(1. 安徽工業(yè)大學(xué) 冶金與資源學(xué)院，馬鞍山 243002；2. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110819)
摘 要: 以NiO和Fe2O3為原料采用固相燒結(jié)法合成NiFe2O4尖晶石，通過向其中添加短纖維制備纖維/NiFe2O4惰性陽極材料。為選擇適合于NiFe2O4基惰性陽極材料的纖維增強(qiáng)體，對幾種纖維在NiFe2O4基體中的高溫穩(wěn)定性進(jìn)行考察。結(jié)果表明，高溫下碳纖維、玻璃纖維、氧化鋁纖維和碳化硅纖維與NiFe2O4基體是熱力學(xué)不相容的； 1 200 ℃時鍍鎳碳纖維和鎳?yán)w維不能在基體中穩(wěn)定存在；1 400 ℃時ZrO2(f)與NiFe2O4基體具有良好的物理和化學(xué)相容性，添加3% ZrO2(f) (質(zhì)量分?jǐn)?shù))陽極試樣的力學(xué)性能得到明顯改善。因此，ZrO2(f)可作為NiFe2O4基惰性陽極的纖維增強(qiáng)體。
關(guān)鍵字: 鋁電解；NiFe2O4；纖維；惰性陽極；穩(wěn)定性；強(qiáng)韌化
（1. School of Metallurgy and Resources, Anhui University of Technology, Maanshan 243002, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:NiFe2O4 spinel was synthesized via solid-state sintering technology using NiO and Fe2O3 as the raw materials, and fiber/NiFe2O4 inert anode materials were prepared by adding short fiber into NiFe2O4. The high temperature stability of some fibers in NiFe2O4 matrix was investigated to select the appropriate fiber reinforcement for NiFe2O4-based inert anode materials. The results indicate that carbon fiber, glass fiber, alumina fiber and silicon carbide fiber are thermodynamically incompatible with the NiFe2O4 matrix, also the nickel-coated carbon fiber and nickel fiber cannot stably exist in the matrix at 1 200 ℃, while ZrO2(f) has favorable physical and chemical compatibility with the NiFe2O4 matrix at 1 400 ℃. The mechanical properties of the anodes samples are improved significantly by adding 3% ZrO2(f) (mass fraction). Therefore, ZrO2(f) can be used as the fiber reinforcement for NiFe2O4-based inert anode.
Key words: alumimum electrolysis; NiFe2O4; fiber; inert anode; stability; strengthening and toughening
