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

SrO–Sb₂O₃–P₂O₅ glass system was prepared by high temperature melting method. The effects of Sb₂O₃ and P₂O₅ content on the structure, thermal behavior and chemical durability of the glasses were studied by infrared spectrometer, thermal dilatometer, differential thermal analyzer and constant temperature water bath heating. It can be concluded that the characteristic temperatures of the glasses increased firstly and then decreased with the increasing of Sb₂O₃ content, whereas the tendency of the coefficient of thermal expansion (CTE) varied inversely. The crystallization ability of the glasses was significantly increased and the water resistance was reduced for Sb₂O₃ content of 35 mol % and 40 mol %. The glasses with 20 mol %, 25 mol % and 30 mol % Sb₂O₃ showed better performance in every respect than the others and the glasses containing 25 mol % Sb₂O₃, characterized by the best performance, can be chosen as host glasses for further research.