Dielectric and magnetic properties of low-temperature fired NiCuZn–BaTiO3 composites

Abstract: The composition effects on the dielectric and magnetic properties of NiCuZn–BaTiO3 composites fired at low temperature were investigated. The coexistence of perovskite BaTiO3 and spinel ferrite phases in the composites were observed; no significant chemical reactions occurred between BaTiO3 and NiCuZn ceramics during sintering. The nanosized BaTiO3 powders favored a decrease in grain size. The saturation magnetization, remanent magnetization and real permeability continuously decreased with increasing BaTiO3 content. And the real permittivity continuously increased with the BaTiO3 content. The Q-factor (quality factor) exhibited relatively high values with 20–30wt% BaTiO3. All composite materials exhibited a low dielectric loss below 100MHz. Synthetically considerations, the composites with 20–30wt% BaTiO3 could obtain relatively high real permeability and real permittivity values, and the magnetic and dielectric losses were relatively low, so they were the best candidates to produce LC-integrated chip elements. [Copyright &y& Elsevier]