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A Short Review on Copper Calcium Titanate(CCTO) Electroceramic;Synthesis,Dielectric Properties,Film Deposition,and Sensing Application

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Nano-Micro Letters 2016年第4期8卷 291-311页

作者： mohsen ahmadipour Mohd Fadzil Ain Zainal Arifin Ahmad Structural Materials Niche Area School of Materials and Mineral Resources EngineeringUniversiti Sains MalaysiaEngineering Campus School of Electrical and Electronic Engineering Universiti Sains Malaysia Engineering Campus

Electroceramic calcium copper titanates(CaCu3Ti4O12,CCTO),with high dielectric permittivities（e） of approximately 105 and 104,respectively,for single crystal and bulk materials,are produced for a number of wellestablished and emerging applications such as resonator,capacitor,and *** applications take advantage of the unique properties achieved through the structure and properties of *** review comprehensively focuses on the primary processing routes,effect of impurity,dielectric permittivity,and deposition technique used for the processing of electroceramics along with their chemical composition and micro and *** is given to versatile and basic approaches that allow one to control the microstructural features that ultimately determine the properties of the CCTO *** the intensive research in this area,none of the studies available in the literature provides all the possible relevant information about CCTO fabrication,structure,the factors influencing its dielectric properties,CCTO immobilization,and sensing applications.

关键词： CCTO Chemical synthesis Dielectric permittivity Loss factor Deposition Sensitivity

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Preparation and Characterization of Nano-Sized (Mg(x)Fe(1–x)O/SiO2) (x = 0.1) Core-Shell Nanoparticles by Chemical Precipitation Method

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Advances in Nanoparticles 2012年第3期1卷 37-43页

作者： mohsen ahmadipour Mozhgan Hatami Kalagadda Venkateswara Rao Center Nano science and Technology Institute of Science and Technology Jawaharlal Nehru Technological University Hyderabad Hyderabad India

Magnetic core-shell nanoparticles have been widely studied because of their excellent and convenient magnetic and electrical *** this present work core-shell magneticnanoparticles (MNPs) were synthesized by simple chemical precipitation method. Firstly Mg(x)Fe(1–x)O (magnesiwuestite) nano powder samples were synthesised by low temperature chemical combustion method. Secondly the as synthesised Mg(x)Fe(1–x)O nanoparticles are used to synthesis magnetic core-shell Nano particles byusing 2-propanol, poly ethylene glycol (PEG), ammonia solution 30 wt%, tetraethyl orthosilicate (TEOS). Separation of the core-shell magnetic nanoparticles from the aqueous suspension using a centrifuge. The synthesised MNPs and core shell MNP were characterized by X-ray diffraction (XRD), Thermal gravimetric-differential thermal analyzer (TG-DTA), Transmission electron microscopy (TEM), scanning electron microscopy (SEM), (EDAX) for structural, thermal and morphological respectively. It is observed that the particle size of spherical sampleis 32.5 nm.

关键词： Magnetic Nanoparticle Core-Shell TG-DTA SEM TEM

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