(東北大學(xué) 材料與冶金學(xué)院，沈陽(yáng) 110004)
摘 要: 以高溫固相合成法，采用兩步燒結(jié)法制備鍍銅碳纖維增強(qiáng)的纖維/NiFe2O4復(fù)合陶瓷惰性陽(yáng)極，即先以NiO、Fe2O3、微量V2O5和MnO2為原料制備N(xiāo)iFe2O4尖晶石基體材料，然后以該NiFe2O4尖晶石基體材料和鍍銅碳纖維為原料，采用冷壓燒結(jié)法制備纖維/NiFe2O4復(fù)合陶瓷惰性陽(yáng)極。研究鍍銅碳纖維添加量對(duì)NiFe2O4復(fù)合陶瓷惰性陽(yáng)極體積密度、氣孔率和抗彎強(qiáng)度的影響。結(jié)果表明：添加鍍銅碳纖維可以顯著改善NiFe2O4復(fù)合陶瓷材料的性能，當(dāng)鍍銅碳纖維添加量為3%(質(zhì)量分?jǐn)?shù))時(shí)，其體積密度比不添加鍍銅碳纖維試樣的體積密度提高約12%，其抗彎強(qiáng)度比不添加鍍銅碳纖維的提高約22%。
關(guān)鍵字: 纖維/NiFe2O4復(fù)合陶瓷；惰性陽(yáng)極；鍍銅碳纖維；兩步燒結(jié)；體積密度；抗彎強(qiáng)度
fiber/NiFe2O4 composite ceramic inert anodes
（School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract:Two-step sintering process was adopted to prepare fiber/NiFe2O4 composite ceramic inert anodes with copper-coated carbon fiber by solid-state reaction. NiFe2O4 spinel matrix material was prepared first using NiO, Fe2O3, trace V2O5 and MnO2 as raw materials. Then, fiber/NiFe2O4 composite ceramic inert anodes were prepared by cold pressing with sintering method using the above NiFe2O4 spinel matrix material and copper-coated carbon fiber as raw materials. The effects of addition of copper-coated carbon fiber on the bulk density, porosity and bending strength were studied. The results show that, the addition of copper-coated carbon fiber can significantly improve the properties of NiFe2O4 composite ceramic. The bulk density of the samples is improved by about 12% and the bending strength of samples is improved by about 22% with 3%(mass fraction) copper-coated carbon fiber.
Key words: fiber/NiFe2O4 composite ceramic; inert anodes; copper-coated carbon fiber; two-step sintering; bulk density; bending strength
