FERROELECTRIC CERAMIC MATERIAL BASED ON BARIUM STRONTIUM TITANATE Russian patent published in 2021 - IPC C04B35/468 C04B35/47 

FIELD: electronics.

SUBSTANCE: invention relates to lead-free ferroelectric ceramic materials with a nonlinear dependence of the dielectric constant on the strength of the applied electric field and can be used for the manufacture of low-frequency electronic devices for various purposes. The material contains BaTiO₃, SrTiO₃ and borates of lanthanides LnBO₃ with the following ratio of components, wt%: BaTiO₃ - 77.0-75.0; SrTiO₃ - 19.0-20.0; LnBO₃ - 4.0-5.0, where Ln is one of the rare earth elements of the La, Nd, Pr, Sm groups.

EFFECT: increasing the value of the relative permittivity to the level ε/ε₀=9400-12100 and the coefficient of its controllability by a constant electric field T = 30-34% in the low frequency range of 10-30 kHz.

1 cl, 6 tbl, 7 ex