CD shopping page |
2011-Sustainable Industrial Processing Summit
|
| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-6-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Electrical Conductivity, Anodic Polarization Curve And Ac Impedance Of TiO2 Substituted NiFe2-2xTixO4-x(x≤0.12) In Molten Salt CaCl2-NaCl-0.5%wtCaO
Shulan Wang1;1NORTHEASTERN UNIVERSITY, Shenyang, China;
Type of Paper: Regular
Id Paper: 115
Topic: 9
Abstract:
TiO2 substituted nickel ferrite (NiFe2-2xTixO4-x (x≤0.12)) was synthesized by solid reaction method. Scanned electron microscope and X-ray diffraction techniques were used to characterize the surface morphology and structure of NiFe2-2xTixO4-x (x≤0.12). The electrical conductivity at temperature range of 873-1223K and the anodic polarization curve in equimolar molten salt CaCl2-NaCl-0.5%wtCaO at 873K of NiFe2-2xTixO4-x (x≤0.12) were studied respectively by ac impedance and chronoamperometry techniques. Both the electrical conductivity and polarization current vary nonlinearly with TiO2 substituted amount. And NiFe1.86Ti0.07O3.93 shows the maximum polarization current and therefore has the best polarization property. The ac impedance spectra of NiFe1.86Ti0.07O3.93 in molten salt CaCl2-NaCl-0.5%wtCaO at 873-1073K were investigated. The ac impedance spectra were composed of three semicircles and were simulated by the equivalent circuit of R(Q1/R1)(Q2/R2)(C/R3). The study on the ac impedance spectra shows that molten salt CaCl2-NaCl-0.5%wtCaO wets NiFe1.86Ti0.07O3.93 well and the charge transfer process between NiFe1.86Ti0.07O3.93 and the molten salt is easy.