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Single phase Li 2 W 2 O 7  with anorthic structure was prepared by the conventional solid-state reaction method at 550[Formula: see text]C and the anorthic structure was stable up to 660[Formula: see text]C. The dielectric properties at radio frequency (RF) and microwave frequency range were characterized. The sample sintered at 640[Formula: see text]C exhibited the optimum microwave dielectric properties with a relative permittivity of 12.2, a quality factor value of 17,700[Formula: see text]GHz (at 9.8[Formula: see text]GHz), and a temperature coefficient of the resonant frequency of [Formula: see text]232[Formula: see text]ppm/[Formula: see text]C as well as a high relative density [Formula: see text]94.1%. Chemical compatibility measurement indicated Li 2 W 2 O 7  did not react with aluminum electrodes when sintered at 640[Formula: see text]C for 4[Formula: see text]h.

journal of advanced dielectrics

Preparation, crystal structure, and dielectric characterization of Li2W2O7 ceramic at RF and microwave frequency range