Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
The conduction mechanism of Li-Ga ferrite
Faculty
Science
Year:
2009
Type of Publication:
Article
Pages:
307-313
Authors:
Mansour, S. F, Zaki, H. M, Elmosalami, T. A, Mazen, S. A
DOI:
10.1016/j.jallcom.2008.04.068
Journal:
JOURNAL OF ALLOYS AND COMPOUNDS ELSEVIER SCIENCE SA
Volume:
472
Research Area:
Chemistry; Materials Science; Metallurgy \& Metallurgical Engineering
ISSN
ISI:000264757200058
Keywords :
Electrical conductivity, Ferrites, Li-Ga ferrites
Abstract:
Gallium substituted lithium-ferrite having the general formula Li0.5Fe2.5-xGaxO4 with 0.0 <= x <= 0.5 in steps of 0.1 were synthesized by the standard ceramic technique. The variation of DC and AC conductivities with temperature have been reported in a wide range of temperature from room temperature 293 K up to 1023 K in static air. AC measurements were carried out in a wide range of frequencies from 100 Hz up to 1 MHz. The values of activation energies for the compositions containing gallium approximately is twice the activation energy of x = 0. The electron mobility in Li0.5Fe2.5O4 shows an activation energy of 0.36 eV, while the activation energy of Li-Ga ferrites are ranging from 0.64 to 0.77 eV. These values are due to a narrow-band conduction mechanism and a formation of small polaron. (C) 2008 Elsevier B.V. All rights reserved.
Online
PDF
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف