Low-melting H3BO3, acting as sintering aid, was used to reduce the sintering temperature of 5 wt.% CaTiO3-doped (Zn0.65Mg0.35)TiO3 ceramics. The sintering behaviors, microstructures and microwave dielectric properties with different amounts of H3BO3 addition were investigated. The results showed that H3BO3 additive was very effective for lowering the sintering temperature and improving the bulk...

Temperature acceleration of dielectriccharging effects in state-of-the-art RF MEMS capacitive switches was characterized and modeled. From the measured charging and discharging transient currents across the switching dielectric, densities and time constants of traps in the dielectric were extracted under different temperatures. It was found that, while charging and discharging time constants ar...

Trap states close to the interfaces in thin films of porous low-k dielectric materials are expected to affect interfacial barriers with contacts and consequently electrical leakage and reliability in these materials. These interfacial traps were investigated using capacitance and conductance measurements in metal/insulator/silicon capacitor structures composed of carbon-doped oxide low-k dielec...

The dielectric properties of a methanol-water mixture were measured at different temperatures from 20 to 80 °C at two frequencies 915 MHz and 2450 MHz. These frequencies are most commonly used on industrial and domestic scales respectively. In this study, the dielectric properties of a methanol-water mixture were found to be dependent on temperature, solvent concentration, and presence of plant...

The relative complex dielectric permittivity, e*5e82ie9, of ice has been measured in the frequency range 5–39 GHz and in the temperature range 190–265 K. The cavity resonator method at 5 and 10 GHz and the open resonator method at 33 and 39 GHz were used to determine the low dielectric loss of ice. The real part of permittivity e8 was independent of the frequency. The temperature dependence of ...

Direct experimental estimations of the low-energy (1.5∼10 meV) complex dielectric constants spectrum and its temperature variation have been investigated for La 0.7 Ca 0.3 MnO 3 thin films using terahertz time-domain spec-troscopy. At low temperatures, a clear Drude-term emerges. With increasing temperature, the scattering rate increases, while the plasma frequency decreases, derived both from ...

The magnetoelectric properties of the TbMn(1-x)Sc(x)O3 series have been studied at low temperatures by means of heat capacity, magnetic measurements and impedance spectroscopy. TbMnO3 exhibits as expected three transitions upon lowering the temperature corresponding to the magnetic ordering of the two sublattices (Mn and Tb) and the ferroelectric transition. Ferroelectricity disappears with Sc ...

From an investigation of structure it is shown that there exists a large group of dipolar organic solids whose dipoles have two equilibrium positions with opposite dipole direction. To calculate the dielectric properties Onsager’s theory has been extended and developed into a systematic approximation which converges above a critical temperature. To derive the local field acting on a dipole we h...

We use first-principles density functional theory calculations to investigate the dielectric response of BaZrO3 perovskite. A previous study [Arkbarzadeh et al. Phys. Rev. B 72, 205104 (2005)] reported a disagreement between experimental and theoretical low temperature dielectric constant ǫ for the high symmetry BaZrO3 structure. We show that a fully relaxed 40-atom BaZrO3 structure exhibits O6...

Using a combination of dielectric spectroscopy and atomistic computer simulation techniques, the dynamical behaviour of loosely bound cations in the stuffed-silica minerals nepheline, yoshiokaite and ß-eucryptite has been investigated. The investigation has been extended to include the feldspar minerals albite, K-feldspar and anorthite. The low-frequency dielectric properties of all of the mine...