碱金属氧化物对P_2O_5-ZnO-R_2O玻璃物化性能的影响  

Influence of alkali metal oxides on property of P_2O_5-ZnO-R_2O glass

作　　者：邹雯[1] 张垠[1] 洪重荣[1] 王定改[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《化工新型材料》2015年第6期166-168,共3页New Chemical Materials

基　　金：江苏高校优势学科建设工程资助项目

摘　　要：用传统高温熔融法制备了组成为35P2O5-50ZnO-15R2O的玻璃,研究了碱金属氧化物总摩尔量不变情况下,不同Na2O、K2O、Li2O含量对玻璃密度(ρ)、热膨胀系数(α)、玻璃转变温度(Tg)、化学稳定性及结构的影响。结果表明:随着K2O/(Na2O+K2O)比值的增大,玻璃的ρ逐渐减小,α、Tg逐渐升高。加入异种碱可以提高玻璃的耐水性。同时含有3种碱金属氧化物的玻璃的性能更加优越。玻璃由偏磷酸盐及焦磷酸盐构成。35P2O5-50ZnO-15R2 O glass were prepared by conventional melting method.The influence of different Na2 O,K2O,Li2 O contents on the density,thermal expansion coefficient,glass transition temperature,chemical stability and structure of the glass under the constant molar amount of alkali metal oxides were studied.The results indicated that with the increasing of K2O/（Na2O＋K2O）ratio,the density ofρdecreased,andαas well as Tgincreased gradually.Properties of the glass containing three alkali metal oxide were more superior.The glass was constituted by metaphosphate and pyrophosphate.

关 键 词：混合碱 热膨胀系数 玻璃转变温度 化学稳定性 

分 类 号：TQ171.1[化学工程—玻璃工业]