| With the rapid development of communication and information technology, integrated system of dense, lightweight and versatile degree to further improve, so the materials, design and integration technology have put forward higher requirements. Faced with these outstanding issues, the advantages of the composite material on the functional integration is more and more obvious. Anti-ferroelectric-ferromagnetic composites because both capacitance and inductance of these two characteristics, not only to provide more choices for the integrated electronic device capacitance, inductance portion, but also broaden the new structure, the function of the device design ideas. Anti-ferroelectric materials, ferromagnetic materials, iron elastic material and also has more iron of multiferroic materials are all iron materials. This is a very important category, and the number of fairly large advanced functional materials. In this paper, the anti-ferroelectric, ferromagnetic material for the study, using a variety of methods to characterize the material properties were introduced. The main contents and results are summarized in the following aspects:First, through high-temperature solid phase reaction Preparation (Pb0.9Ba0.1-xSrx) ZrO3 (x= 0,0.01,0.02,0.03,0.04) ceramics, all sintered samples XRD diffraction pattern indicated the formation of a single phase-pure. Temperature-dependent dielectric studies have shown that with the doping Sr2+/Ba2+ concentration decreases, the anti-ferroelectric phase stability of the material is enhanced, and the ferroelectric phase temperature range shrinks. By a dielectric and impedance measurements to study the high-temperature relaxation behavior of the imaginary part of the characteristic impedance of the frequency of the maximum correlation is found to obey the Arrhenius law, activation energy value between 0.98-1.36 eV, conductivity activation energy values 1.04～1.22 eV between, indicating that the process is a thermal conductance movement. This is a value of activation energy of thermal motion of the material indicate that the dynamic relaxation mechanism is conducted by a dipole controlled, ionized oxygen vacancies could explain this behavior. Electric hysteresis loop of the sample through the study of the energy storage characteristics of the ferroelectric materia.Second, Preparation of (1-x) Pb0.9Ba0.1ZrO3-xCo0.5Ni0.5Fe2O4 (x=0.25,0.50,0.75) anti-ferroelectric-ferromagnetic composite ceramics, and the electrical and magnetic properties were characterized. XRD diffraction pattern showed that all the ingredients are no impurity phase appears. The research shows that dielectric properties of the ceramic composite has been significantly improved, through the impedance spectroscopy analysis, studied ceramics there are two charge transport mechanisms. The measurement of electric hysteresis loop and magnetic hysteresis loop show that the composite ceramics having good ferroelectric and magnetic, which can be applied to the ferroelectric and ferromagnetic storage. x= 0.25 components exhibit the highest ferroelectric storage characteristics, the residual polarization and coercive field were 60.47 μC/cm2、11.95 kV/cm, respectively. While x= 0.75 showed the highest component of the ferromagnetic storage properties, saturation magnetization and residual magnetization was 45.24 emu/g、3.07 emu/g, respectively. for the energy density and efficiency of 21.30 J/g and 90%.Third, Nano-magnetic powder prepared by the Co0.5Ni0.5Fe2O4 co-precipitation method, Structure and magnetic properties of the sample have been measured, XRD results indicate that the sample having a spinel structure (311) crystal orientation. The influence of different annealing temperature on the powder grain size analysis of magnetic data material, the energy density、 density loss and storage efficiency were 0.0168 J/g、0.0177 J/g and 49%, respectively. |
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