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Ay Ching Hee,Mehdi Mehrali,Hendrik Simon Cornelis Metselaar,Mohammad Mehrali,Noor Azuan Abu Osman 대한금속·재료학회 2012 ELECTRONIC MATERIALS LETTERS Vol.8 No.6
Ferrite is an important ceramic material with magnetic properties that are useful in many types of electronic devices. In this study, structure and magnetic properties of nanostructured nickel zinc ferrite and magnesium copper zinc ferrite prepared by water-in-oil microemulsion were compared. Both ferrites samples demonstrated similar weight loss characteristics in TGA. The magnesium copper zinc ferrite showed a crystalline structure with an average crystallite size of 13.5 nm. However, nickel zinc ferrite showed an amorphous phase. Transmission electron micrographs showed agglomerated nanoparticles with an average crystallite size of 26.6 nm for magnesium copper zinc ferrite and 22.7 nm for nickel zinc ferrite. Magnesium copper zinc ferrite exhibited soft ferromagnetic bahaviour whereas nickel zinc ferrite showed superparamagnetic nature.
Sina S. Jamali,Yue Zhao,Zhiming Gao,Huijun Li,Ay Ching Hee 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.43 No.-
Field application of electrochemical measurements with a non-invasive electrode arrangement has beenused for investigating corrosion damage and protectiveness of a paint coating on an artwork sculpture. For thisfield application solid state probes were designed and used in electrochemical impedancespectroscopy (EIS) and electrochemical noise measurement (ENM) to evaluate the level of corrosionprotection afforded by the paint coating. Samples were also analyzed in laboratory using analyticaltechniques. Results of electrochemical measurements indicated poor protective properties of the paintcoating while analytical examinations revealed an inhomogeneous structure of the coating and a highlyporous structure of the oxide scale.