( 1. 福州大學(xué) 材料研究所， 福州 350002；
2. 美國密蘇里羅拉大學(xué) 材料研究中心, 羅拉 65409 )
摘 要: 用溶膠凝膠法制備了CeO2+SnO2/Ti二元氧化物被覆鈦涂層。 經(jīng)不同溫度退火處理后， 通過X射線衍射和透射電子顯微(TEM)對(duì)鈦陽極涂層的顯微結(jié)構(gòu)進(jìn)行了表征。 結(jié)果表明： 通過控制制備條件可獲得具有納米結(jié)構(gòu)的鈦陽極涂層； 當(dāng)Sn的摩爾分?jǐn)?shù)為83%時(shí)， 涂層主要為金紅石相的(Sn, Ce)O2固溶體； 當(dāng)Sn的摩爾分?jǐn)?shù)為44%時(shí)， 涂層中金紅石相(Sn, Ce)O2固溶體和螢石結(jié)構(gòu)的(Ce, Sn)O2固溶體共存； 當(dāng)Sn的摩爾分?jǐn)?shù)為17%時(shí)， 涂層由螢石結(jié)構(gòu)的(Ce, Sn)O2固溶體組成； 高于450 ℃退火時(shí)， 含83%Sn的涂層中出現(xiàn)CeO2相， 而在含83%Ce的涂層中沒有出現(xiàn)SnO2相， 表明在相同的溶質(zhì)濃度下， 螢石結(jié)構(gòu)的(Ce, Sn)O2固溶體比錫基金紅石相(Sn, Ce)O2固溶體具有更好的熱穩(wěn)定性； 而涂層中的SnO2具有明顯改善涂層分散性的作用。
關(guān)鍵字: CeO2； 鈦陽極； 納米材料； 骨架
（ 1. Institute for Materials Research, Fuzhou University, Fuzhou 350002, China;
2. Materials Research Center, University of Missouri-Rolla,
Rolla, MO 65409, USA）
Abstract: CeO2+SnO2 binary oxide coated titanium anodes were prepared by the sol-gel method. Annealed at various temperatures, the microstructures of the anodes were investigated by XRD and TEM. The results indicate that nanoscale coatings can be obtained by controlling the preparation condition. When the molar fraction of SnO2 is 83%, the main component of the coating is (Sn, Ce)O2 solid solution with rutile structure. When the molar fraction of SnO2 is 44%, the main components of coating are the (Sn, Ce)O2 solid solution with rutile structure and (Ce, Sn)O2 solid solution with fluorite structure. When the molar fraction of SnO2 is 17%, the main component of the coating is (Ce, Sn)O2 solid solution with fluorite structure. Annealed at higher temperature than 450 ℃, CeO2 is found in the coating containing 83%Sn, and there is not SnO2 in the coating containing 83%Ce, which suggests that fluorite (Ce, Sn)O2 has higher thermal stability than rutile (Sn, Ce)O2. When the molar fraction of SnO2 increases, the dispensability of the coatings is improved greatly.
Key words: CeO2; titanium anode; nanomaterial; carrier
