Articles written in Bulletin of Materials Science

    • Synthesis, characterization and dielectric properties of TiO$_2$–CeO$_2$ ceramic nanocomposites at low titania concentration


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      TiO$_{2(x)}$–CeO$_{2(1−x)}$ nanocomposites were prepared at low TiO$_2$ composition of 5, 10, 15 and 20%, by using TiO$_2$ and CeO$_2$ nanoparticles obtained by polymeric citrate precursor method. These nanocomposites were characterized by using powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive analysis of X-rays and BET surface area studies. BET studies showed the specific surface area of as-prepared nanocomposites in the range of 239–288 m$^2$ g$^{−1}$. Twenty percent of TiO$_2$-based titania–ceria nanocomposites have smallest average particle size of 30 nm and highest surface area of 288 m$_2$ g$^{−1}$ among all the as-prepared nanocomposites. The dielectric characteristics were measured as a function of frequency and temperature. The dielectric constant of TiO$_{2(x)}$–CeO$_{2(1−x)}$ at room temperature was 35.6 (maximum) at 500 kHz for $x = 0.20$.

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