Výsledky vyhledávání - "Mohamed El-Okr"

A comprehensive identification of optical transitions of cobalt ions in lithium borosilicate glasses

Autor: H.Y. Morshidy, M.G. Moustafa, A. Raouf Mohamed, Mohamed El-Okr

Publikováno v: Journal of Non-Crystalline Solids. 517:9-16

Exploring the materials with distinct optical properties is still in progress. Hence, Co-doped lithium borosilicate glasses of composition x Li2O–(80 – x) B2O3–19.6 SiO2–0.4 CoO (x = 5, 10, 15 and 20 mol%) were synthesized via communal melt q

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::85cc460646f9a26efb73a1b8bacb637e
https://doi.org/10.1016/j.jnoncrysol.2019.04.037

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Unraveling the hidden Urbach edge and Cr6+ optical transitions in borate glasses

Autor: F. M. Ebrahim, M. A. Hassan, M.G. Moustafa, Mohamed El-Okr, Z. M. Abd El-Fattah

Publikováno v: Journal of Non-Crystalline Solids. 515:157-164

Two alkaline-borate glass systems of composition x Li2O · 0.2 Cr2O3 · (99.8–x) B2O3 (x = 20, 30 and 40 mol%) and y K2O · (20-y) Li2O · 0.2 Cr2O3 · 79.8 B2O3 (y = 5, 10, 15 and 20 mol%) were prepared by traditional melt-quenching technique. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::323de8019a20ac0812c18342ca3edf74
https://doi.org/10.1016/j.jnoncrysol.2019.02.026

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DFT Investigation of Structural and Electronic Properties of Modified PZT

Autor: Ibrahim Bashter, Medhat Ibrahim, Mohamed El-Okr, Rageh K. Hussein

Publikováno v: Acta Chemica Iasi, Vol 27, Iss 1, Pp 15-30 (2019)

Density of states and geometrical structures of modified Lead zirconate titanate are investigated using density functional theory within local density approximation. The electronic properties and bond length variation have been studied in terms of el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8109efe449699bb55bbf8d02712e0905
https://doi.org/10.2478/achi-2019-0002

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Structural and Optical properties of P2O5-ZnO-Na2O-Li2O glasses

Autor: Lalia I. Soliman, Naglaa F. Osman, Hamdia A. Zayed, Mohamed El-Okr

Publikováno v: Journal of Scientific Research in Science. 36:19-35

The transparent glasses of composition 40P2O5-20ZnO-(40-x)Na2O-xLi2O have been prepared using conventional melt quenching technique (where 0 ≤ x ≤ 25 Li2O mol. %). The prepared glass samples were characterized by x-ray diffraction (XRD), differen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7cff2fd8363ab2bfc5fd3a0a68554b95
https://doi.org/10.21608/jsrs.2019.30995

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Synthesis and study of electrical properties of Li2O modified P2O5-ZnO-Na2O glasses

Autor: L. I. Soliman, Mohamed El-Okr, N. F. Osman, Hamdia A. Zayed

Publikováno v: Journal of Scientific Research in Science. 36:161-179

The transparent glasses of composition 40P2O5-20ZnO-(40-x)Na2O-xLi2O have been prepared using conventional melt quenching technique (where 0 ≤ x ≤ 25 Li2O mol. %). The amorphous nature of the prepared glass samples is confirmed by x-ray powder di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30628948b750286830e509b266f69491
https://doi.org/10.21608/jsrs.2019.34276

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Study of the optical properties of Li2O modified P2O5-Na2O glasses

Autor: M. E. Sayed, Hamdia A. Zayed, Mohamed El-Okr, L. I. Soliman

Publikováno v: Journal of Scientific Research in Science. 36:198-210

Optical characteristics of the prepared glasses of composition 55 P2O5 – (45-x) Na2O – x Li2O were ( 0 ≤ x ≤ 35 mol% ) have been investigated by X-Ray diffraction (XRD), differential thermal analysis (DTA), density (ρ), molar volume (Vm), op

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59cda5c459779428ee3900c678106034
https://doi.org/10.21608/jsrs.2019.34278

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Incorporation of Mn2+ into cobalt ferrite via sol–gel method: insights on induced changes in the structural, thermal, dielectric, and magnetic properties

Autor: Gharieb S. El-Sayyad, Ahmed El-ghandour, A. S. Awed, Ahmed I. El-Batal, M. I. A. Abdel Maksoud, E. K. Abdel-Khalek, A. H. Ashour, Mohamed El-Okr, Mohamed Gobara

Publikováno v: Journal of Sol-Gel Science and Technology. 90:631-642

Precise tailoring of nanostructured cobalt ferrite paves the way to design and develop devices for stress and noncontact torque sensors. Herein, Mn2+ ions are inserted into cobalt ferrite with different ratios using a facile sol–gel method. The as-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7675ff261ad829d513202aeef3fd889e
https://doi.org/10.1007/s10971-019-04964-x

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Optical properties and radiative rates of Nd3+ doped zinc-sodium phosphate glasses

Autor: Shimaa Badr, E. A. Abdel Wahab, Mohamed El-Okr, Kh. S. Shaaban, A.A. El-Maaref

Publikováno v: Journal of Rare Earths. 37:253-259

Preparation using melt quenching technique and optical characterizations of Nd3+ doped Zn-Na phosphate glasses are presented. The structure of the present glasses was studied using X-ray diffraction and FT-IR spectroscopy. UV-vis spectra of the prese

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a11736b522d9b2ac3e9c6a9b13e270b2
https://doi.org/10.1016/j.jre.2018.06.006

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