Giant dielectric behavior and electrical properties of Ca1−3x/2Lu x Cu3Ti4O12 ceramics
Source abstract
Abstract
Giant dielectric behavior and electrical properties of Ca1−3x/2Lu x Cu3Ti4O12 ceramics were studied by focusing on the influences of Lu3+ doping on their microstructure and electrical properties. The mean grain size of CaCu3Ti4O12 was greatly reduced as the dopant content was increased to 15 at.% (x = 0.15), which was ascribed to the effect of solute drag. X-ray absorption near-edge structure confirmed the presence of Ti3+ ions in Ca1−3x/2Lu x Cu3Ti4O12 ceramics. The ratio of Ti3+/Ti4+ in CaCu3Ti4O12 was reduced by Lu3+ doping. Dielectric permittivity (e′) decreased with increasing Lu3+ content, which was ascribed to reduce grain boundary capacitance caused by the presence of Lu3+. Activation energies for conduction in the grain interiors and at the grain boundaries were slightly changed with Lu3+ content. Interestingly, improved dielectric properties with e′ ~3.56 × 104 and tanδ ~0.059 at 1 kHz in the Ca0.925Lu0.05Cu3Ti4O12 ceramic were achieved.
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Research context
OpenAlex topics: Dielectric properties of ceramics · Ferroelectric and Piezoelectric Materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
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