Influence of silicon substitution on the properties of lithium ferrite
| Autor: | Vivek Verma, R.K. Kotnala, P. C. Kothari, Vibhav Pandey, Hari Kishan, Nitender Kumar |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Silicon Mechanical Engineering Beta ferrite Metals and Alloys Analytical chemistry chemistry.chemical_element Dielectric Coercivity Nuclear magnetic resonance chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Dissipation factor Ferrite (magnet) Dielectric loss Ceramic |
| Zdroj: | Journal of Alloys and Compounds. 443:178-181 |
| ISSN: | 0925-8388 |
| Popis: | Silicon substituted lithium ferrite of different compositions (Li 0.5(1+ x ) Si x Fe 2.5−1.5 x O 4 ) were prepared for x = 0–0.6 by ceramic standard technique. The magnetic and electrical properties of synthesized samples have been determined. A structural characterization of all the samples was conducted by the X-ray diffraction technique. The grain size ranging from 5.5 to 16 μm were studied with respect to compositions by SEM pictures. The maximum value 75.23 emu/g of saturation magnetization of silicon substituted lithium ferrite at x = 0.4 molar concentration of silicon was observed. The measured real part of dielectric constant ( ɛ ′) and loss tangent (tan δ ) of mixed Li–Si ferrite decreases with increasing silicon concentration in ferrite. Such variations in dielectric properties are due of Fe 2+ and Fe 3+ concentrations on octahedral sites and electronic hopping frequency between Fe 2+ and Fe 3+ ions. |
| Databáze: | OpenAIRE |
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