Conductivity and morphological studies on iron borosilicate glasses
Source abstract
Abstract
Abstract A set of glass samples of nominal composition xFe2O3.(43-x)B2O3.25SiO2.30Na2O. 2Al2O3, (x ≤ 40 mol%) was prepared via an ordinary melt quenching route. The variation of structural and electrical characteristics of the prepared samples have been studied. Electrical conduction in glasses that contain Fe2O3 (≤ 20 mol%) is considered to be ionic. Otherwise, the polaronic conduction is dominant in glasses of higher Fe2O3 concentrations (>20 mol%). Energy dispersive x-ray analysis of glass containing 5 mol% Fe2O3 showed that only one type of modifying iron ions Fe3+ present in their octahedral coordination. Besides, glasses containing higher Fe2O3 content reveal the presence of a mixture of both ferrous and ferric ions (Fe2+ & Fe3+). A fraction of both tetrahedral (BO4 and FeO4) units and BO3 groups are determined from Fourier transform infra-red spectroscopic analysis (FTIR). Increasing the fraction of tetrahedral units and decreasing BO3 are considered as the main reasons in conductivity enhancements.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Nuclear materials and radiation effects
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References (19)
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