Magnetic and dielectric properties of Li0.63Zn0.37Fe2O4−xCaTiO3 composites for LTCC application

Li
_0.63
Zn
_0.37
Fe
₂
O
_4-x
CaTiO
₃
(x=0wt%, 4wt%, 8wt%, 12wt%, 16wt%) composites were prepared by the solid state reaction method and sintered at 920 °C with slight Bi
₂
O
₃
additive. The phase formations, structure, magnetic and dielectric properties of composites were investigated. The results revealed that the composites contained two phase formations, with no other phases. Scanning electron microscope and bulk density showed that densification of composites was enhanced by adding CaTiO
₃
material. Vibrating sample magnetometer indicated the saturation magnetization decreased from 46.2 emu/g to 30.8 emu/g, while the coercivity increased from 38.7 Oe to 46.8 Oe. Meanwhile, LiZn-CTO composites possessed high dielectric permittivity (ε'
_max
=31.2) and magnetic permeability (μ'
_max
=20.6), which can be used in LTCC integrated devices such as electromagnetic interference filters and antennas.