Nanocomposite ceramics based on La-doped BaTi{sub}2O{sub}5 and BaTiO{sub}3 with high temperature-independent permittivity and low dielectric loss

摘要

Nanocomposite ceramics containing a mixture of two ferroelectric phases, La-doped BaTi{sub}2O{sub}5 and BaTiO{sub}3, with carefully-controlled phase amounts and ceramic microstructure have temperature-independent permittivity and low dielectric loss over very wide temperature ranges: ε'=95±10 from 25 to 600℃; tan 5=0.02(2) from 25 to 400℃, measured at 100 kHz. Further optimisation of properties should be possible.