Structure of Bi₂O₃-ZnO-B₂O₃ system low-melting sealing glass

来源期刊：中南大学学报(英文版)2010年第2期

论文作者：何峰 程金树 邓大伟 王俊

文章页码：257 - 262

Key words：Bi₂O₃-ZnO-B₂O₃ system glass; low-melting sealing glass; transition temperature; softening temperature

Abstract: Bi₂O₃-ZnO-B₂O₃ system glass is a kind of lead-free low melting sealing glasses. The structure of Bi₂O₃-ZnO-B₂O₃ system low-melting sealing glass was investigated by DSC, FT-IR, XRD and SEM. The results show that with the increase of B₂O₃ content, the transition temperature T_g and softening temperature T_f of Bi₂O₃-ZnO-B₂O₃ system low-melting sealing glasses increase, which leads to the liquid phase precipitation temperature increasing and promotes the structure stability in the glass. With increasing the heat treatment temperature, a large number of liquid phases appear in samples and the sinter efficiency of the samples increases. The FT-IR spectra of the glasses show the presence of some bands that are assigned to vibrations of Bi—O bond from [BO₃] pyramidal and [BiO₆] octahedral units and B—O from [BO₃] and [BO₄] units. With the decrease of B₂O₃ content, the crystallization tendency of the glass increases. In glass samples B₁ and B₂, crystallization starts at 460 ℃ and 540 ℃, respectively. Both of them precipitate Bi₂₄B₂O₃₉ phases.

基金信息：the National Natural Science Foundation of China