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利用Factsage热力学软件预测分析了高温下典型氧化物分别与氟化物AlF3、Na3AlF6及K3AlF6之间的化学反应,并采用氧化物粉末与电解质混合和氧化物烧结体浸泡两种实验方法验证了900℃时氧化物与电解质的反应.采用X射线衍射仪及扫描电子显微镜等分析了试样的物相组成和显微结构.结果表明:主族元素氧化物普遍比过渡元素氧化物易于和含AlF3、Na3AlF6及K3AlF6的电解质反应;并且CaO· 6Al2O3、MgAl2O4、Mg2TiO4、Al2TiO5、NiFe2O4与AlF3、Na3AlF6及K3AlF6电解质反应程度依次减弱;基于浸泡实验发现,降低烧结试样的显气孔率能有效提高其抗电解质侵蚀性能.

参考文献

[1] G. Brooks;M. Cooksey;G. Wellwood .Challenges in light metals production[J].Mineral Processing and Extractive Metallurgy Review,2007(1):25-33.
[2] Wang Z;Skybakmoen E;Grande T.Spent Si3N1 bonded SiC sidelining materials in aluminium electrolysis cells[A].Warrendale:TMS,2009:353.
[3] Sonntag A .New R-SiC extends service life in kiln furniture[J].American Ceramic Society Bulletin,1997,76(11):51.
[4] Koji Takahashi;Hisashi Murase;Shoko Yoshida .Improvement of static fatigue strength of Si_3N_4/SiC crack-healed under cyclic stress[J].Journal of the European Ceramic Society,2005(11):1953-1959.
[5] M. D. PUGH;L.GAVORET .Nitridation of whisker-reinforced reaction bonded silicon nitride ceramics[J].Journal of Materials Science,2000(13):3257-3262.
[6] Kvande H;Haupin W .Inert anode for aluminium smelter:Energy balances and environment impact[J].J Miner Met Mater Soc,2001,53(02):29.
[7] Hangen E;Einarsrud M;Grande T.Chemical stability of ceramic sidelinings in Hall-Heroult cells[A].Warrendale:TMS,2001:257.
[8] Yan X Y;Mukhlis R Z;Rhamdhani M A.Aluminate spinels as sidewall linings for aluminum smelters[A].Warrendale:TMS,2011:1085.
[9] Yu X J;Zhang L P;Dong Y H et al.Corrosion of zinc ferrite based inert anodes in AlF3-NaF-Al2O3 melts under conditions of anodic polarization[J].Journal of Rare Earths,2006,24(01):352.
[10] Yan X Y;Pownceby M I;Brooks G.Corrosion behavior of nickel ferrite-based ceramics for aluminum electrolysis cells[A].Warrendale:TMS,2007:909.
[11] Kato E;Damon K;Takahashi J .Decomposition temperature of β-Al2TiO5[J].Journal of the American Ceramic Society,1980,63(5-6):355.
[12] Lejus A M;Goldberg D;Rercolerschi A .New compounds formed between rutile-TiO2 and oxides of trivalent and quadric-valent metals[J].Comptes Rendus Hebdomadaires des séances de l'Académie des Sciences,1966,263:111223.
[13] Ritiwik S;Das S K;Banerjee G .Effect of additives on the densification of reaction sintered and presynthesized spinels[J].Ceramics International,2003,29(01):55.
[14] Lee YB.;Oh KD.;Riley FL.;Park HC. .Sintering and microstructure development in the system MgO-TiO2[J].Journal of Materials Science,1998(17):4321-4325.
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