Cold-sintered Ni0.2Cu0.2Zn0.6Fe2O4-Li2MoO4 ceramic composites with enhanced magnetodielectric properties

In this paper, (1-x)Li2MoO4(LMO)-xNi0.2Cu0.2Zn0.6Fe2O4 (NCZO) ceramic composites were consolidated using cold sintering method at a temperature of 150 °C, which is far below the sintering temperature of NZFO ceramic-based systems via conventional ceramic preparation method. The phase composition, microstructure, dielectric properties and magnetic properties of the as-cold-sintered LMO-NCZO ceramic composites were studied. The relative density of all composites is larger than 95 % at a cold sintering temperature of 150 °C for 30 min under a uniaxial pressure of 200 MPa. XRD results showed that the composites were only composed of two phases. SEM revealed that the NCZO particles were enwrapped by the LMO phase. The 0.46LMO-0.54NCZO ceramic composite exhibited excellent magnetodielectric properties with an effective permittivity of about 8.3, a dielectric loss of 0.003, a permeability of 7 and a magnetic loss of 0.024 (@10 MHz), which make it potentially applicable in the miniaturization of electronic devices.