Effect of Bi2O3 on structure and properties of zinc bismuth phosphate glass

Abstract

Various glasses with different compositions (50 -2x)ZnO-xBi2O3-(50 + x)P2O5 (x = 0 -20 mol%) were prepared. This study examined the effect of the structure and properties in phosphate glass system according to the change in Bi2O3 content in ZnO-Bi2O3-P2O5 glass. The structure of the glasses was analyzed by Fourier transform infrared (FT-IR) analysis. The FTIR spectra were recorded in the spectral range from 400 to 1400 cm -1 . The structural investigations based on these spectra showed the rapid depolymerization of the phosphate chains with increasing Bi2O3 content along with the formation of P-O-Bi bonds. The density, glass transition temperature (Tg), molar volume and optical properties of the glasses were determined from the structural changes in the glasses. Tg, density and molar volume increased with increasing in Bi2O3 content in the glass. The optical absorption edge (λ cut-off) and optical band gap (Eg) were determined from the optical transmittance spectra of the polished samples recorded at room temperature, and found to be associated with structural changes occurring in these glasses with increasing Bi2O3 content.

I-129 Waste form Using Bi-Zn-P-Oxide Glass

“…Study on Na 2 O-Bi 2 O 3 -Al 2 O 3 -P 2 O 5 glass systems reported that the addition of Bi 2 O 3 instead of Al 2 O 3 improved chemical durability of sodium phosphate glasses since Bi 3+ contributed to the glass network similar to Al 3+ [10]. In addition, it is reported that the chemical durability of phosphate glass was improved by the addition of ZnO due to the network modifying behavior of ZnO [11]. Based on these facts, our first selection was Bi 2 O 3 -ZnO-P 2 O 5 glass system.…”

“…Peak identification reveals that the peak pattern corresponds to bismuth phosphate, BiPO 4 . This result indicates that Bi 2 O 3 in phosphate glass plays a role of network former by forming BiO 6 octahedra, but the effect decreases if the content of Bi 2 O 3 is more than 20 mol% [11]. TGA analysis of the additive added glasses was performed to examine the volatile characteristics of the glasses.…”

Effect of Bi2O3 proportion on physical, structural and electrical properties of zinc bismuth phosphate glasses

“…Accordingly, Young et al [13] reported the characteristic features of the Zn(PO 3 ) 2 glasses which consists of PO 2 asymmetric stretching vibration band (υ as ) at 1265 cm −1 , PO 2 symmetric stretching vibration band (υ s ) at 1220 cm -1 , the stretching P-O − groups [chain terminators] at 1105 and 1005 cm −1 , the υ as and υ s of P-O-P groups at 925 and 755 cm −1 respectively and the deformation modes of P-O − (PO 4 3− ) groups at 480 cm −1 . There are slight variations in the band positions of the present work when compared to previous work [13] and these variations are probably due to compositional and/or mode of preparation changes. James et al [25] observed the band at 1390 cm −1 for P = O bonds of pure anhydrous V-P 2 O 5 .…”

“…Studies of ZnO-Bi 2 O 3 -P 2 O 5 ternary glasses reported that the addition of Bi 2 O 3 incorporated in the glass network resulting structural changes and rapid depolymerization of the phosphate chains [13]. Some recent investigations on the role of Bi 2 O 3 on various glass matrices are available in literature [13][14][15][16][17].…”

Thermal and crystallization kinetics of yttrium‐doped phosphate‐based glasses

“…Phosphate‐based glasses have been widely investigated for biomedical applications and can provide highly useful properties such as low glass transition and melting temperatures, high thermal expansion coefficients, biocompatibility, high refractive indices and one of their most unique offerings is their controlled dissolution properties . The structural, chemical, and physical durability of phosphate glasses has been shown to be improved by the inclusion of several oxide additions such as ZnO, Fe 2 O 3 , Y 2 O 3 , Al 2 O 3 , TiO 2 and Bi 2 O 3 …”