Microstructure and Properties of Ni_(0.5)Zn_(0.5)Fe_2O_4-BaTiO_3 Ceramic

摘要

Ni_(0.5)Zn_(0.5)Fe_2O_4-BaTiO_3 composites were prepared by calcining Ni_(0.5)Zn_(0.5)Fe_2O_4 with BaTiO_3 at 1220℃ for 3 h. Both μ' and μ'' of the composites decrease rapidly, but the cut-off frequency shifts to higher level with increasing BaTiO_3 content. The dielectric constant of the composites increases quickly with increasing BaTiO_3 content below 50% and keeps a high and nearly unchangeable value with increasing BaTiO_3 above 50%. The composites with BaTiO_3 content between 20% and 40% are suitable to use for the magneto-electric devices under high applied frequency due to its high permeability and low dielectric loss.