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Wyszukujesz frazę "Özkan, İ." wg kryterium: Autor


Wyświetlanie 1-9 z 9
Tytuł:
Utilization of Bigadiç Boron Works Waste Clay in Wall Tile Production
Autorzy:
Özkan, İ.
Powiązania:
https://bibliotekanauki.pl/articles/1030099.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
waste clay
Bigadiç boron works
wall tile production
alternative raw material
Opis:
The investigations on the use of the alternative raw materials have been always popular in the ceramic tile production. Manufacturers have been interested in this subject for both increasing product quality and decreasing production costs. In this research the Bigadiç boron works waste clay was utilized as an alternative raw material. Boron works waste clay was characterized by chemical and X-ray diffraction analyses. Ceramic characteristics were determined from pressed bodies, using four elevated firing temperatures (1040, 1060, 1080, and 1100°C) for samples with 5, 10, 15, and 20 wt% boron works waste clay additions to a commercial wall-tile batch. The physical properties of the fired tiles were evaluated in terms of water absorption, linear shrinkage, and flexural strength. Microstructural observations were performed by scanning electron microscopy analyses. Based on the technological characteristics of the resulting ceramic material, the results were discussed.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 427-429
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and Ceramic Properties of Turgutlu Clay
Autorzy:
Özkan, İ.
Powiązania:
https://bibliotekanauki.pl/articles/1030350.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Je
Opis:
The aim of this study is to characterize and determine the ceramic properties of the Turgutlu clay fired at various temperatures. For this purpose, the clay sample was first characterized by chemical analysis, X-ray diffraction, and plasticity measurements. The mineralogical composition of the Turgutlu clay was dominated by quartz, illite, mica, hematite, calcite, kaolinite, microcline, and smectite. The data obtained from plasticity tests indicated that the Turgutlu clay was very high plastic clay. To evaluate firing behaviors, pressed clay samples were fired separately at temperatures between 850 and 1100°C. Fired specimens were evaluated by water absorption, linear shrinkage, bulk density, flexural strength, X-ray diffraction, and scanning electron microscopy. Significant changes were observed such as an increase in the linear shrinkage and flexural strength together with a decrease in the water absorption above 1050°C. Based on the technological characteristics, the Turgutlu clay could be used in the manufacture of structural ceramics.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 7-9
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of Sodium Silicate Cullets by Using Trona
Autorzy:
Özkan, İ.
Powiązania:
https://bibliotekanauki.pl/articles/1398696.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.bj
Opis:
This study focuses on production and characterization of sodium silicate cullet by using trona. Sodium silicate cullets are generally produced by direct fusion of precisely measured portions of soda ash (Na₂CO₃) and quartz (SiO₂). In this study trona (Na₂CO₃· NaHCO₃· 2H₂O) was used as a source of soda ash. For this purpose trona sample was first characterized by X-ray diffraction, scanning electron microscopy, differential thermal analysis/thermal gravimetry and chemical analyses. Different batches were prepared and fused to produce sodium silicates varying in ratio Na₂O· nSiO₂. Produced samples were evaluated by X-ray diffraction and scanning electron microscopy. The results showed that trona can be used instead of soda ash to produce sodium silicate cullets.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 451-454
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recycling of Coal Ash in Production of Low Density Masonry Unit
Autorzy:
Özgül, N.
Savaşçin, M.
Özkan, İ.
Powiązania:
https://bibliotekanauki.pl/articles/1030101.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
coal ash
recycling
low density
masonry unit
Opis:
Coal ash is a residue that is created when coal is burned by power plants to produce electricity. Coal ash is one of the largest types of industrial waste and causes environmental pollution. On the other hand, coal ash is potentially a valuable source of minerals, including SiO₂, Al₂O₃, CaO, MgO, Fe₂O₃, Na₂O and K₂O. This study aims to recycle the coal ash in production of low density masonry unit. Coal ash was characterized by chemical and X-ray diffraction analyses. The batches containing different ratios of coal ash and a brick making clay were prepared and shaped by cold pressing. The pressed samples were fired at 1050 and 1100°C. The physical properties such as water absorption, apparent porosity, linear shrinkage, and bulk density were determined. Microstructural observations were performed by using scanning electron microscopy. Based on the technological characteristics; it was observed that low density masonry units can be produced by using coal ash. This study supports the responsible recycling of coal ash by distinguishing beneficial use from disposal.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 430-432
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examining with the Sintered Temperature of Mean Grain Size of $B_4C-Al-Ni$ Composites by Ultrasonic Techniques
Autorzy:
Özkan, V.
Sarpün, İ.
Powiązania:
https://bibliotekanauki.pl/articles/1490996.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.35.Ae
81.70.-q
43.35.Zc
Opis:
Hard, tough, lightweight boron-carbide-reactive metal composites, boron-carbide-aluminum composites, are produced. The ultrasonic velocity and attenuation were measured on $B_4C-Al-Ni$ ceramic-metal composites, which are sintered in the temperature range 500-1200°C, by using the pulse echo method. Ultrasonic velocity, ultrasonic attenuation and rate of screen heights of successive peaks were determined according to the pulse-echo method by using 2 MHz and 4 MHz probes. It was observed that the mean grain size of samples has been changed with the sintering temperature. The velocity was found to be pretty sample dependent at room temperature and increased with increasing sintering temperature. The ultrasonic attenuation at room temperature was found to be more sample dependent. The sintering temperature variation of ultrasonic attenuation exhibited broad minimum values around 1200C and sharp maximum values at 500°C. The increase observed in the temperature variation of longitudinal velocities and attenuation has been qualitatively explained with the help of the temperature variation of decrease value.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 184-186
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mean Grain Size and Pore Effects οn Ultrasonic Properties οf WC-Fe-Ni and SiC-Fe-Ni Composites
Autorzy:
Sarpün, İ.
Özkan, V.
Yönetken, A.
Erol, A.
Powiązania:
https://bibliotekanauki.pl/articles/1400139.pdf
Data publikacji:
2013-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.35.Ae
81.70.-q
43.35.Zc
Opis:
In this work, electroless nickel plating technique was used with WC-Fe and SiC-Fe powders. Plated powders were sintered at temperature ranging from 600C to 1100C under argon shroud in Phoenix microwave furnace. The mean grain size is determined by using three different techniques namely ultrasonic velocity, ultrasonic attenuation, and rate of screen heights of successive peaks according to the pulse-echo method by using a 2 MHz and a 4 MHz probes compared with the scanning electron microscopy images. In addition, the relative effects of porosity on ultrasonic attenuation and velocity in the WC-Fe-Ni and SiC-Fe-Ni composite samples are studied. It is seen that the ultrasonic velocity, the ultrasonic attenuation, the rate of screen heights of successive peaks have a linear relation with the mean grain size of samples. However, the correlation coefficients of porosity graphs have higher values than mean grain size graphs for the composite materials as expected. This indicates that porosity determines the ultrasonic velocity and attenuation for the composite samples.
Źródło:
Acta Physica Polonica A; 2013, 123, 4; 688-694
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recovery of trace elements with uranium and thorium from yatagan thermal power plant fly ashes by leaching
Autorzy:
Kursun, I.
Ozkan, S. G.
Kilic, A.
Terzi, M.
Enkhtaivan, N.
Powiązania:
https://bibliotekanauki.pl/articles/110591.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
uranium
thorium
leaching
fly ash
Opis:
In this paper, characterization of fly ashes obtained from the Yatagan Thermal Power plant, Mugla, Turkey was performed in order to determine their radioactive element contents, especially uranium and thorium. The representative fly ash samples were subjected to hydrochloric acid (HCl) leaching considering solid concentration, acid dosage, leaching time and temperature in order to reach certain uranium and thorium recoveries. The obtained results showed that the optimum conditions for leaching tests were: 30% solid concentration, 2.36 mmol/dm3 HCl addition, 240 min leaching time and 40 oC temperature. Dissolution efficiencies for uranium and thorium from the Yatagan Thermal Power Plant fly ashes were calculated as 90.12 and 81.18%, respectively.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 588-596
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machine-related farm injuries in Turkey
Autorzy:
Akdur, O
Ozkan, S.
Durukan, P.
Avsarogullari, L.
Koyuncu, M.
Ikizceli, I.
Powiązania:
https://bibliotekanauki.pl/articles/50182.pdf
Data publikacji:
2010
Wydawca:
Instytut Medycyny Wsi
Tematy:
agricultural worker
Turkey
accident
safety
mortality
agricultural machine
agricultural production
wound
injury
Źródło:
Annals of Agricultural and Environmental Medicine; 2010, 17, 1; 59-63
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress distribution comparisons of foot bones in patient with tibia vara : a finite element study
Autorzy:
Özkan, A.
Atmaca, H.
Mutlu, I.
Celik, T.
Ugur, L.
Kisioglu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/307337.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
tibia vara
genu varum
mechanical axis
load bearing
kość piszczelowa
kolano szpotawe
biomechanika
Opis:
Blount’s disease, or tibia vara, is the most common cause of pathologic genu varum in children and adolescents. Changes in the loading of knee structures such as tibial articular cartilage, menisci and subcondral bone are well documented in case of genu varum. But the mechanical effects of this condition on foot bones are still questionable. In this study, the authors hypothesized that stress distributions on foot bones might increase in patients with tibia vara when compared with patients who had normal lower extremity mechanical axis. Three-dimensional (3D) finite element analyses of human lower limb were used to investigate and compare the loading on foot bones in normal population and patient with tibia vara. The segmentation software, MIMICS was used to generate the 3D images of the bony structures of normal and varus malalignment lower extremity. Except the spaces between the adjacent surface of the phalanges fused, metatarsals, cuneiforms, cuboid, navicular, talus and calcaneus bones were independently developed to form foot and ankle complex. Also femur, tibia and fibula were modeled utilizing mechanical axis. ANSYS version 14 was used for mechanical tests and maximum equivalent stresses (MES) were examined. As a result of the loading conditions, in varus model MES on talus, calcaneus and cuboid were found higher than in normal model. And stress distributions changed through laterally on middle and fore foot in varus deformity model.
Źródło:
Acta of Bioengineering and Biomechanics; 2013, 15, 4; 67-72
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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