|About this Abstract
||Materials Science & Technology 2012
||Advances in Dielectric Materials and Electronic Devices
||Titanate Oxide Films Grown on Titanium Alloys by Anodizing
||Donald L. McGervey, Dongmyoung Lee, Gerhard E. Welsch
|On-Site Speaker (Planned)
||Donald L. McGervey
Mixed metal oxide is grown on a titanium alloy by an electrochemical process. The titanium alloy forms the anode and another titanium electrode forms the cathode of an electrochemical cell. An oxygen-ion-conducting fluid serves as the electrolyte. A DC current is applied to force the anodic growth of an oxide film, the dielectric. The growing film sustains an increasing voltage, proportional to its thickness and electric field strength. The cell voltage ramps up and is then held constant at a limit voltage. The oxide growth ceases, and the current decreases until only a small leakage current is left. Oxide films grown in this manner are useful dielectrics in electrolytic capacitors. We present the results of several titanium alloy compositions that were anodized to voltages ranging from 10V to 300V. Oxide structures, capacitances and leakage currents were evaluated and will be compared with those of commercial electrolytic capacitors.Research Support from ARPA-E.