Modified amorphous layered titanates as precursor materials to produce heterostructured nanopowders and ceramic nanocomposites

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• 作者：A.V. Gorokhovsky ; E.V. Tretyachenko ; J.I. Escalante-Garcia ; G.Yu. Yurkov ; V.G. Goffman
• 关键词：Layered titanates ; Heterostructured nanoparticles ; Amorphous precursor materials ; Thermal behavior ; Nonlinear electric properties
• 刊名：Journal of Alloys and Compounds
• 出版年：15 February, 2014
• 年：2014
• 卷：586
• 期：supp_S1
• 页码：S494-S497
• 全文大小：680 K

文摘

This report is concentrated upon manufacturing some new kinds of electroceramics based on synthesis of layered potassium polytitanate nanoparticles, following chemical treatment of these particles in aqueous solutions containing transition metal ions (Meⁿ⁺), and thermal treatment of the obtained amorphous precursor materials at the temperatures which allow producing the final ceramic material characterized with desired functional properties. It was shown that the final ceramics consisted of MeTiO₃, hollandite-like K(Ti,Me)₈O_16.5 crystals and some admixtures of Me or Me_xO_y and K₂Ti₆O₁₃, depending on chemical composition of powdered precursor. It was recognized that the ceramic materials obtained in the system investigated were characterized with nonlinear electric properties which could be regulated by the type of precursor material and its chemical composition.