TY - JOUR
T1 - AC charging/discharging of de-alloyed Si-Al-V alloy ribbons
AU - Fukuhara, M.
AU - Yoshida, H.
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Science Research in Priority Areas, ‘Advanced Materials Development and Integration of Novel Structured Metallic Glasses and Inorganic Materials’ and ‘Advanced Low Carbon Technology Research and Development Program’ from the Japan Science and Technology Agency under the Ministry of Education, Culture, Sports Science and Technology, Japan .
PY - 2014
Y1 - 2014
N2 - In anticipation of prompt ac charging/discharging characteristics, the capacitance of de-alloyed Si1-x(Al0.5,V 0.5)x (x = 0.15, 0.2, 0.3, and 0.4) alloy ribbons with resistivities of 0.01-4300 Ωcm was measured as a function of frequency between 1 mHz and 1 MHz, using exponential transient analysis for electric charging/discharging. The capacitance of de-alloyed Si-7.5 at.%.Al-7.5 at.%. V obtained by prompt (100 ms-25 ns) charging/discharging decreased logarithmically from 105 μF to 18 pF as frequency increased from 1 mHz to 10 kHz, and then saturated between 10 kHz and 1 MHz. From the observed electrode distance dependence on capacitance, we deduced that the alloy consisted of a distributed constant equivalent circuit (series with 1.2% parallel), analogous to electric double layer capacitors.
AB - In anticipation of prompt ac charging/discharging characteristics, the capacitance of de-alloyed Si1-x(Al0.5,V 0.5)x (x = 0.15, 0.2, 0.3, and 0.4) alloy ribbons with resistivities of 0.01-4300 Ωcm was measured as a function of frequency between 1 mHz and 1 MHz, using exponential transient analysis for electric charging/discharging. The capacitance of de-alloyed Si-7.5 at.%.Al-7.5 at.%. V obtained by prompt (100 ms-25 ns) charging/discharging decreased logarithmically from 105 μF to 18 pF as frequency increased from 1 mHz to 10 kHz, and then saturated between 10 kHz and 1 MHz. From the observed electrode distance dependence on capacitance, we deduced that the alloy consisted of a distributed constant equivalent circuit (series with 1.2% parallel), analogous to electric double layer capacitors.
KW - Capacitance spectroscopy
KW - Dielectric response
KW - Metals and alloys
KW - Quenching
KW - Rapid-solidification
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U2 - 10.1016/j.jallcom.2013.03.201
DO - 10.1016/j.jallcom.2013.03.201
M3 - Article
AN - SCOPUS:84888874510
VL - 586
SP - S130-S133
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - SUPPL. 1
ER -