PbBr_(2)-PbCl_(2)-PbF_(2)-PbO-P_(2)O_(5)系统玻璃的热性质和化学稳定性  

Thermal Properties and Water Durability of Glasses in the PbBr_(2)-PbCl_(2)-PbF_(2)-PbO-P_(2)O_(5) System

作　　者：朱冬梅[1] 周万城[1] 赵宏生[1] 吴静波 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《无机材料学报》2000年第2期243-248,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金资助项目(59772005)

摘　　要：重点研究了ＰｂＢｒ２－ＰｂＣｌ２－ＰｂＦ２－ＰｂＯ－Ｐ２Ｏ５系统玻璃的热性质、耐水性和抗潮解性．结果表明：该系统玻璃的热膨胀系数较大，一般在 ２５×１０－６°Ｃ－１左右． ＰｂＢｒ２－ＰｂＣｌ２－Ｐ２Ｏ５系统的玻璃具有较低的玻璃转变温度，可低达 １４６℃．加入 ＰｂＦ２和／或 ＰｂＯ可显著提高玻璃的转变温度和密度，其中 ＰｂＯ对试样的影响更为显著． ＰｂＢｒ２－ＰｂＣｌ２－ＰｂＦ２－ＰｂＯ－Ｐ２Ｏ５系统玻璃的抗潮解性一般较好。多数玻璃在水中的溶解速率可达１０－５ｍｍ／ｄａｙ，具有较好的耐水性．A series of new glasses in the PbBr2-PbCl2-PbF2-PbO-P2O5 system were prepared and some properties of the glasses in the PbBr2-PbCl2-PbF2-PbO-P2O5 system were studied. Their composition dependence of glass transition temperature(Tg), thermal expansion coefficient and water durability was reported. Glasses in the PbBr2-PbBr2-P2O5 ternary system have relative low glass transition temperature(>146℃). When PbO and/or PbF2 are introduced into the ternary system, the glass transition temperature increases considerably. Glasses containing PbO have higher transition temperature than those containing PbF2. The glasses in this system have relative high thermal expansion coefficient(25 x 10-6/℃). Most of the glasses exhibit good water durability, and the dissolution rate in deionised water at 25℃ is in the order of 10-4 ~10-5mm/day. The introduction of PbO and/or PbF2 into the glasses does not change their water durability much. With the increase of P2O5, the water durability of the glass becomes bad obviously.

关 键 词：磷酸盐玻璃 热性质 化学稳定性 

分 类 号：TQ171.717[化学工程—玻璃工业] TQ171.112[化学工程—硅酸盐工业]