This paper investigated the moisture absorption, mechanical behavior and the dielectric performance of hybrid and non-hybrid polymeric composites. Hand lay-up technique was used for processing carbon; glass reinforced polyester resin composites (non-hybrid) and carbon-glass/polyester hybrid composites with various fiber configurations. The maximum resistance of water absorption was obtained for...

The electrical conduction phenomena, dielectric response and microstructure have been discussed in sintered silicon nitride ceramics at different temperature and frequencies. Microstructure and phase of the sintered samples was investigated by Scanning Electron Microscope (SEM) and X-ray diffractometer (XRD). The electrical conductivity, dielectric constant and dielectric loss increases exponen...

PbSrWO4 and PbBaWO4 have been synthesised by the solid state reaction technique XRD patterns show them to be tetragonal. Dielectric constant (K/) and Dielectric loss (K//) of PbSrWO4 and PbBaWO4 have been measured at 1 kHz in the temperature range of 300 to 1050 K. The log K/ vs T as well as log K// vs T plot of PbSrWO4 and PbBaWO4 shows rapid increase of dielectric constant above 590 K and 640...

The rectangular dielectric waveguide (RDWG) technique has been developed for the determination of the dielectric constant of materials from effective refractive index measurements in the Q and W bands. This paper describes the use of an optimization method in conjunction with the RDWG technique for the determination of both the dielectric constant and loss tangent of materials at Ka-Band. The e...

Three-phase composite films consisting of BaTiO3/singlewalled carbon nanotube (SWCNT)/polymer were fabricated. The SWCNTs were shortened and coated with SiO2 to minimise the conducting paths of the SWCNTs in the film. The film showed a dielectric constant and dielectric loss of 92 and 0.031, respectively, at a frequency of 1 kHz. The SiO2-coated short SWCNTs can play important roles in enhancin...

Dielectric properties of clove oil were determined using an impedance gain phase analyzer (HP 4194 A) at discrete frequencies between 10 kHz and 3 MHz and a range of temperature between 25 °C and 45 °C. A micro processor controller based temperature controller (Julabo F-25) was used for keeping the temperature of clove oil constant. Dielectric constant of the sample is found to decrease with in...

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