FTIR Analysis & Dielectric Constant for Some Iron Bismuth Borate Glasses
Journal Title: Drug Designing & Intellectual Properties International Journal - Year 2018, Vol 2, Issue 3
Abstract
Borate glasses contain transition metal ions are of high importance in science and technology, as solid electrolytes and electric sensors [1]. Oxide glasses, especially bismuth borate glasses, are considered as stable active ion hosts for practical applications such as optical and sensor devices, because of their high refractive index [2]. The intensive studies of rare-earth doped glasses lead to good understanding their optical properties, which in turn help to choose the host material and the emitters for lasers [3]. Glasses containing transition metal ions such as Fe, Co, V, etc. consider as semiconductors [4,5]. Electronic transport is only observed in these materials if the transition metal ion is present in two distinct sites [4]. The transport properties of oxide glasses have been of interest for a long time because of their potential application in technology. The ability of Born to exist in both three and four coordinated environments and high strength of the covalent B-O bounds, imparts borates, the ability to form stable glasses [6]. This work aims to study the effect of introduce Bi2O2 on both the refractive index and Static dielectric constant for some iron bismuth borate glasses.X-ray diffraction XRD is very useful tool for identification the order-disorder transformation, therefore it was used to check the internal structures of the studied samples. XRD patterns for the all studied samples were exhibited in Figure 1, where all sample showed same behavior. Checking Figure 1 carefully the shape shows two broad peaks have different intensities. 1st peak was positioned approximately at 2θ = 27o, this peak is of highest intensity. While the 2nd peak which of lowest intensity was positioned at 2θ = 44o. By refer to the XRD database it can state that these peaks may due to XRD by both Bi and Fe cations. Such broad peaks may refer to some small crystallites embedded in an amorphous matrix. Generally, the absence of any sharp peak means the short-range order nature of the internal structure of the studied samples. For a solid material, FTIR has an ability to characterize the order of the internal structure and building groups in addition to the chemical bonds. So, FTIR absorption spectra were recorded for all studied samples in range from 4000cm-1 to 400cm-1, as seen in Figures 2-6. Logically, it can observe that each spectrum contains multi-broad bands, each band may compose of more than one peak. Where each individual peak refers to a fixed type of vibration, which consequently characterize a certain bond or group unit. Such shapes characterize the solids own short range order structure, this observation is in an agreement with the XRD data. For more analytical study, each broadband was de-convoluted to some small peaks with different centers, then recorded in Table 1 where the band around 437cm-1 may attribute to Bi-O valence vibrations of very deformed BiO6 units [3-7] overlapping with FeO6 groups.
Authors and Affiliations
Hossam Mohammed Gomaa, Ahmed Hatim Hamdy EL-Dosokey
Keywords
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- EP ID EP592126
- DOI 10.32474/DDIPIJ.2018.02.000139
- Views 161
- Downloads 0
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