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- W2501951498 abstract "Alkali borate glasses doped with different concentrations of ferric oxide in the range 0-1 mol % in steps of 0.2 mol % have been prepared. The dielectric properties, especially dielectric constant e', loss tanδ a c conductivity σ ac over a wide range frequency (1-100 kHz) and temperature (30-300°C), ESR and IR spectra of Fe 2 O 3 containing K 2 O-BaO-B 2 O 3 glasses have been studied. The dielectric study reveals that the glasses have high insulating strength when Fe 2 O 3 concentration is 0.8 mol % in the glass matrix. The results have been analyzed in the light of different oxidation states of iron ions with the help of IR and ESR spectra data. The analysis indicates that when the concentration of iron ions is up to 0.8 mol %, these ions exist in Fe 3+ state that takes modifier as well as network former position, beyond this concentration some of the iron ions switch over from Fe 3+ to Fe 2+ state that takes network modifier positions and weakens the insulating strength of the glass." @default.
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- W2501951498 date "2011-05-01" @default.
- W2501951498 modified "2023-09-24" @default.
- W2501951498 title "Spectroscopic properties and dielectric dispersion of K 2 O-BaO-B 2 O 3 glasses doped with Fe 2 O 3" @default.
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