Structural and acoustic investigations of calcium borate glasses

Abstract

Acoustic and structural properties of x CaO · (1–x ) B2O3 (0.2 ≤ x ≥ 0.7) glass system have been studied at ambient temperature. The ultrasonic velocity and attenuation for different compositions of calcium borate glasses were measured at 5 MHz at room temperature (303 K) using a pulse echo overlap method. The elastic moduli, Debye temperature, Poisson's ratio and other acoustic parameters have been obtained from experimental data. Fourier transform infrared spectroscopic analysis has been used to further support the results of acoustic studies. The results obtained indicate that the calcium oxide enters the glass network as a modifier by occupying the interstitial spaces in the network and by increasing the nonbridging oxygen atoms (NBOs). (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Effect of modifiers field strength on optical, structural and mechanical properties of lanthanum borosilicate glasses

“…These properties of glasses indispensably depend upon its composition and local structure [2][3][4]. In general every glass contains glass former as well as glass modifier.…”

Short belt-like Ca2B2O5·H2O nanostructures: Hydrothermal formation, FT-IR, thermal decomposition, and optical properties

“…Metal borates, such as aluminum borate [12][13][14], magnesium borate [15,16], and barium borate [17][18][19], are remarkable ceramic materials with excellent mechanical properties. Among various metal borates, calcium borates with various chemical compositions have been paid great attention in recent years owing to their great potential applications for glass fibers, antiwear additive, ceramic coatings, porcelain enamel, optics materials, fire retardant, dielectric devices, ultraviolet light sources, light emission diodes, and luminescent phosphors [20][21][22][23][24][25][26][27].…”

Synthesis and Optical Characterization of Silver Doped Sodium Borate Glasses

“…Pure borate glass is made up of random network of boroxyl units with boron in three-fold co-ordination (BO 3 ). The addition of modifier helps in forming BO 4 groups and non bridging oxygen, so increase of the non-bridging oxygen leads to open the network structure and the increase of durability [6,7]. The objective of this work is to through light into the optical characterization of silver ion doped sodium borate glasses by recording IR and UV-VIS spectra.…”