Capacitors

utilize high dielectric constant ferroelectric formulations (K>500) based upon barium titanate. They exhibit markedly non-linear temperature characteristics, significant dependence on voltage and frequency, and predictable logarithmic decay of capacitance with time. Dielectric constants are available in the range of 500 to 3000, and are characterized by changes in capacitance by +_15% or less with changes in temperature over the rated temperature range. These capacitors are suited for by-pass, coupling, and filtering applications where Q and stability of capacitance characteristics are not of major importance. They exhibit predictable changes with time, voltage, and frequency.