Abstract
Abstract The influence of Co 2 O 3 and Li 2 CO 3 on the dielectric constant-temperature characteristic of the BaTiO 3 –Nb 2 O 5 –La 2 O 3 –Sm 2 O 3 system (BNLS) was studied. The Co element is useful to flatten the dielectric constant-temperature curve at low temperature. Compared with the influence of Co 2 O 3 , Li 2 CO 3 is an effective additive that can improve the dielectric constant of this system at high temperature near the Curie temperature. This is very helpful for this ceramic system to satisfy the requirement of EIA X7R specification on TCC and still keep a relatively high dielectric constant at room temperature. The possible mechanism of the phenomenon was also discussed.
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