Xia Song

Discharge Properties of Temperature-Induced Phase Transition from Ferroelectric to Antiferroelectric

The phase transition from ferroelectric to antiferroelectric could be induced by elevating temperature. And then the much charge was released. The discharge properties of phase transition from ferroelectric to antiferroelectric were investigated for PbNb(Zr, Sn, Ti)O 3 material. The heating rate and external load dependence of current and discharge density was studied. Finally, an equivalent circuit model was set up for the discharge characteristics.

Characteristics of Left-Handed Materials with Magnetic Resonance and Electric Anti-Resonance Based on Ceramics

Based on ceramics S-shaped left-handed materials with magnetic resonance and electric anti-resonance were prepared by screen printing. The microwave transmittance properties of these samples in a rectangular waveguide were experimentally investigated. It is found that the two frequency bands of negative effective permittivity and negative effective permeability overlap from 8.5 to 9.46 GHz, which is left-handed materials pass-band and the bandwidth is about 1 GHz. Magnetic resonance is due to magnetic coupling between magnetic field component of external fields and the samples, in which the effective permeability could be negative. And electrical anti-resonance originated from electric coupling may contribute to negative effective permittivity. This based on ceramics substrate S-shaped construct possess both remarkable electric and magnetic resonances, which provides a flexible element for constructing planar left-handed materials.