Mixed alkali effect in optical properties of lithium–potassium bismuth borate glass system

Agarwal, Ashish; Seth, V. P.; Sanghi, Sujata; Gahlot, Pardeep; Khasa, Satish

doi:10.1016/j.matlet.2003.06.007

Cited by 33 publications

(14 citation statements)

References 24 publications

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“…5 represents the Tauc's plots {(˛h ) 1/2 vs h } for different glass samples. Similar behavior was also observed by other workers [35,36]. The values of the indirect optical energy gap, E opt , thus obtained from the extrapolation of the linear region of Tauc's plots are presented in Table 3.…”

Section: Glass Compositionsupporting

confidence: 86%

Physical and optical studies in mixed alkali borate glasses with three types of alkali ions

Samee

Awasthi

Shripathi

et al. 2011

Journal of Alloys and Compounds

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Section: Glass Compositionsupporting

confidence: 86%

Physical and optical studies in mixed alkali borate glasses with three types of alkali ions

Samee

Awasthi

Shripathi

et al. 2011

Journal of Alloys and Compounds

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“…Similar behavior was also observed by other workers [4,5].The variation of the direct and indirect band gap energy (E opt ) with the compositional parameter is shown in Fig. 5 and 6.…”

Section: X=5supporting

confidence: 88%

Spectroscopic Studies on Li2O-K2O-MgO-BaO-B2O3 Glasses

G.Srinivas¹

2015

IJIRSET

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ABSTRACT:Mixed alkali alkaline earth oxide borate glasses of composition (15-x)Li 2 O-(15-x)K 2 O-(15-x)MgO-(15-x)BaO-(40+4x)B 2 O 3 with x = 0, 2.5, 5, 7.5, and 10 mol% were prepared bymelt quenching method. X-ray diffractions studies on all the glass samples were made recorded at room temperature. Peak free X-ray spectra confirmed the amorphous nature of the glasses. Spectroscopic studies like Optical absorption and FTIR are carried out at room temperature.Optical absorption spectra are recorded in the wavelength range from 200nm -1000nm.From the optical absorption studies the values of the optical band (E opt ) for indirect, direct transition and Urbarch energy (∆E) have been evaluated. The values of E opt, ∆E and density also show non linear behaviour with the compositional parameter, which also support the mixed alkali-alkaline effect in the present glass system.From FTIRspectra it isevident that present glasses consists of trigonal BO 3 and tetrahedral BO 4 structural units. The band~1360 cm -1 indicated the presence of tetrahedrally coordinated boron in the glass structure. The bands at 924cm -1 and 1024cm-1 suggest the presence of tri, tetra, penta and diborate units of BO 4 groups. The absence of band ~806cm -1 indicated the absence of boroxol rings in present glass system. The bands around 694cm -1 might be due to formation of bridges by oxygen between twotrigonal atoms.

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“…The non-linear variation of E opt and also Urbach energy, E with concentration (x) is an indication of the MAE in this glass system. Similar variations were observed in some mixed alkali borate glasses [27][28][29]. In the present glass system the absorption edges for different mol% of x are tabulated in Table 3.…”

Section: Optical Absorption Studiessupporting

confidence: 83%

Characterization and optical absorption studies of VO2+:Li2O–K2O–Bi2O3–B2O3 glass system

Subhadra

Kistaiah

2010

Journal of Alloys and Compounds

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Mixed alkali effect in optical properties of lithium–potassium bismuth borate glass system

Cited by 33 publications

References 24 publications

Physical and optical studies in mixed alkali borate glasses with three types of alkali ions

Physical and optical studies in mixed alkali borate glasses with three types of alkali ions

Spectroscopic Studies on Li2O-K2O-MgO-BaO-B2O3 Glasses

Characterization and optical absorption studies of VO2+:Li2O–K2O–Bi2O3–B2O3 glass system

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