Abstract
Dense LiCuVO4 ceramics with a relative density of 95% were facilely fabricated using a conventional solid-state method at low temperatures (∼660 °C). Promising microwave dielectric properties were obtained with a moderate relative permittivity (εr) of 16.9 ± 0.3 and a quality factor (Q × f) of 15,200 ± 300 GHz, but poor temperature stability of the resonance frequency (τf ∼ −61.5 ± 3 ppm/°C). To compensate for the negative τf value, rutile TiO2 with a positive τf value was added to form a series of composite ceramics (1-x)LiCuVO4-xTiO2. As regards, a zero-close τf value (∼−1.4 ppm/°C) was achieved at x = 0.6 compositions with an εr of 18.6 ± 0.3 and a Q × f of 18,000 ± 400 GHz. Additionally, the LiCuVO4 ceramic has good chemical compatibility with silver electrodes. All results support the prospective applications of LiCuVO4 in low-temperature cofired ceramics (LTCC) as substrates.
Published Version
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