Kayed, Tarek Said

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https://hdl.handle.net/20.500.14411/8435
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Kayed, Tarek S.
T.,Kayed
K., Tarek Said
T.S.Kayed
Kayed, Tarek Said
T., Kayed
Tarek Said, Kayed
K.,Tarek Said
Kayed,T.S.
Kayed, TS
Kayed, T. S.
Kayed, TS
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Doçent Doktor
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Department of Electrical & Electronics Engineering
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Former Staff
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24

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21

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5/0

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0

WoS Citation Count

205

Scopus Citation Count

214

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8

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9

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0

WoS Citations per Publication

8.54

Scopus Citations per Publication

8.92

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0

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0

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Crystal Research and Technology4
Materials Research Bulletin2
Journal of Alloys and Compounds2
Journal of Electronic Materials2
physica status solidi (b)2
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Author: Mergen, ASubject: X-ray diffraction

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    Article
    Citation - WoS: 42
    Citation - Scopus: 41
    Synthesis and Characterization of Mg2b2<
    (Pergamon-elsevier Science Ltd, 2005) Qasrawi, AF; Kayed, TS; Mergen, A; Gürü, M
    Magnesium borate of the form Mg2B2O5 has been prepared and its structural and thermal properties were studied using X-ray diffraction and differential thermal analysis. An investigation of the electrical and optical properties of Mg2B2O5 system has been carried out. The electrical resistivity of the sample was measured in the temperature range of 170-400 K. The data analysis revealed an extrinsic nature of the conductivity with two impurity levels located at 0.13 and 0.71 eV in the temperature ranges of 170-230 K and 240-400 K, respectively. The optical transmission and reflection was recorded at 300 K in the incident photon energy range of 3.0-6.0 eV. The absorption coefficient data analysis revealed an indirect optical energy band gap of 4.73 eV. In addition, two impurity levels located at 3.43, and 4.49 eV were observed in the absorption spectra. (c) 2005 Elsevier Ltd. All rights reserved.