Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43439
標題: Synthesis of barium titanate films by plasma electrolytic oxidation at room electrolyte temperature
作者: Wu, C.T.
呂福興
Lu, F.H.
關鍵字: barium titanate;plasma electrolytic oxidation;spark discharge;roughness;dielectric constant;hydrothermal-electrochemical method;batio3 thin-film;growth
Project: Surface & Coatings Technology
期刊/報告no:: Surface & Coatings Technology, Volume 199, Issue 2-3, Page(s) 225-230.
摘要: 
Crystalline barium titanate films were directly synthesized onto Ti plates by plasma electrolytic oxidation at room temperature using barium acetate and 2 M NaOH as electrolytes. The effect of the concentration of barium acetate ranging from 0.05 M to 0.5 M on the synthesis of BaTiO3 was investigated. XRD results showed that the formation of BaTiO3 required a minimum of 0.1 M barium acetate. The electrolytic voltage was controlled at voltages below 85 V to avoid film deterioration by the intense arcing. The current time curves indicated that intermittent spark discharges were initiated at about 60 V and continued to above 80 V SEM results revealed the crater-shaped and grained cubic phase barium titanate films formed by plasma electrolytic oxidation. Surface roughness could be greatly reduced by about one order of magnitude by decreasing electrolytic temperature from 55 degrees C to room temperature. The thickness of the films could reach 20 mu m and the dielectric constant could reach 1240 at frequency of 100 Hz. (c) 2005 Elsevier B.V All rights reserved.
URI: http://hdl.handle.net/11455/43439
ISSN: 0257-8972
DOI: 10.1016/j.surfcoat.2004.10.148
Appears in Collections:材料科學與工程學系

Show full item record
 

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.