展分别加以介绍。指出铝电解惰性阳极的研制一开始就遇到的问题,如氧化,腐蚀,产出铝受惰性阳极材料的污染,阳极寿命,导电性和成本问题仍未完全解决。 相似文献
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对于铝电解惰性阳极的选材与研究方向的思考 总被引:4,自引:0,他引:4
本文简要介绍了国际上铝电解惰性阳极方面较有影响的研究工作,以及国内在此领域的研究状况。对惰性阳极材料的选择问题进行较深入的探讨,分析了陶瓷、金属和金属陶瓷材料在隋性阳极研究应用中所出现的问题,并对惰性阳极未来的研究发展方向提出了一些建议。 相似文献
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采用BP神经网络对铝电解NiFe2O4基金属陶瓷惰性阳极的电解腐蚀过程进行了系统辨识。建立了以Al2O3质量浓度、电解温度、分子比、面积比和电流密度为输入,腐蚀率为输出的网络模型。在材料的设计中,采用了GA-BP优化方法,BP网络参与GA迭代计算时对个体的评价。应用结果表明,NiFe2O4基金属陶瓷惰性阳极的电解腐蚀率预测结果与实测值吻合;优化设计的结果与实验值很接近。 相似文献
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铝电解惰性阳极用Ni-Zn铁氧体的固态合成 总被引:6,自引:2,他引:6
采用固态合成法分别在惰性气氛和空气下,制备不同成分的Ni(l-x)ZnxFe2O4铁氧体尖晶石。对反应产物的物相、粒度和形貌的检测表明:在Ar气保护下煅烧主要发生氧化物的离解反应,反应物无法得到目标物相;采用反应烧结法制备铝电解金属陶瓷惰性阳极时,须保持一定的氧分压,以避免金属氧化物的离解和金属相的氧化;在空气中,通过固态反应可制备出理想的铝电解惰性阳极用Ni(l-x)ZnxFe2O4尖晶石,其粒度细,且符合标准正态分布,烧结温度低,在1150℃下保温6h即实现完全反应。 相似文献
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Zhong-Liang Tian Yan-Qing Lai Zhiyou Li Jie Li Kecao Zhou Yexiang Liu 《JOM Journal of the Minerals, Metals and Materials Society》2009,61(5):34-38
Application of inert anode and wet-table cathode technology for aluminum reduction will result in significant energy and environmental
benefits, so it has been a research focus for several decades. The candidate as inert anode concentrates on oxide ceramic,
cermet, and alloy. This paper reviews briefly the research progress and presents the achievements of Central South University,
Changsha, China, in developing an NiFe2O4-based cermet inert anode, which includes the preparation and optimization of material performance, the joint between the
cermet anode and metallic bar, as well as the results of electrolysis testing for a large inert anode group. At the same time,
the problems for NiFe2O4-based cermet inert anode faced are discussed. 相似文献
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ZhongLiang Tian YanQing Lai ZhiYou Li DengPeng Chai Jie Li YeXiang Liu 《JOM Journal of the Minerals, Metals and Materials Society》2014,66(11):2229-2234
The new aluminum electrolysis technology based on inert electrodes has received much interest for several decades because of the environment and energy advantages. The key to realize this technique is the inert anode. This article presents China’s recent developments of NiFe2O4-based cermet inert anodes, which include the optimization of material performance, the joint between the cermet inert anode and metallic bar, as well as the results of 20 kA pilot testing for a large-size inert anode group. The problems NiFe2O4-based cermet inert anodes face are also discussed. 相似文献
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1 Introduction It is well known that the current aluminum reduction cell with carbon consumable anode has many disadvantages. So the concept of inert anode was introduced, with which the disadvantages can be avoided completely. A lot of research work has… 相似文献
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J. Li Q.S. Zhang Y.Q. Lai S.L. Ye Y.X. Liu 《金属学报(英文版)》2005,18(5):635-641
The thermal stresses relaxation of Ni/NiFe2O4 system functionally graded cermet inert anode for aluminum electrolysis was optimally designed. The transient thermal stresses of the inert anode under complex boundary condition during high-temp (955℃) electrolysis were calculated using the finite-element software ANSYS, the influence of different parameters on the distribution of the thermal stresses were analyzed. The results showed that, during the process of thermal shock, the thermal hoop tensile stress on the surface of the anode is very large, which is possibly the major cause of anode crack; when the radius of the anode is between 0.05-0.15m, a range that can be realized by recent manufacturing technology, the optimum composition distribution exponent p is 0.25; The hoop tensile stresses reduce with the decrease of anode scale and also decrease with the decrease of the convection coefficient between the electrolyte and the anode. 相似文献
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针对铝电解用金属陶瓷惰性阳极材料与金属导杆的电连接困难问题,以Al(H2PO4)3为胶粘剂,CuO为固化剂,NiFe2O4陶瓷粉和Cu-Ag合金粉为填充料,连接NiFe2O4基金属陶瓷.通过分析Al(H2PO4)3与CuO的反应过程,观察磷酸盐连接NiFe2O4基金属陶瓷的界面形貌,探索其高温连接机理.结果表明:Al(H2PO4)3与CuO反应后生成的Cu-P-O化合物是主要连接物相;Cu-P-O化合物随温度的变化逐步发生一系列物相变化,并在960~1 000℃下逐步分解为CuO和P2O5;在不同热处理温度下,磷酸盐与NiFe2O4基金属陶瓷连接界面始终保持紧密结合状态:低温下连接层与金属陶瓷润湿性良好并依靠吸附作用相互连接,高温下连接层与金属陶瓷依靠互扩散作用相互连接. 相似文献