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采用热压方法研制了Al Ni Cu O系金属陶瓷惰性阳极 ,阳极的成分以NiAl2 O4尖晶石陶瓷为基体 ,含有 10 %~ 2 0 % (wt)Cu和Ni的混合粉末 ,制得阳极试样的相对密度可达 99% ,该种阳极在 90 0℃左右的电导率大于 80s/cm。采用自制的Ф15 0mm× 12mm阳极 ,在 15 0A电流的情况下稳定电解 2 4h ,对阳极的动态腐蚀行为进行研究。对电解后阳极的XRD研究发现 ,从阳极中心到表面NiO量逐渐增加 ,在阳极表面有新的NiO相生成 ,对比阳极中不同相的热膨胀性能 ,认为新相的生成导致了阳极的膨胀和分层。
Al Ni Cu O cermet inert anode was fabricated by hot pressing method. The composition of the anode was NiAl 2 O 4 spinel ceramic with 10% ~ 20% (wt) Cu and Ni as mixed powders. The relative density of up to 99%, the kind of anode 90 0 ℃ conductivity greater than 80s / cm. The self-made Ф15 0mm × 12mm anode was used to stabilize the electrolysis at a current of 15 A for 24 hours. The dynamic corrosion behavior of the anode was investigated. XRD study of the anode after electrolysis found that NiO gradually increased from the center of the anode to the surface, a new NiO phase was formed on the surface of the anode. Contrasting the thermal expansion of different phases in the anode, it was considered that the formation of a new phase led to the expansion and fractionation of the anode Floor.