Dielectric

conductivity and dielectric spectroscopic for PVA-Ag nanocomposite films The influence of gamma irradiation on the electrical and dielectric properties of AgNO3/ PVA films was investigated. The films were prepared by casting techniques, then irradiated with different gamma doses (25, 50, 75, 100, 125 KGy). The content of the Ag in the PVA film were determined by using atomic absorption spectroscopy (AA), and were found to be 0.4 wt %. The films have been characterized through dielectric spectroscopy

The dielectric relaxation properties and dipole ordering of binary mixtures of low molecular weight Poly Vinyl Alcohol (PVA) with water (WAT) and ternary mixtures of PVA+WAT with Dimethylsulfoxide (DMSO) of different concentration have been measured at 25oC using Time Domain Reflectometry (TDR) technique. The measured values of permittivity ('), dielectric loss (") at 10GHz, static dielectric constant (0) and high frequency limiting dielectric constant () have been used to determine the values

Enhancement of the conductivity and dielectric properties of PVA/Ag nanocomposite films using γ irradiation. Kamal M. Abd El-Kader , Wahib M. Attia , Ahmed .G. El-Shamy * Physics Department, Faculty of Science, Suez Canal University, Ismailia, Egypt Abstract The influence of gamma irradiation on the electrical and dielectric properties of AgNO3/ PVA films was investigated. The films were prepared by in-situ chemical reduction techniques, then irradiated with different gamma doses (25, 50, 75, 100

polarization will increase the dielectric constant as well as the dielectric loss of the composites. As shown in Figure 4(b), the dielectric loss tangent of the BT/SR composites is larger than that of the pure SR at low frequency. In addition, the dielectric loss displays a sharp decrease at a low frequency (lower than 1 kHz), caused by the DC leakage current. However, the electrode polarization can be excluded as there is no simultaneous decrease in the dielectric constant and dielectric loss with increasing

Sensing and Instrumentation Case Study Properties, Processing and Applications of Capacitance Sensors: A Case Study of Capacitance Micrometry Stephen Grant – 01267044 2014 Abstract This is a case study that looks in detail at the properties, process and application of capacitance micrometers. The fundamentals and designs of capacitance micrometers are analyzed in detail in order to assess their viable use within industry. Suitable comparisons with alternatives to capacitance micrometry

Chapter 3 Overview of Microstrip Antenna 3.1 Microstrip Antenna A microstrip antenna consists of conducting patch and a ground plane separated by dielectric substrate. This concept was undeveloped until the revolution in electronic circuit miniaturization and large-scale integration in 1970. The early work of Munson on microstrip antennas for use as a low profile flush mounted antennas on rockets and missiles showed that this was a practical concept for use in many antenna

NMIT. Student Name: Omar Merhi Subject Name: Maintain network protection and control systems (complex) Assignment topic: Safe disposal of insulation Material Assignment Number: 1 Date: 30/3/11 Number of pages: 4 Teacher: Craig Tooke Safe Disposal of Insulation Material There have been various types of Insulating materials used within the electrical power industry since the beginning of electrical power. And over the years scientist and environmentalist have discovered that most if not all insulating

deposition or receptor immobilization. However, the applications of Si/SiO2 based biochemical sensors are limited since these devices, when in aqueous solutions, suffer from various difficulties such as chemical instability and degradation of gate dielectrics. Na+ or K+ ions from physiological buffer can diffuse into SiO2 and contribute to mobile charges. These mobile ions can be driven by the applied electrical field, causing a variable drift in the transistor threshold voltage. This drift results in

Structure, Photoluminescence and electrical properties of PVA-Ag nanocomposite films A .G. El-Shamy, and W. Attia and K.M.Abd El-Kader *, Physics Department, Faculty of Science, Suez Canal University, Ismailia, Egypt ABSTRACT In the present work, PVA-Ag nanocomposite films with thickness 0.18 mm, constant silver content (0.4 wt. %) and different time of reactions (0.1, 3, 5, 7, 9 h) were prepared by chemical reduction methods. Structure, surface topology, photoluminescence and electrical

Our world has become infatuated with the idea of “fast, easy, and comfortable” consumption. We’ve grown accustomed to accommodating a fast pace lifestyle but we have forgotten about the repercussions of our actions. So many products have become “single use” or disposable, from our individually wrapped food to our hygiene products. Since the discovery of plastic it has become the go to material of choice due to its cheap price of production. Unfortunately because of its high production rate and the