High‐Temperature Investigation of TeO₂–Na₂O–ZnO Glasses

Abstract

Herein, a ternary system of TeO2–ZnO–Na2O (TZN) with competitive roles of covalent Zn–O and ionic Na–O bonds in tellurite glassy network is examined for high‐temperature in situ X‐ray diffraction (XRD) and Raman spectroscopy. TZN glasses are doped with Nd2O3 and the effects of Nd doping on the crystallization of glasses are also written. In situ high‐temperature XRD permits the assignment of each of the differential scanning calorimetry (DSC) crystallization peaks (the first crystallization peak (T c1) is related to sodium‐based crystalline phases, while the second crystallization peak (T c2) is correlated with tellurium‐/zinc‐based crystalline phases). The study of in situ high‐temperature Raman spectroscopy shows that T c1 shows γ‐TeO2 crystallized phase‐like peaks while T c2 crystallization has more α‐TeO2‐crystallized phase‐like peaks. Comparison at the same temperature (430 °C) permits a first understanding of the structural changes of the glasses in terms of the evolution first to α‐TeO2, ZnO, ZnTeO3, and Zn2Te3O8 crystalline phases compared with Na10Zn4O9 phase. The ZnTeO3 and Zn2Te3O8 crystallization evolution is also compared between the Nd‐doped and nondoped glasses, which gives more insight into the tellurite glass structures.

The effect of MnCO3 on the gain coefficient for the 4I13/2 → 4I15/2 transition of Er3+ ions and near-infrared emission bandwidth flatness of Er3+/Tm3+/Yb3+ co-doped barium zinc silicate glasses

“…13,23 The addition of MnCO 3 compound into the host glass efficiently promotes not only the formation of the Mn 2+ -Yb 3+ dimer but also contributes to breaking of the O-Zn, Si-O, Si-O-Si, Zn-O-Zn, and Si-O-Zn bonds, 33 subsequently creating new non-bridging oxygens (NBOs), like Mn-O, Mn-Si, Si-O-Mn, Mn-O-Mn, and Mn-O-Zn bonds. 34,35 Therefore, we believe that the presence of Mn 2+ ions in the MnCO 3 compound contributed to shiing the NIR emission peak at the 4 I 13/2 / 4 I 15/2 transition of Er 3+ ions.…”

Synthesis and magnetic properties of zinc-tellurite glasses activated by magnetite nanoparticles

“…For this purpose, ZnO is often used [2,3]. Simultaneous addition of several various oxides into double TeO 2 −ZnO system is a perspective method for modification of physical property of glasses [4,5].…”

Синтез И Магнитные Свойства Цинк-Теллуритных Стекол, Активированных Наночастицами Магнетита

“…Часто с такой целью используют оксид цинка ZnO [2,3]. Перспективным методом модификации физических свойств стекол является одновременное добавление в состав нескольких оксидов различных химических элементов в состав двойной системы TeO 2 −ZnO [4,5].…”