經電化學處理之鈦金屬表面奈米多孔性氧化層之研究

Research on a Nanoporous Oxide Film on a Titanium Surface by Electrochemical Treatment

鄭信忠(Hsin-Chung Cheng) ； 詹宗瑾(Chung-Chin Chan) ； 李勝揚(Sheng-Yang Lee) ； 林哲堂(Che-Tong Lin) ； 歐耿良(Keng-Liang Ou)

《中華牙醫學雜誌（中文版）》 25卷2期 (2006/06) Pp. 96-102

https://doi.org/10.7106/CJD.200606.0096

摘要

本研究以電化學陰極處理方式使鈦必金屬表層形成一層氫化鈦(TiH2)薄膜，再以電化學陽極處理，使表面形成一層奈米網狀多孔性的二氣化鈦(TiH2)結構，並以物理化學性的分析儀器測試表面之成分、元素、膜厚、孔洞大小及結構，並探討奈米網狀多孔性的氧二化鈦的形成機制。根據本研究結果顯示，以陰極後陽極氧化處理的方式所產生三維奈米網狀多孔性結構之二氧化鈦，特性優於傳統陽極處理製程所產生的氧化層。於固定電壓下其氣化層厚度較單純陽極處理更厚且表層會形成奈米級孔洞。形成此種三維奈米網狀多孔性結構的主要原因，是因於陰極處理時奈米氫化鈦的生成，而奈米氫化鈦於陽極氣化時氫化鈦產生溶解反應而致使此多孔性氧化膜的生成。

關鍵字

陰極處理 ； 陽極處理 ； 奈米網狀多孔性二氧化鈦

並列摘要

Titanium-based alloys have been investigated by many researchers. Their excellent biocompatibility is due to a passive oxide film. The surface characteristics of titanium, such as pore size and roughness, are related to initial cell behaviors and osseointegration. Osseointegration can apparen6y be improved and maintained if the titanium is oxidized and porous. However, the surface design of dental implants which enhances the rate of osseointegration remains unknown. In this study, an electrochemical process was performed as a surface treatment for titanium. Titanium hydride (TiH2) was formed on the titanium surface after cathodic treatment. A nano-porous titanium oxide structure was formed by anodic surface treatment. The physical and chemical properties of titanium with and without electrochemical treatments were analyzed. Furthermore, the mechanisms by which oxidation and porosity of titanium surfaces are formed are also discussed. In traditional anodic treatments, the pore size increases with the oxidation thickness. In order to obtain thick oxidation and a minimum pore size, titanium hydride plays an important role in forming a thick nano-porous titanium oxide structure. Titanium hydride comprises the nanostructure. When it was dissolved in an alkaline solution, a thick titanium oxide nano-porous layer was formed.

並列關鍵字

cathode ； anodic ； mesh nanoporous titanium oxidation