自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第36卷    第4期    总第164期    2005年8月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2005)04-0566-05
R2O-MO-Al2O3-SiO2玻璃的组成
与其热膨胀系数的关系
肖卓豪,卢安贤

(中南大学材料科学与工程学院,湖南长沙,410083)

摘 要: 采用传统熔体冷却方法制得R2O-MO-Al2O3-SiO2多元系统玻璃(R为碱金属元素,M为碱土金属元素),玻璃组成(质量分数)为:SiO2, 55.0%~65.0%; MgO,0~15.2%; CaO,0~15.2%; SrO,0~15.2%;BaO,0~15.2%;Na2O,0~15.6%;K2O,0~15.6%。通过比较不同组成玻璃的热膨胀系数,讨论该体系玻璃组成与其热膨胀系数之间的关系。研究结果表明:当玻璃中碱金属氧化物的质量分数大于17.8%时,玻璃的热膨胀系数迅速增大;对于具有相同含量的不同碱土金属的玻璃,其热膨胀系数随着碱土金属原子半径的增大而增大;当2种以上不同碱土金属共存时,热膨胀系数呈现明显的混合碱效应;当Li,Na和K 3种碱金属共存时,玻璃的热膨胀系数与组成的关系曲线出现2个极小点,且出现负的混合碱效应。

 

关键字: 玻璃;热膨胀系数;混合碱效应

Relationship between thermal expansion coefficient
and composition of R2O-MO-Al2O3-SiO2system glass
XIAO Zhuo-hao, LU An-xian

School of Materials Science and Engineering, Central South University,
Changsha 410083, China

Abstract:The R2O-MO-Al2O3-SiO2system glass was prepared by conventional melt quenching technology(R stands for alkali-earth element, M stands for alkali-metal element) and the composition range(in mass fraction) of the glass is as follows: SiO2, 55.0%~65.0%; MgO, 0~15.2%; CaO, 0~15.2%; SrO, 0~15.2%; BaO, 0~15.2%; Na2O, 0~15.6%; K2O, 0~15.6%. The relationship between the composition and the thermal expansion coefficient of the glass was investigated by comparing the thermal expansion coefficients of the glass with different chemical compositions. The results show that the thermal expansion coefficient of the glass increases sharply when the mass fraction of alkali-metal oxide is more than 17.8%; when introducing different kinds but the same quantity of alkali-earth metal oxide, the thermal expansion coefficient of the glass increases obviously with increasing the radius of alkali-earth metal ions; the mixed alkali effect appears when the glass contains a few kinds of alkali-earth metal oxides; when K+, Na+and Li+exist simultaneously in the glass, the two minimum peaks and complex mixed alkali effect can be observed from the composition-thermal expansion coefficient curve.

 

Key words: glass; thermal expansion coefficient; mixed alkali effect

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号