Study of structures and properties of ZnO-Sb2O3-P2O5-Na2O glasses

Abstract

The influence of ZnO substitution by 0 -12 wt.% Na 2 O on the properties of ZnO-Sb 2 O 3 -P 2 O 5 -Na 2 O glasses has been investigated. The structure and properties of the glasses with the composition of (13.86-x)ZnO-57.93Sb 2 O 3 -28.21P 2 O 5−x Na 2 O (x = 0 -12 wt.%) were characterized by infrared spectra (IR), X-ray diffraction and differential thermal analysis (DTA). The results of IR indicated an increase in the intensity of symmetric vibrations of P-O-P bond, which was confirmed by the improvement of water durability with the increasing amount of Na 2 O in the range of 0 -10 wt.%. Substitution of 10 wt.% Na 2 O led to the weight loss of the glass to 5.93 mg/cm −2 after immersion in deionized water at 50°C for 24 h. The results of XRD showed that the ability of crystallization decreased, indicating the good thermal stability of the glass. The glass containing 8 wt.% Na 2 O had the best properties in every respect and might be an alternative to lead based glasses for the applications, providing further composition improvement.

Structural and Thermal Characterization of Antimony-Phosphate Glass

“…Thus, these glasses are easy to prepare and hard to crystallize. Despite their excellent thermal stability [14], the criterion for large Hruby parameters (H r ) and (ΔT) cannot be applied to this glass system [6], according to the DTA result and glass forming ability criteria, the glass forming ability enhances with increasing Sb 2 O 3 content.…”

Preparation of ternary (35 – x)Sb2O3–xBi2O3–65P2O5 glasses for lead-free glass application

“…The stretching vibration band of P=O bond (usually at 1240 cm −1 to 1270 cm −1 and 1320 cm −1 ) is not observed, which implies that the P=O double bond is absent in the glass samples. The symmetric vibrations [10]. The absorption peak at 736 cm −1 can be attributed to symmetric vibrations of P-O-P bonds in phosphate chains [11].…”

Influence of composition on the structure and properties of SrO–Sb2O3–P2O5 low-melting sealing glasses

“…This illustrates that Sb 2 O 3 can participate in the S25 glass network in the largest extent. On the contrary, the glass samples of S35 and S40 have lower characteristic temperatures and higher CTE because in those glasses there is an excess of Sb 3+ as the network modifier, which causes the glass-network weakening [1,15]. Simultaneously, in this ternary system of phosphate glass, plenty of P 2 O 5 is replaced by Sb 2 O 3 with much lower melting point, leading to the worsening of its properties.…”

“…The band around 538 cm −1 is the absorption peak of bending vibration of P-O bonds, δ(P-O), of Q 0 tetrahedra [10]. The absorption shoulder at 629 cm −1 is caused by the vibration of P-O-Sb linkages [1,14,15]. It is obvious that for S35 and S40 the intensities of the bands at 1284 cm −1 and 775 cm −1 decreased markedly, because the excessive Sb 2 O 3 could not take part in the glass network due to inadequate free oxygen provided by SrO when the content of Sb 2 O 3 exceeded 30 mol %.…”

“…There are many advantages of sealing glasses, such as good moisture resistance, air tightness, high temperature resistance, small expansion coefficient, etc. [1]. In the past several years, most commercial sealing glasses were lead-based with large amount of PbO, which is deleterious to health and environment.…”