High field capacitance-temperature behavior of BaTiO/sub 3/ ceramic disc capacitors

摘要

Experimental and theoretical studies are reported on the capacitance-temperature (CT) characteristics of an undoped BaTiO/sub 3/ high-voltage (1000 V) nonlinear ceramic disc capacitor with a 3.6:1 capacitance ratio over the DC bias voltage range, which has application to power electronics snubbers. CT responses for both the zero-bias and 1000-V-bias conditions are modeled in terms of the polarization of permanent dipole moments. High field modeling employed a modified Langevin function, incorporating an empirical domain sensitivity parameter together with a smeared Curie temperature.