Abstract
The complex perovskite ACu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (A = Ca, Bi<sub>2/3</sub>, Y<sub>2/3</sub>) which possess high dielectric constant could be promising candidates to replace relaxors as dielectrics in DRAM, MLCCs and other memory devices. Their smaller capacitive components lead to miniaturization of electronic devices with efficient performance. Yttrium Copper Titanate (Y<sub>2/3</sub>Cu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>) nano-ceramic is structurally analogous to CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>. XRD of Y<sub>2/3</sub>Cu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> shows the presence of all normal peaks of CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>. SEM micrograph exhibits the presence of bimodal grains of size ranging from 1-2 μm. Bright field TEM image clearly displays nano-crystalline particle which is supported by presence of a few clear rings in the corresponding selected area electron diffraction pattern. It exhibits high dielectric constant (ε′= 8434) at room temperature and 100 Hz frequency with characteristic relaxation peaks.
Published Version
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