TY - JOUR
T1 - Anodic oxidization of Ti–Ni–Si amorphous alloy ribbons and their capacitive and resistive properties
AU - Fukuhara, M.
AU - Sugawara, K.
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Science Research in a Priority Area, “Adaptable and Seamless Technology Transfer Program through target-driven R&D”, from the Japan Science and Technology (JST) Agency under the Ministry of Education, Culture, Sports Science, and Technology, Japan .
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Amorphous titanium oxide film on Ti–Ni–Si amorphous alloy ribbons was prepared by anodic polarization process in ten kinds of electrolyte solutions. Addition of NH4F in (NH4)2SO4 solution accelerates an increase in current, i.e. formation of soluble Ti-fluoride complexes, resulting in the amorphous titanium oxide layers with nanometer-sized pores. Pore size decreases down to 12 nm with decreasing of applied voltage from 30 to 5 V. However, parallel capacitance Cp, series capacitance Cs, and RCs constant increase with decrease of pore size from 23 to 18 nm and then decrease in pore size region from 18 to 12 nm by formation of penetrating tunnels in the layer. It needs further enhancement of RCs for realization of superior electric storage capacitor.
AB - Amorphous titanium oxide film on Ti–Ni–Si amorphous alloy ribbons was prepared by anodic polarization process in ten kinds of electrolyte solutions. Addition of NH4F in (NH4)2SO4 solution accelerates an increase in current, i.e. formation of soluble Ti-fluoride complexes, resulting in the amorphous titanium oxide layers with nanometer-sized pores. Pore size decreases down to 12 nm with decreasing of applied voltage from 30 to 5 V. However, parallel capacitance Cp, series capacitance Cs, and RCs constant increase with decrease of pore size from 23 to 18 nm and then decrease in pore size region from 18 to 12 nm by formation of penetrating tunnels in the layer. It needs further enhancement of RCs for realization of superior electric storage capacitor.
KW - Amorphous alloys
KW - Amorphous titanium oxide film
KW - Electric storage devices
KW - Fluoride ions
KW - Nanometer-sized pores
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U2 - 10.1016/j.tsf.2015.10.041
DO - 10.1016/j.tsf.2015.10.041
M3 - Article
AN - SCOPUS:84983252178
SN - 0040-6090
VL - 595
SP - 1
EP - 4
JO - Thin Solid Films
JF - Thin Solid Films
ER -