Abstract
A two-step powder compaction and sintering process was employed to fabricate TiO2-doped NiFe2O4 ceramic-based inert anodes. Grain growth during isothermal sintering was analyzed using Brook grain growth model. The bubble behavior of NiFe2O4 ceramic-based inert anodes was investigated in a two-compartment see-through quartz cell for aluminum electrolysis process. Anodic overvoltage and potential decay curves of the inert anodes were measured by using the steady state and current interruption technique. The results showed that the kinetic index of grain growth decreased with an increase in temperature. The average activation energy of grain growth for 1.0 wt.% TiO2-doped NiFe2O4 ceramic samples with a sintering temperature range from 1373 to 1673 K dropped from 675.30 to 183.47 kJ/mol. The diameter size of bubbles before releasing from the bottom surface of the anodes was reduced with increasing the current density, and the larger average releasing bubble size for carbon anode at the same current density could be obtained, which was compared to the NiFe2O4 inert anodes. Besides, the cell voltage of carbon anodes fluctuated much more violently under the same experimental conditions. After adding small amount of TiO2, a minor reduction in anodic overvoltage of NiFe2O4-based anodes can be observed.
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Y.Q. Lai, Y. Zhang, Z.L. Tian, X.G. Sun, G. Zhang, and J. Li, Effect of Adding Methods of Metallic Phase on Microstructure and Thermal Shock Resistance of Ni/(90NiFe2O4-10NiO) Cermets, Trans. Nonferrous Metals Soc. China, 2007, 17, p 681–685
J. Keniry, The Economics of Inert Anodes and Wettable Cathodes for Aluminum Reduction Cells, JOM, 2001, 53(5), p 43–47
L. John Berchmans, R.K. Selvan, and C.O. Augustin, Evaluation of Mg2+-Substituted NiFe2O4 as a Green Anode Material, Mater. Lett., 2004, 58, p 1928–1933
J. Ma, G.C. Yao, L. Bao, X. Zhang, and J.F. Ma, Research on Preparation and Properties of 18NiO-NiFe2O4 Composite Ceramic Inert Anodes, in Light Metals 2010—Proceedings of the Technical Sessions Presented at the TMS 2010 Annual Meeting and Exhibition, TMS Aluminum Committee, 2010, p 949–952
J. Thonstad, P. Fellner, G.M. Haarberg, J. Hives, H. Kvande, and A. Sterten, Aluminium Electrolysis-Fundamentals of the Hall-Heroult (3rd edition) MI, Aluminium-Verlag, Düsseldorf, 2001, p 328–338
J.H. Yang, Y.X. Liu, and H.H. Wang, The Behaviour and Improvement of SnO2-Based Inert Anodes in Aluminium Electrolysis. DAS SK. Light Metals, 1993[C]. Wmendale PA: TMS, 1993, p 493–495
S.P. Ray, Inert Anodes for Hall Cells, TMS, Warrendale, 1986, p 287–298
X.H. Cao, J.H. Meng, F. Mi, Z.H. Zhang, and J. Sun, Preparation and Magnetic Property Investigation of a Nickel Spinel Ferrite-Coated Tetrapod-Like ZnO Composite, Solid State Commun., 2011, 151(9), p 678–682
J.H. Xi, Y.H. Liu, and G.C. Yao, Effect of Technological Conditions on Properties of Inert Anodes of Ag/NiFe2O4 Cermet, Mater. Sci. Technol., 2008, 16(1), p 41–44 (in Chinese)
J. Ma, G.C Yao, L. Bao, X. Zhang, and J.F. Ma, Effect of Sintering Parameters on Properties of 18NiO-17(Cu-Ni)-65NiFe2O4 Composite Ceramic Anode, in Light Metals 2010—Proceedings of the Technical Sessions Presented at the TMS 2010 Annual Meeting and Exhibition, TMS Aluminum Committee, 2010, p 945–948
L.M. Zhang, X.H. Huang, and X.L. Song, Materials Science Fundamentals, Wuhan University of Technology Press, Wuhan, 2008 (in Chinese)
D.W. Ready, Mass Transport and Sintering in Impure Ionic Solids, J. Am. Ceram. Soc., 1966, 49(7), p 366–369
H.B. He, K.C. Zhou, Z.Y. Li, and B.Y. Huang, Effect of BaO Addition on Electric Conductivity of xCu/10NiO-NiFe2O4 Cermets, Trans. Nonferrous Metals Soc. China, 2008, 18, p 1134–1138
H.B. He, H.N. Xiao, and K.C. Zhou, Effect of Additive BaO on Corrosion Resistance of xCu/(10NiO-NiFe2O4) Cermet Inert Anodes for Aluminum Electrolysis, Trans. Nonferrous Metals Soc. China, 2011, 21, p 102–108
J.H. Xi, Y.J. Xie, G.C. Yao, and Y.H. Liu, Effect of Additive on Corrosion Resistance of NiFe2O4 Ceramics as Inert Anodes, Trans. Nonferrous Metals Soc. China, 2008, 18, p 356–360
X.P. Gan, Z.Y. Li, Z.Q. Tan, and K.C. Zhou, Influence of Yb2O3 Addition on Microstructure and Corrosion Resistance of 10Cu/(10NiO-NiFe2O4) Cermets, Trans. Nonferrous Metals Soc. China, 2009, 19, p 1514–1519
J. Ma, L. Bao, G.C. Yao, Y.H. Liu, X. Zhang, Z.G. Zhang, and L.S. Liang, Effect of MnO2 Addition on Properties of NiFe2O4-Based Cermets, Ceram. Int., 2011, 37, p 3381–3387
J.J. Du, Y.H. Liu, G.C. Yao, X.L. Long, G.Y. Zu, and J. Ma, Influence of MnO2 on the Sintering Behavior and Magnetic Properties of NiFe2O4 Ferrite Ceramics, J. Alloys Compd., 2012, 510, p 87–91
Q.Q. Lin, T. Jiang, S. Zhao, and Y.P. Long, High Temperature Oxidation Resistance of 17Ni/(10NiO-NiFe2O4) Cermet with TiO2, J. Funct. Mater., 2014, 45(17), p 17079–17082 (in Chinese)
M. Coster, X. Arnould, J.L. Chermant, L. Chermant, and T. Chartier, The Use of Image Analysis for Sintering Investigations: The Example of CeO2 Doped with TiO2, J. Eur. Ceram. Soc., 2005, 25, p 3427–3435
R. Sarkar and G. Bannerjee, Effect of Addition of TiO2 on Reaction Sintered MgO-Al2O3 Spinels, J. Eur. Ceram. Soc., 2000, 20(12), p 2133–2141
D. Makovec, I. Pribošič, and M. Drofenik, TiO2 as a Sintering Additive for KNbO3 Ceramics, Ceram. Int., 2008, 34, p 89–94
N.X. Feng, Aluminium Electrolysis, Chemical Industry Press, Beijing, 2006 (in Chinese)
N.X. Feng and M.J. Zhang, Influence of Lithium Carbonate Addition to Carbon Anodes in a Laboratory Aluminium Electrolysis Cell, Carbon, 1991, 29(1), p 39–42
B. Wang, J.J. Du, Y.H. Liu, G.C. Yao, Z. Fang, and J. Yu, Effect of TiO2 Doping on the Sintering Process, Mechanical and Magnetic Properties of NiFe2O4 Ferrite Ceramics, Int. J. Appl. Ceram. Technol., 2015, 12(3), p 658–664
T.S. Zhang, P. Hing, and H.T. Huang, Early-Stage Sintering Mechanisms of Fe-Doped CeO2, J. Mater. Sci., 2002, 37, p 997–1003
R.J. Brook, Ceramic Fabrication Processes, Academic Press, New York, 1976, p 331–364
G.S.A.M. Theunissen, A.J.A. Winnubst, and A.J. Burggraaf, Effect of Dopants on the Sintering Behaviour and Stability of Tetragonal Zirconia Ceramics, J. Eur. Ceram. Soc., 1992, 9(8), p 251–263
R.P. Gao, X.G. Li, J.L. Shi et al., Physics and Chemistry Principle Technology of Advanced Ceramics, Science Press, Beijing, 2001 (in Chinese)
M.H. Khedr, M.S. Sobhy, and A. Tawfik, Physicochemical Properties of Solid–Solid Interactions in Nanosized NiO-Substituted Fe2O3/TiO2 System at 1200 °C, Mater. Res. Bull., 2007, 42, p 213–220
Y.L. Wang, J. Tie, G.F. Tu et al., Effect of Gas Bubble on Cell Voltage Oscillations Based on Equivalent Circuit Simulation in Aluminum Electrolysis Cell, Trans. Nonferrous Metals Soc. China, 2015, 25, p 335–344
L. Cassayre, T.A. Utigard, and S. Bouvet, Visualizing Gas Evolution on Graphite and Oxygen-Evolving Anodes, JOM, 2002, 54(5), p 41–45
Acknowledgments
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51504177; 51404183; 51574191; 51404181), Foundation of Shaanxi Educational Committee (No. 14JK1425) and Talent Foundation of Xi’an University of Architecture and Technology (RC1359). The authors also thank for Professor Guangchun Yao and Zhaowen Wang, Northeastern University, for detailed guidance and utilizing the research facilities available in see-through electrolysis cell and electrochemical workstation, respectively.
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Wang, B., Du, J., Liu, Y. et al. Effect of TiO2 Addition on Grain Growth, Anodic Bubble Evolution and Anodic Overvoltage of NiFe2O4-Based Composite Inert Anodes. J. of Materi Eng and Perform 26, 5610–5619 (2017). https://doi.org/10.1007/s11665-017-3006-y
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DOI: https://doi.org/10.1007/s11665-017-3006-y