期刊文献+

NiFe_2O_4基金属陶瓷材料的制备及其耐腐蚀性能 被引量:13

Materials Fabrication and Corrosion Behavior ofNiFe_2O_4 Cermet Inert Anodes
下载PDF
导出
摘要 采用传统粉末冶金技术制备了铝电解用Cu NiFe2O4和Ni NiFe2O4金属陶瓷惰性阳极,并对其在Na3AlF6 Al2O3熔体中的腐蚀行为进行了研究。研究结果表明:NiFe2O4基金属陶瓷阳极的腐蚀行为与热力学计算结果吻合;金属Cu与NiFe2O4陶瓷的润湿性能不好,Cu NiFe2O4金属陶瓷的致密化和导电性能难以提高;致密度过低时,会导致金属相高温氧化和电解质浸渗,电极肿胀、开裂;在电解过程中,5%Cu NiFe2O4存在金属相聚集和在陶瓷基体中Fe优先溶解的现象,但金属铜并未发生阳极溶解;5%Ni NiFe2O4金属陶瓷易实现致密化烧结,在电解过程中表现出良好的耐腐蚀性能,会发生金属Ni的阳极溶解,并存在陶瓷基体中铁优先溶解的现象。 The cermet inert anodes with the compositions of Cu-NiFe_2O_4 and Ni-NiFe_2O_4 were developed by classical powder metallurgical technique respectively. The corrosion behaviors of NiFe_2O_4-based inert anodes in Na_3AlF_6-Al_2O_3 melts were investigated. The results show that the corrosion behavior of cermet materials is consistent with thermodynamic calculations. To improve densification and electrical conductivity are difficult because copper has poor wetting characteristics to NiFe_2O_4 phase. The relative high porosity can lead to the oxidation of metals in Cu-NiFe_2O_4 cermets and electrolyte penetration into the anodes. The anode was badly swollen at the end of testing. The materials do not degrade during electrolysis via anodic dissolution of copper phase. Preliminary testing of 5%Ni-NiFe_2O_4 cermet materials show that the anodes have excellent performance in cryolite-based melts. Nickel has the tendency to anodic dissolve and ferrite has the tendency of incongruent dissolution.
出处 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2004年第6期885-890,共6页 Journal of Central South University:Science and Technology
基金 国家自然科学基金资助项目(50204014) 国家重点基础研究发展规划项目(G1999064903) 国家高技术研究发展计划项目(2001AA335013)
关键词 铝电解 惰性阳极 腐蚀 金属陶瓷 NIFE2O4 aluminum electrolysis inert anode corrosion cermet NiFe_2O_4
  • 相关文献

参考文献11

  • 1KVANDE H. Inert Electrodes in Aluminium Electrolysis Cells [A]. ECKERT E C. Proceedings of the Technical Sessions Presented by the TMS Aluminum Committee at the 128thTMS Annual Meeting [C]. San Diego: The Minerals, Metals & Materials Society, 1999. 369 -376.
  • 2de NORA V. Aluminium Electrowinning the Future [J]. Aluminium, 2000, 76(12): 998-999.
  • 3KVANDE H, THONSTAD J. Inert Anodes-an Update [A].Eleventh International aluminium Symposium [C]. SlovakNorwegian: Symposium on Aluminium Electrowinning, 2001.161 - 170.
  • 4THONSTAD J, FELLNER P, HAARBERG G M, et al.Aluminium Electrolysis (3rd ed): Fundamentals of the Hall Heroult process [M]. Dusseldorf: Aluminium-Verlag Marketing & Kommunikation Gmbh, 2001.
  • 5de NORA Vittorio. VERONICA and TINOR 2000 New Technologies for Aluminum Production [J]. Interface, 2002, 11(4): 20-24.
  • 6PAWLEK R P. Inert Anodes: An Update [A]. SCHNEIDER W. Proceedings of the Technical Sessions Presented by the TMS Aluminum Committee at the 131st TMS Annual Meeting [C]. Washington: The Minerals, Metals & Materials Society, 2002. 449 - 456.
  • 7WELCH B J, HYLAND M M, JAMES B J. Future Materials Requirements for the High-Energy-Intensity Production of Aluminum[J]. JOM, 2001, 53(2): 13 - 18.
  • 8SADOWAY D R. Inert Anode for the Hall-Heroult Cell: The Ultimate Materials Challenge [J]. JOM, 2001, 53 (5): 34 -35.
  • 9ALCORN T R, TABEREAUX A T, RICHARDS N E, et al. Operational Results of Pilot Cell Test with Cermet "Inert" Anodes [A]. DAS S K. Proceedings of the Technical Sessions Presented by the TMS Light Metals Committee at the 122nd TMS Annual Meeting [C]. Colorado: The Minerals, Metals & Materials Society, 1993. 433 - 443.
  • 10WINDISCH C F J, STRACHAN D M, HENAGER C H J,et al. Materials Characterization of Cermet Anodes Tested in a Pilot Cell [A]. DAS S K. Proceedings of the Technical Sessions Presented by the TMS Light Metals Committee at the 122nd TMS Annual Meeting [C]. Colorado: The Minerals,Metals & Materials Society, 1993. 445 - 454.

同被引文献115

引证文献13

二级引证文献30

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部