286 citations
8 papers
Structural and dielectric properties of glasses in the system TeO2-CaCu3Ti4O12
P. Thomas, K. B. R. Varma
The glasses in the system (100-x)TeO2-xCaCu3Ti4O12, (x=0.25 to 3 mol %) were fabricated. The color varied from olive green to brown as the CaCu3Ti4O12 (CCTO) content increased in T…
Synthesis of Nanoparticles of the Giant Dielectric Material, CaCu3Ti4O12 from a Precursor Route
P. Thomas, K. Dwarakanath, K. B. R. Varma +1
A complex oxalate precursor, CaCu3(TiO)4(C2O4)8.9H2O, was synthesized and the precipitate that obtained was confirmed to be monophasic by the wet chemical analyses, X-ray diffracti…
Fabrication and Characterization of Poly(methyl methacrylate)CaCu3Ti4O12 Composites
P. Thomas, R. S. Ernest Ravindran, K. B. R. Varma
Composites comprising Poly(Methyl Methacrylate) (PMMA) and CaCu3Ti4O12 (CCTO) via melt mixing followed by hot pressing were fabricated. These were characterized using X-ray diffrac…
In-situ synthesis and characterization of polyaniline -CaCu3Ti4O12 nano crystal composites
P. Thomas, K. Dwarakanath, K. B. R. Varma
High dielectric constant nano composite of Polyaniline (PANI) CaCu3Ti4O12 (CCTO) was synthesized using a simple procedure involving in-situ polymerization of aniline in dil. HCl. T…
Nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route
P. Thomas, K. Dwarakanath, K. B. R. Varma +1
A method of preparing the nanoparticles of CaCu3Ti4O12 (CCTO) with the crystallite size varying from 30 to 200 nm is optimized at a temperature as low as 680 1C from the exothermic…
Effect of calcium stoichiometry on the dielectric response of CaCu3Ti4O12 Ceramics
P. Thomas, K. Dwarakanath, K. B. R. Varma
CaxCu3Ti4O12 polycrystalline powders with variation in calcium content were prepared via the oxalate precursor route. The structural, morphological and dielectric properties of the…