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通过溶胶凝胶 (Sol gel)法经涂刷、烧结、退火等工艺制备了添加不同含量SnO2 的RuO2 +SnO2 +TiO2 /Ti三元涂层钛阳极。并通过X射线衍射 (XRD)、差热分析 (DTA)、透射电子显微 (TEM )分析了SnO2 组元对RuO2+TiO2 +SnO2 /Ti阳极涂层组织、晶粒尺寸和外观形貌的影响。结果表明 ,所获三元涂层颗粒尺寸细小 ,均为纳米结构 ,且添加SnO2 组元后有显著细化涂层晶粒的效果。在不同退火温度下 ,随SnO2 含量的增加 ,涂层晶粒均能发生一定程度的细化。所获三元阳极涂层主要组成物相为金红石 (Ru ,Sn ,Ti)O2 固溶体 ,SnO2 组元含量较高的涂层出现不同成分金红石相共存的现象 ;当涂层退火温度由 45 0℃升高至 6 0 0℃后 ,SnO2 组元不能阻止 (Ru ,Sn ,Ti)O2 固溶体脱溶分解 ,并析出六方晶系Ru单质 ;添加SnO2 组元的RuO2 +SnO2 +TiO2 涂层晶粒外观呈较理想等轴状特征
The RuO2 + SnO2 + TiO2 / Ti ternary coated titanium anodes with different content of SnO2 were prepared by sol-gel method, brushing, sintering and annealing. The effects of SnO2 on the microstructure, grain size and morphology of RuO2 + TiO2 + SnO2 / Ti anode coatings were analyzed by XRD, DTA and TEM. . The results show that the obtained ternary coating particles are small in size and nano-structure, and the addition of SnO 2 has the effect of significantly refining the coating grain. At different annealing temperature, with the increase of SnO2 content, the coating grains can be refined to a certain extent. The main composition of the obtained ternary anode coating was rutile (Ru, Sn, Ti) O2 solid solution. The coating with higher SnO2 content coexisted with the rutile phase. When the annealing temperature was increased from 45 0 ℃ After the temperature was raised to 600 ℃, the SnO2 component could not prevent the (Ru, Sn, Ti) O2 solid solution from dissolving and decomposing and precipitated hexagonal Ru. The grain appearance of RuO2 + SnO2 + TiO2 coating with SnO2 component added Was ideal equiaxed features