The complex perovskite ACu₃Ti₄O₁₂ (A = Ca, Bi_2/3, Y_2/3) 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_2/3Cu₃Ti₄O₁₂) nano-ceramic is structurally analogous to CaCu₃Ti₄O₁₂. XRD of Y_2/3Cu₃Ti₄O₁₂ shows the presence of all normal peaks of CaCu₃Ti₄O₁₂. 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.

Date Published: 18 May 2015
PDF: 14 pages
Proc. SPIE 9493, Energy Harvesting and Storage: Materials, Devices, and Applications VI, 949307 (18 May 2015); doi: 10.1117/12.2177954

Published in SPIE Proceedings Vol. 9493:
Energy Harvesting and Storage: Materials, Devices, and Applications VI
Nibir K. Dhar; Achyut K. Dutta, Editor(s)