鈦陽極組織形貌的影響
(1. 西安交通大學(xué) 材料科學(xué)與工程系，西安 710049;
2. 福州大學(xué) 材料研究所, 福州 350002)
摘 要: 通過溶膠凝膠（Sol-gel）法經(jīng)涂刷、燒結(jié)、退火等工藝制備了添加不同含量SnO2的RuO2+SnO2+TiO2/Ti三元涂層鈦陽極。并通過X射線衍射（XRD）、差熱分析（DTA）、透射電子顯微（TEM）分析了SnO2組元對RuO2+TiO2+SnO2/Ti陽極涂層組織、晶粒尺寸和外觀形貌的影響。結(jié)果表明，所獲三元涂層顆粒尺寸細(xì)小，均為納米結(jié)構(gòu)，且添加SnO2組元后有顯著細(xì)化涂層晶粒的效果。在不同退火溫度下，隨SnO2含量的增加，涂層晶粒均能發(fā)生一定程度的細(xì)化。所獲三元陽極涂層主要組成物相為金紅石（Ru，Sn，Ti）O2固溶體，SnO2組元含量較高的涂層出現(xiàn)不同成分金紅石相共存的現(xiàn)象；當(dāng)涂層退火溫度由450℃升高至600℃后，SnO2組元不能阻止（Ru，Sn，Ti）O2固溶體脫溶分解，并析出六方晶系Ru單質(zhì)；添加SnO2組元的RuO2+SnO2+TiO2涂層晶粒外觀呈較理想等軸狀特征。
關(guān)鍵字: 鈦陽極；溶膠凝膠法；納米涂層；SnO2
morphology of RuO2+SnO2+TiO2/Ti
anode
（1. Department of Materials Science and Engineering,
Xi′an Jiaotong University， Xi′an 710049， China;
2. Institute for Materials Research，
Fuzhou University ， Fuzhou 350002， China）
Abstract:RuO2+SnO+TiO2 titanium anode coatings with different amounts of SnO2 were obtained by a sol-gel procedure through brushing，sintering and annealing. The microstructure, morphology and particle size of the coatings were examined by means of XRD， DTA and TEM. The results show that the crystal size of the coatings is nanometered， which is sharply reduced when the content of SnO2 increases at the different annealing temperatures. The coatings mainly consist of a solid solution-(Ru，Sn，Ti)O2 with several different kinds of rutile phases which coexist when the content of SnO2 increases. When the annealing temperature changes from 450℃ to 600℃，the (Ru，Sn，Ti)O2 solid solution is decomposed and hexagonal Ru is found among the studied coatings. The morphology of the crystals affected greatly by SnO2 is equiaxial.
Key words: titanium anode; sol-gel; nanometered coating; SnO2
