低熔点装饰乳浊玻璃结构与性能的研究

发布时间：2018-01-14 11:43

本文关键词：低熔点装饰乳浊玻璃结构与性能的研究　出处：《武汉理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文以Na2O-CaO-SiO2系统玻璃为基础，引入磷酸盐作为乳浊剂，制备了耐水性较佳、光泽度良好、白度大于80%、热膨胀系数小于75×10-7℃-1、抗折强度大于100Mpa的无氟装饰乳浊玻璃。研究了P2O5对玻璃微观结构的影响；分析了A12O3、B2O3对玻璃微观结构和物化性能的影响；探讨了碱金属对玻璃低熔点特征性能的影响。研究结果表明：碱金属离子对玻璃低熔点起关键作用。Na2O含量从2wt%升至8wt%，其对氧离子的反极化程度逐渐增大，网络结构中化学键键力逐渐减小，，粘滞活化能Eη从244.79KJ·mol-1降至219.14KJ·mol-1，理论熔制温度降低了67℃；K2O逐步替代Na2O，后者比前者的反极化作用大，网络结构中的化学键键力逐渐增大，粘滞活化能Eη从228.47KJ·mol-1升至255.28KJ·mol-1，理论熔制温度升高了58℃。 P2O5作为乳浊剂会导致玻璃的分相尺寸呈现逐渐增大的趋势，液滴由聚集态变为离散态，液滴的形状越来越规则并趋向于完整的球形。当P2O5引入量为6wt%时，液滴尺寸平均为250nm且趋于均匀，液滴相呈现较圆润的球形；而富硅相逐渐趋于分散且相互独立存在。当P2O5引入量从4wt%增至7wt%时，玻璃的白度从73.51%增大至82.67%；抗折强度从104.56MPa增大至113.63MPa。 A12O3使得富磷相区域减小，但有助于液滴尺寸的增大。当A12O3的引入量为5wt%时较佳，液滴基本稳定在200nm左右。A12O3的含量从2wt%增至5wt%，玻璃的抗折强度从111.29MPa小幅增至114.36MPa；热膨胀系数从73.08×10-7℃-1小幅增至75.34×10-7℃-1，Tg与Tf也随之上升；密度无明显变化，保持在2.5361g/cm3至2.5541g/cm3范围内。 B2O3能够起到调节分相的作用，致使富磷网络的聚集受到了阻碍，使得液滴尺寸被抑制，从而达到调整乳浊效果的作用。在其引入含量达到6wt%时白度表现较佳，其值为84.27%。B2O3的引入量从2wt%增至8wt%；热膨胀系数从74.56×10-7℃-1增至87.67×10-7℃-1，Tg与Tf也随之降低；密度从2.5422g/cm3降至2.4981g/cm3。 Na2O引入量从2wt%升至8wt%，玻璃的热膨胀系数从63.51×10-7℃-1升至75.34×10-7℃-1，Tg与Tf也随之降低，耐水性也出现降低的倾向；K2O逐步取代Na2O，玻璃的热膨胀系数从75.34×10-7℃-1降至70.14×10-7℃-1，Tg与Tf也随之升高，在两者引入量均达到4wt%时玻璃耐水性较佳。
[Abstract]:This paper is based on the Na2O-CaO-SiO2 glass system, introducing phosphate as opacifying agent, preparation of better water resistance, good gloss, whiteness is greater than 80%, the thermal expansion coefficient is less than 75 DEG C * 10-7 -1, fluorine free decoration opaque glass flexural strength more than 100Mpa. The effect of P2O5 on Microstructure of glass; analysis of the A12O3, the influence of B2O3 on Microstructure and properties of glass; to investigate the effect of alkali metals on the properties of low melting point glass. The results show that:
Alkali metal ions play a key role in the content of.Na2O from 2wt% to 8wt% on glass with low melting point, the degree of polarization of the oxygen ions increases gradually, chemical bond force network structure decreases gradually, the viscous activation energy of E from 244.79KJ - mol-1 to 219.14KJ - mol-1 theory, the melting temperature decreased gradually 67 DEG C; K2O instead of Na2O, the latter than the former anti polarization effect, chemical bond force in the network structure increases gradually, the viscous activation energy of E from 228.47KJ to 255.28KJ, mol-1, mol-1, theory of melting temperature increased by 58 degrees.
P2O5 as opalizer will lead to glass phase separation size increasing gradually, drop by the aggregation into discrete state, shape and droplet more rules and tend to complete spherical. When P2O5 introduced was 6wt%, the average droplet size is 250nm and the uniform, spherical droplets more rounded; and the silicon rich phase tends to separate and independent existence. When P2O5 introduced from 4wt% to 7wt%, the glass whiteness increases from 73.51% to 82.67%; the flexural strength increased from 104.56MPa to 113.63MPa.
A12O3 makes the phosphorus rich phase region decreases, but increases to the droplet size. When the introduction of A12O3 quantity is 5wt% better, droplet content basically stable at around 200nm.A12O3 from 2wt% to 5wt%, the glass bending strength increased slightly from 111.29MPa 114.36MPa; thermal expansion coefficient from 73.08 * 10-7 C -1 slightly to 75.34 * 10-7 C -1, Tg and Tf also increased; no significant changes in density, remain in the 2.5361g/cm3 to 2.5541g/cm3 range.
B2O3 can play the role of regulating phase, resulting in the accumulation of phosphorus rich network is hindered, the droplet size is suppressed, so as to adjust the opacifying effect. In the introduction of 6wt% content of whiteness is better, the value for the introduction of the amount of 84.27%.B2O3 increased from 2wt% to 8wt%; thermal expansion coefficient from 74.56 to 87.67 DEG C * 10-7 -1 * 10-7 Tg Tf C -1, and decreased with the density decreased from 2.5422g/cm3 to 2.4981g/cm3.;
The intake of Na2O from 2wt% to 8wt%, the thermal expansion coefficient of glass from 63.51 * 10-7 to 75.34 * 10-7 C -1 C -1, Tg and Tf also decreased, water resistance also tends to decrease; K2O gradually replace Na2O, thermal expansion coefficient of glass from 75.34 * 10-7 to 70.14 * 10-7 C -1 C -1. Tg and Tf also increased, both in quantity is introduced to 4wt% glass water resistance is better.

【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TQ171.1

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