High-borosilicate heat-resistant glass is a kind of familiar glass, expensive cost, fully meet the environmental testing standards Because of its heat resistance and resistance moment itself performance requirements of the temperature difference, high boron silicon material to replace the raw glass in a large amount of harmful heavy metals such as lead, zinc ion composition, so its brittleness and weight is far less than the life of the common ordinary glass.
1.The coefficient of thermal expansion is different
Borosilicate glass has a very low coefficient of thermal expansion, about one third of that of ordinary glass, which reduces the effect of temperature gradient stress and thus has a stronger fracture resistance.
2.Different main components
Common glass is sodium calcium silicate glass, the main component is silica; The main components of high borosilicate glass are boron trioxide and silicon dioxide. In the manufacturing process of ordinary silicate glass, sodium silicate sand, soda water and ground lime are added. High borosilicate glass can contain 14% of boron and 80% of silicon respectively, while ordinary glass is generally not added with boron.
3.Different tensile strength
The tensile strength of high borosilicate glass is higher than that of ordinary glass, so the cracks are also larger, which are unit cracking rather than ordinary glass cracking.
4.Different cold and hot shock resistance
High borosilicate glass uses borosilicate material, which replaces a large number of harmful heavy metal ions in raw glass, and improves the performance of cold and hot impact resistance of glass. Even if the temperature changes sharply at high and low levels, the glass will not crack. If hot water is added to the ordinary glass placed outdoors in winter, it will expand and crack by heat. A borosilicate glass will not burst when 100 hot water is added, even if placed at -30.
Post time: 3月-23-2021
