PbO-PbBr_2-PbF_2-P_2O_5系统高密度低熔融温度玻璃的研究  

New High Density and Low Melting Glasses in the PbO PbBr 2 PbF 2 P 2O 5 Quaternary System

作　　者：赵宏生[1] 周万城[1] 

机构地区：[1]西北工业大学

出　　处：《西北工业大学学报》1999年第2期216-220,共5页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金

摘　　要：研究了ＰｂＯ－ＰｂＢｒ２－ＰｂＦ２－Ｐ２Ｏ５系统的玻璃形成能力，并探索出了玻璃形成区。测试了一些玻璃的特征温度、密度和紫外截止波长。实验结果表明ＰｂＢｒ２－ＰｂＦ２－Ｐ２Ｏ５系统的玻璃形成能力很强，加入１０ｍｏｌ％的ＰｂＯ可以提高玻璃的密度并降低玻璃转变温度。当Ｐ２Ｏ５的含量小于４０ｍｏｌ％时，玻璃的密度在５．１０～５．８１ｇ／ｃｍ３之间；Ｔｇ可降至２１０℃。ＰｂＦ２－Ｐ２Ｏ５二元玻璃的紫外截止波长约为２７３ｎｍ，加入ＰｂＢｒ２使玻璃的紫外截止波长向长波方向移动。Good host material is a prerequisite for making good quality optical glasses. We present new high density and low melting glasses as promising good host materials. We prepared and characterized a series of new glasses in the PbO PbBr 2 PbF 2 P 2O 5 quaternary system. We explored the glass forming regions and studied the stabilities of the glasses against crystallization. We measured densities, characteristic temperatures, and UV/Visible transmittances of the glasses. Results show that the PbBr 2 PbF 2 P 2O 5 ternary system has a broad glass forming region which extends down to 30 mol% P 2O 5. Most of the glasses in this system show strong stabilities against crystallization. For glasses containing 40 mol% of P 2O 5 or less, the density can be up to 5.1 g/cm 3 and the glass transition temperature can be below 250℃. When we introduced 10 mol% PbO into PbBr 2 PbF 2 P 2O 5 system, the glass forming region becomes relatively smaller while the stabilities of the glasses against crystallization are still strong. Glasses in the PbO PbBr 2 PbF 2 P 2O 5 system have densities up to 5.8 g/cm 3 and glass transition temperatures as low as 210℃.

关 键 词：磷酸盐玻璃 玻璃形成区 低熔融温度 高密度 

分 类 号：TQ171.717[化学工程—玻璃工业]