Phosphorus solid solution effects of electric and dielectric properties on sintered WO3 ceramics

Phosphorus solid-soluted WO3 ceramics (PxW1−xO3) were fabricated by a solid state reaction at 1000°C for 100 h with the phosphorus concentration x of 0 to 0.3. Phosphorus-doped single-phase monoclinic WO3 ceramics were fabricated with phosphorus concentration between 0 and 0.3. Sintered WO3 pellets that were P-doped with phosphorus concentrations of 0–0.3 were synthesized at 1000°C in 24 h in order to evaluate electric and dielectric properties. The resistivity of specimens decreased concomitantly with increasing the stoichiometry x in PxW1−xO3 from 0 to 0.15, and that increased with increasing phosphorus concentration larger than 0.15. The dielectric constants of the specimens decreased with increase of phosphorus concentration, and the dielectric constant of the P0.05W0.95O3 and P0.10W0.90O3 were 2100 and 1400 at 100 kHz at room temperature, respectively.