Abstract
Tuning the dielectric properties via composition-tailoring is demonstrated for variable-lithium, constant-titanium co-doped nickel oxide (LixTi0.1Ni1⿿xO; x=0.05⿿0.30; referred to LTNO). The effect of variable Li-content on the structure and dielectric properties of LTNO is investigated. X-ray diffraction studies confirm the formation of a cubic NiO phase in LTNO for x=0.05⿿0.30. However, lattice parameter reduction was evident with increasing Li-content. Composition-driven giant dielectric constant (104⿿105) was observed for a higher lithium content (x=0.15⿿0.30) leading to realization of LTNO ceramics. The origin of the high dielectric constant observed in these low density LTNO ceramics is attributed to the Maxwell⿿Wagner polarization mechanism.
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