ISO 719:2020 玻璃 玻璃晶粒在98℃下的耐水解性 试验方法和分类

标准编号：ISO 719:2020

中文名称：玻璃 玻璃晶粒在98℃下的耐水解性 试验方法和分类

英文名称：Glass — Hydrolytic resistance of glass grains at 98 °C — Method of test and classification

发布日期：2020-09

标准范围

本文件规定a） 一种在98°C下测定玻璃颗粒耐水解性的方法。通过滴定从单位质量玻璃中提取的碱所需的酸的体积来测量和表示该耐水性，也可以通过与该体积酸相当的氧化钠的量来表示，以及b） 根据本文件方法确定的耐水解性对玻璃进行分类。本文件适用于耐腐蚀性较差的玻璃，如钠钙玻璃。注1:对于更耐磨的玻璃，例如硼硅酸盐玻璃，ISO 720中规定的方法更适合。注2:需要强调的是，本文件中规定的分类与ISO 720中规定的分类之间没有确切的相关性，因此，有必要确定使用的分类。

This document specifiesa) a method for determining the hydrolytic resistance of glass grains at 98 °C. The resistance is measured and expressed by the volume of acid required for titration of the alkali extracted from the unit mass of glass, and can also be expressed by the amount of sodium oxide equivalent to this volume of acid, andb) a classification of glass according to the hydrolytic resistance determined by the method of this document.This document is intended for use on the less resistant types of glass, such as soda-lime glass.NOTE 1 For the more resistant glasses, e.g. borosilicate glass, the method specified in ISO 720 is more suited.NOTE 2 It is emphasized that there is no exact correlation between the classification laid down in this document and that laid down in ISO 720, and it is, therefore, essential to identify which classification is being used.

标准预览图