نتایج جستجو برای: dielectric properties

تعداد نتایج: 897612  

زرگر شوشتری, مرتضی, موسوی قهفرخی, سید ابراهیم, حسینی, شهاب ,

In this research, M- type strontium hexaferrite nanoparticles (SrFe12O19) were synthesized via combustion sol–gel technique. To determine the optimum annealing temperature, thermogravimetry-differential thermal analysis (DTA/TG) was used.  Based on the results obtained from this analysis, the powders strontium hexaferrite were annealed between temperatures 750 and 1050°C. The structural and mor...

موسوی قهفرخی, سید ابراهیم, کاظمی‌نژاد, ایرج, کیان علیخانی, راحله,

In this research, PbFe11Co1O19 with annealing temperatures of 600, 700, 750, 800, 850 and 900 ˚C at annealing time of 3 h were synthesized by sol-gel method. The structural, microstructure properties and morphology of the samples have been studied by XRD, FT-IR and FESEM. Also, magnetic and dielectric properties of samples were characterized by VSM and LCR meter. The results of measurements of ...

Room temperature dielectric and antibacterial behavior of thiosemicarbazide capped low dimension Silver and Gold nanoparticles were studied. The effect of size on the properties, by capping silver (Ag) and gold (Au) nanoparticles by thiosemicarbazide (TSC) was investigated. The nanoparticles were synthesized by chemical reduction method. The structural formation, surface morphology, phase stabi...

2016
Fabien Bibi Maud Villain Carole Guillaume Brice Sorli Nathalie Gontard

Polymers can be classified as synthetic polymers and natural polymers, and are often characterized by their most typical functions namely their high mechanical resistivity, electrical conductivity and dielectric properties. This bibliography report consists in: (i) Defining the origins of the dielectric properties of natural polymers by reviewing proteins. Despite their complex molecular chains...

سعیده رمضانی ثانی, , عبدالله مرتضی علی, ,

  We have studied the effect of increasing porosity and its microstructure surface variation on the optical and dielectric properties of porous silicon. It seems that porosity, as the surface roughness within the range of a few microns, shows quantum effect in the absorption and reflection process of porous silicon. Optical constants of porous silicon at normal incidence of light with wavelengt...

, ,

Sodium potassium niobate piezoceramics are considered as lead-free piezoelectric due to their good properties. In this study, the effect of titanium dioxide and molybdenum oxide as dopant on the densification behavior, piezoelectric and dielectric properties of lithium doped sodium potassium niobate ((K0.5Na0.5)0.94Li0.06NbO3, KNNL) was investigated. For this purpose, (K0.5Na0.5)0.94Li0.06Nb0.9...

2013
Jiajia Chen Krishnamoorthy Pitchai Sohan Birla Ricardo Gonzalez David Jones Jeyamkondan Subbiah J. Chen K. Pitchai

Temperature-dependent dielectric properties (dielectric constant and dielectric loss factor) and thermal properties (thermal conductivity and specific heat capacity) of whey protein gel and mashed potato were measured from -20°C to 100°C. A dielectric properties measurement system and a multipoint temperature calibration protocol were developed. The system consists of an impedance analyzer, a h...

M. Rashidi Huyeh, N. Moosavinejad

Nanocomposite materials, including noble metal nanoparticles embedded in a dielectric host medium, are interesting because of their optical properties linked to surface plasmon resonance phenomena. For studding of nonlinear optical properties and/or energy transfer process, these materials may be excited by ultrashort pulse laser with a temporal width varying from some femtoseconds to some hund...

M. Kalantar, M. Khaleghian, S. S. Ghasemi,

Lead zirconate titanate (PZT) as a piezoelectric ceramic has been used widely in the fields of electronics, biomedical engineering, mechatronics and thermoelectric. Although, the electrical properties of PZT ceramics is a major considerable, but the mechanical properties such as fracture strength and toughness should be improved for many applications. In this study, lead monoxide, zirconium ...

2011
A. S. Joshi

This study presents dielectric properties of North Indian Ocean seawater. In all, fourteen seawater samples are collected from Arabian Sea, Lakshadweep Sea, Tip of Bay of Bengal Sea, deep Indian Ocean and Equatorial region. The Von Hipple method is used to measure dielectric properties, both real part ε' and imaginary ε'', at 5 GHz and 30 °C using automated C-Band microwave bench set up. The di...

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