Improved Corrosion Resisting Property of Magnetism Iron Fiber by SiO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Coating

Dongying Niu,Jinku Yu,Dongdong Wang,Runhai Liu,Qi Qiao

doi:10.4236/jsemat.2012.23026

Abstract

To improve the oxidation resistance property of iron fibers, a SiO2 coated iron fiber was prepared by sol-gel method, and its microstructure, element and phase composition, antioxidation property, and crystallization were characterized by scanning electron microscopy, thermal gravimetric analysis, X-ray diffraction and 3% CuSO4 solution dripping. It was found that the surface of the iron fiber can be fully covered with SiO2 by using Sol-Gel method. Our results also indicated that the time of iron begin to be corrupted in 3% CuSO4 solution drip increased from 30 s to 240 s, and the temperature increased from 200?C to 310?C. In addition, the oxidation and antioxidation mechanisms of the SiO2 coated iron fiber have also been discussed in this work.

Highlights

IntroductionThe most commonly used microwave absorbers are magnetic materials (such as ferrite particles) and dielectric materials (such as carbon black particles) [1,2,3]
Up to now, the most commonly used microwave absorbers are magnetic materials and dielectric materials [1,2,3]
To improve the oxidation resistance property of iron fibers, a SiO2 coated iron fiber was prepared by sol-gel method, and its microstructure, element and phase composition, antioxidation property, and crystallization were characterized by scanning electron microscopy, thermal gravimetric analysis, X-ray diffraction and 3% CuSO4 solution dripping

Summary

Introduction

The most commonly used microwave absorbers are magnetic materials (such as ferrite particles) and dielectric materials (such as carbon black particles) [1,2,3]. The MIFs oxidized in air, and this poor anti-corrosion ability prevents its wide applications. A new technique is necessary to develop to improve the anti-corrosion ability of MIFs. The sol-gel technique is a low-temperature route widely employed to prepare thin films for use in the different fields, because it can offer the homogeneous thin. Films at molecular scale and control of chemical purity It has a rapid development in the field of machining electromagnetic materials and the interest to prepare the materials by sol-gel methods [18,19] has increased remarkably. SiO2 has excellent insulation property and antioxidation property To this end, a novel SiO2 coated MIFs has been developed by sol-gel technique in this paper. Our experimental results further demonstrated that the antioxidation property of the SiO2 coated MIFs has been improved

Experimental Methods

Results and Discussion

Conclusion