The Impact of the Sintering Temperature of Ferrite LTCC Materials on the Characteristics of dc Tunable Inductor

摘要

This paper is devoted to the study of the usage of the low-temperature co-fired ceramic (LTCC) ferrite cores in dc current tunable inductors. Tested ferrite LTCC toroidal cores are fabricated from commercial ESL 40011 tapes and sintered at 885, 1000, 1100 and 1200°C. Tested inductors obtained a large tunable inductance range ΔL/Lminup to 647 %. Quality factor improvement under applied dc current is noticeable and it is enhanced by ~6 times.