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Proceedings Paper

Dielectric properties of low temperature nano engineered yttrium copper titanate ceramic
Author(s): Sunita Sharma; M. M. Singh; K. D. Mandal; Narsingh B. Singh
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Paper Abstract

The complex perovskite ACu3Ti4O12 (A = Ca, Bi2/3, Y2/3) 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 (Y2/3Cu3Ti4O12) nano-ceramic is structurally analogous to CaCu3Ti4O12. XRD of Y2/3Cu3Ti4O12 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.

Paper Details

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
Show Author Affiliations
Sunita Sharma, Banaras Hindu Univ. (India)
M. M. Singh, Banaras Hindu Univ. (India)
K. D. Mandal, Banaras Hindu Univ. (India)
Narsingh B. Singh, Univ. of Maryland (United States)


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

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