Yazar "Icelli, Orhan" seçeneğine göre listele

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    Computation of EABF and EBF for basalt rock samples
    (Elsevier Science Bv, 2015) Karabul, Yasar; Susam, Lidya Amon; Icelli, Orhan; Eyecioglu, Onder
    In this study, certain photon absorption parameters including the energy absorption buildup factor (EABF) and exposure buildup factor (EBF) have been investigated for three different basalt samples collected from different parts of Van city. Radiation shielding properties of the basalt samples indicated a strong correlation between photon energy absorption parameters and values of EABF and EBF of basalt samples. It was found that EABF and EBF parameters are related to radiation shielding properties of basalt samples. A new method and algorithm based on ZXCOM was used. Instead of calculating G-P fitting parameters for every effective atomic number (Z(eff)), EABF and EBF were calculated for Z(eff) by interpolation, using ANSI/ANS 6.4.3 standard data available for Z(eff). (C) 2015 Elsevier B.V. All rights reserved.
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    Electrical and Mechanical Properties of LDPE/PANI Composites
    (Amer Scientific Publishers, 2016) Alkan, Ümit; Kılıç, Mehmet; Karabul, Yaşar; Yamak, Hale Berber; Okutan, Mustafa; Icelli, Orhan
    The thermal, mechanical and dielectric properties of Low Density Polyethylene/Polyaniline (LDPE/PANI) composites filled were investigated. LDPE/PANI composites were prepared using different weight percentage of PANI by compression molded in an electrically heated press. An objective of this study was to investigate dielectric and mechanical proprieties of LDPE/PANI composite films. The samples were characterized by Fourier-transform infrared spectroscopy analysis (FT-IR), tensile tests, thermogravimetry/differential thermogravimetry (TG/DTA) analysis and dielectric measurements. The FT-IR spectrum showed that PANI remained doped in the composite, and this improved the dielectric and mechanical proprieties of LDPE/PANI composite films. As compared to the mechanical and dielectric properties of pure LDPE, LDPE/0.7 wt% PANI composites have been found to have better mechanical and dielectric properties. The real (epsilon') and the imaginary parts (epsilon '') of the complex dielectric constant were measured in the frequency range of 100 Hz-10(6) Hz at room temperature (RT).
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    Polypropylene/basalt thick film composites: structural, mechanical and dielectric properties
    (Walter De Gruyter Gmbh, 2017) Alkan, Ümit; Karabul, Yaşar; Bulgurcuoglu, Ayşe Evrim; Kılıç, Mehmet; Özdemir, Zeynep Güven; Icelli, Orhan
    In this work, polypropylene/volcanic basalt rock (PP/VBR) thick film composites with different VBR powder mass ratio varying from 0.5 wt.% to 20.0 wt.% were prepared by using the hot press technique. The effects of VBR powder doping on mechanical, structural and dielectric properties of PP were investigated by stress- strain measurements, Fourier transform infrared analysis, thermal gravimetric analysis, scanning electron microscopy and dielectric spectroscopy methods. The highest tensile strength, percentage strain and energy at break were achieved for 0.5 wt.% VBR powder doped PP composite. According to the stress- percentage strain curves of the samples, it was observed that 0.5 wt.% VBR powder doping increases the mechanical performance of PP polymer. In addition, regardless of the doping concentration level of basalt powder, the real part of complex dielectric function (epsilon') of all PP composites display approximately frequency independent behavior between 100 Hz and 1 MHz. On the other hand, 0.5 wt.% VBR powder doped PP composite has also the lowest dielectric constant at the vicinity of 2.7 between 100 Hz and 1 MHz. The composite also has considerably low dielectric loss which has a crucial importance for technological applications. For these reasons, PP/0.5 wt.% VBR composite with the highest tensile strength can be considered as a suitable candidate for microelectronic devices. Furthermore, the alternative current conductivity mechanism was determined as nearly constant loss due to approximately constant dielectric loss between 10 Hz and 1 MHz.
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    Structure and Impedance Properties of Some Basalt Materials Under Magnetic Field
    (Amer Scientific Publishers, 2016) Çınar, Meltem; Kılıç, Mehmet; Karabul, Yaşar; Canlı, Nimet Yılmaz; Alkan, Ümit; Okutan, Mustafa; Icelli, Orhan
    Volcanic basalt rocks are collected from different chemical compound, that is dark colored and comparatively rich in iron and magnesium, which is located at almost every country in the world. This study examined two different basalt samples collected from different regions of Van province in Turkey. The dielectric dispersion properties of the some Basalt rocks coded Sample 1 and Sample 2 were analyzed in order to determine the parameters such as surface conductivity, dissipation factor and complex dielectric functions. Morphological analysis, particle size measurement and electrical impedance analyzer measurements were assessed in order to determine dielectric constant, dielectric loss, dielectric strength and relaxation time. The research has revealed that due to its high dielectric dissipation and factor high resistance, Sample 1 can be used a precious material in numerous industrial applications that involve electromagnetic shielding or electrostatic dissipation applications.