100nmBaTiO3 powder was used as raw material, which was hydrothermally activated in 0.1mol/L acetic acid solution at 100℃ for 1 hour. Then, with Ba (OH) 2.8H2O as flux, the powder was cold sintered at 350MPa and 400℃ for 1 hour and then annealed at 600℃ for 0.5h hour. The ceramic samples with relative density of 96.62%, grain size of 180nm, electric constant (εr) of 2836 and dielectric loss (tanθ) of 0.03 were obtained.
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