铝硅酸盐玻璃的渗锡特性

Tin Permeation Characteristics of Aluminum Silicate Glass

盖板玻璃(以下简称铝硅酸盐玻璃)作为显示器件的基础材料,玻璃的沾锡、渗锡现象严重影响玻璃的后加工过程与玻璃性能,本文研究了不同厚度铝硅酸盐浮法玻璃的渗锡深度、渗锡量及渗锡机理。浮法盖板玻璃厂家可通过渗锡深度及渗锡量确定一些玻璃成型工艺参数。研究发现当铝硅酸盐玻璃厚度由0.33 mm增加至1.1 mm时,渗锡深度由4μm增大至15μm。对玻璃原片、减薄1μm、减薄2μm和减薄3μm的玻璃表面进行渗锡量测试,得出玻璃由表面至内部渗锡量逐渐减少,且减少幅度逐渐降低。玻璃锡面的锡离子有Sn、Sn^(4+)和Sn^(4+)三种价态,但主要以Sn^(4+)为主,约占总渗锡量的80%,随着玻璃深度的增加,玻璃内部Sn^(4+)含量逐渐增多,但仍以Sn^(4+)为主。这种渗锡现象是由被氧化的锡离子和玻璃中的钠离子发生离子交换反应引起的。

Cover glass(hereinafter referred to asaluminosilicate glass)is the basic material for display devices.The phenomenon of tin deposition and infiltration affects the post-processing process and glass performance.We studied the tin infiltration depth,tin amount,and tin infiltration mechanism of aluminosilicate float glass with different thicknesses.Float cover glass manufacturers can determine glass forming process parameters by inferring the tin infiltration depth and tin amount.Research has found that when the thickness of aluminosilicate glass increases from 0.33 mm to 1.1 mm,the depth of tin infiltration increases from 4μm to 15μm.The tin infiltration test was conducted on the glass substrate,the glass surface with a thickness reduction of 1 micron,2 microns,and 3 microns.It was found that the tin infiltration from the surface to the interior of the glass gradually decreased,and the degree of reduction gradually decreased.The tin ions on the glass tin surface have three valence states:Sn,Sn^(2+)and Sn^(4+),but mainly Sn^(2+),accounting for about 80%of the total tin infiltration.As the depth of the glass increases,the content of Sn^(4+)inside the glass gradually increases,but still mainly Sn^(2+).This tin infiltration phenomenon is caused by an ion exchange reaction between oxidized tin ions and sodium ions in the glass.