18 May 2015 Dielectric properties of low temperature nano engineered yttrium copper titanate ceramic
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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.
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Sunita Sharma, Sunita Sharma, M. M. Singh, M. M. Singh, K. D. Mandal, K. D. Mandal, Narsingh B. Singh, 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); doi: 10.1117/12.2177954; https://doi.org/10.1117/12.2177954

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