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铝电解NiFe2O4基金属陶瓷惰性阳极性能研究进展 黄蔚1,赖延清2,李新征2,田忠良2 (1.丹江口铝业有限责任公司,丹江口,442700;2.中南大学冶金科学与工程学院,长沙,410083) 摘要:NiFe2O4基金属陶瓷是最具应用前景的铝电解惰性阳极材料,国内外对其性能与制备技术进行了大量研究.评述了NiFe2O4基金属陶瓷惰性阳极烧结性能,高温导电性能,耐腐蚀性能,高温抗氧化及抗热震性能的最新研究进展及存在的主要问题,探讨了惰性阳极材料的未来研究重点及发展趋势. 关键词:铝电解; 惰性阳极; NiFe2O4基金属陶瓷; 性能研究; [全文内容正在添加中] ......
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掺杂SnO2对NiFe2O4陶瓷电导率的影响 段华南1,赖延清1,孙小刚1,张刚1,田忠良1 (1.中南大学冶金科学与工程学院,湖南长沙,410083) 摘要:采用冷压-烧结粉末冶金技术制备了NiFe2O4陶瓷,并对其进行SnO2掺杂.对光谱纯石墨和所制备的试样进行的不同温度下电导率测试研究表明:用直流四端电极法改进的高温电导率测试仪测定结果重现性和准确性良好;NiFe2O4陶瓷材料的导电性能随着温度升高而提高,且呈现半导体材料特性;掺杂少量SnO2有利于降低材料的活化能,提高其电导率,而不影响陶瓷基体材料的半导体特性. 关键词:电导率; 掺杂SnO2; NiFe2O4陶瓷; 惰性阳极; [全文内容正在添加中] ......
were focused on alloy[5] and cermet[6-7]. Among them, NiFe2O4 based cermet is regarded as one of the potential materials because it has good electrical conductivity and ability to resist corrosion[7-8]. But the anticorrosion performance of NiFe2O4 based cermet still could not meet the requirement of inert anode for aluminum electrolysis. Therefore, in order to decrease corrosion rate of inert anode......
in TiC-20wt%Mo2C-20wt%Ni cermet[J]. Journal of Materials Research, 1999, 14(11): 4129-4131. [9] ZARIPOV N G, KABIROV R R, BLOSHENKO V N. Structural peculiarities of cermets design based on titanium carbide[J... Materials, 1993-1994, 12(3): 107-113. [13] KINOSHITA S, UEKI M, SUZUKI H. Cutting performance of titanium carbide based cermet nitrified during the course of sintering[J]. Journal of the Japan......
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is NiFe2O4-based cermet inert anode and the composition(mass fraction) is 17%Ni/83%(10NiO-90 NiFe2O4). Because the inert anode is immersed in the high-temperature electrolyte, great thermal stress... Gang, et al. Preparation of NiFe2O4-Cu based cermet inert anodes in aluminum electrolysis[J]. The Chinese Journal of Nonferrous Metals, 2003, 13(6): 1540-1545. (in Chinese) [10] JIAO Wan-li, ZHANG Lei......
金属Ag对NiFe2O4尖晶石性能的影响 席锦会1,刘宜汉1,姚广春1,张淑婷1 (1.东北大学,材料与冶金学院,辽宁,沈阳,110004) 摘要:制备了不同金属Ag含量的Ag-NiFe2O4金属陶瓷,利用扫描电子显微镜观察显微组织,由X射线衍射分析化学成分,研究了Ag的添加量对其体积密度,气孔率,热震性,导电率以及腐蚀速率的影响,试验结果表明,抗热震性和导电能力随着Ag含量的增加而增强,导电率的提高和腐蚀率的增大仍是一对突出的矛盾.单一通过添加金属Ag不可能使导电率和腐蚀率都满足要求. 关键词:NiFe2O4尖晶石; 金属陶瓷; 性能; 显微结构; [全文内容正在添加中] ......
Research on Wear Behavior of ATC Cermet Material WANG You-wen1,ZHU Liu2,LI Jian2,LING Guo-ping2 (1.Center of the analysis and measurement, Zhejiang University, Hangzhou, China;2.College... and TiC. The mixture of the two kinds of Co-coated power (about 70wt.%Al2O3-Co+30wt.%TiC-Co) was hot-pressed into ATC (Al2O3-TiC-Co8wt%) cermet samples. The wear test was carried out under dry sliding......
铝电解用NiO/Fe梯度功能电极的制备及其腐蚀行为姚同路1,林平1,秦庆伟2(1.北京市钢铁研究总院冶金工艺研究所2.武汉科技大学 材料与冶金学院,武汉 430081)摘 要:采用传统粉末冶金技术制备铝电解用NiO/Fe金属陶瓷惰性阳极,并研究其在Na3AlF6-Al2O3熔体中的腐蚀行为.结果表明,金属Ni与NiO陶瓷的润湿性能较好,NiO/Fe金属陶瓷的致密化容易实现,表现出相对好的耐蚀性.当分子比=2.3和氧化铝浓度近饱和时电极腐蚀率最小.关键词:复合材料; 梯度功能材料; 铝电解; 惰性阳......