Dielectric properties of low temperature nano engineered yttrium copper titanate ceramic

Sunita Sharma; M. M. Singh; K. D. Mandal; Narsingh B. Singh

doi:10.1117/12.2177954

18 May 2015 Dielectric properties of low temperature nano engineered yttrium copper titanate ceramic

Sunita Sharma, M. M. Singh, K. D. Mandal, Narsingh B. Singh

Proceedings Volume 9493, Energy Harvesting and Storage: Materials, Devices, and Applications VI; 949307 (2015) https://doi.org/10.1117/12.2177954
Event: SPIE Sensing Technology + Applications, 2015, Baltimore, MD, United States

Abstract

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.

Citation Download Citation

Sunita Sharma, M. M. Singh, K. D. Mandal, and Narsingh B. Singh "Dielectric properties of low temperature nano engineered yttrium copper titanate ceramic", Proc. SPIE 9493, Energy Harvesting and Storage: Materials, Devices, and Applications VI, 949307 (18 May 2015); https://doi.org/10.1117/12.2177954

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