What is the glass resistant?
Thermally resistant glass is a glass that is more resistant to thermal shock than conventional glass. It is therefore suitable for industrial, construction and cooking, where temperature changes would probably cause conventional glass. Thermal resistant glass is usually a borosilicate of glass, tempered glass or glass ceremony. The glass bakery is often referred to as Pyrex® to the general public, but it is correctly a trademark of Corning®, Inc., the main manufacturer of glass and ceramic products.
When most of the materials heat them, they expand; When they cool down, they close. This feature is known as thermal expansion and the number that indicates how much the material is expanded or of the deepens is called its thermal expansion coefficient . The glass has a high thermal expansion coefficient, which means that it expands very quickly when heated. This rapid expansion can cause glass breaking, which is known as thermal shock . FiberHe lasted thermal shock by changing its chemical composition, production method or both. This is known as SODA-LIME glass and is used for glass bottles and glasses, windows and other common applications. At the end of the 19th century, German chemist Otto Schott invented a borosilicate by adding the boron to the mix.
Borosilicate glass is lighter and stronger than soda glass, has a higher melting point and has a much lower thermal expansion coefficient. Used for laboratory devices resistant to heat, such as test tube; for baking and serving meals; And in industrial applications where high resistance to thermal shock, such as thermal insulation tiles, is required. It is also used as a high -quality optical glass - in large telescopes, for example - because it transmits light well and resists shape change.
Corning® has popularized the use of borosilicate glass in a baker under his Pyrex® brand, but most Pyrex® sold in connectedToday, the soda-limet glass is tempered. During production, it was heat treated with tempered glass, which caused the inner part of the glass to decrease and the surface tension increased, leading to better balance in the glass. Hard glass is stronger than without finished glass and better resistant to thermal shock.
Tempered Glass resistant to heat is used in dishes and glass fireplaces. The main disadvantage of using this type of glass is that its shape cannot be adjusted after cooling. Cutting or splitting of tempered glass does not balance its inner tension, so it breaks easily. When it breaks, it tends to penetrate small pieces than into large sharp fragments. For this reason, it is often used in automobile windows.
Glass ceramics is glass that has been treated thermally until crystals begin to form in the glass. By changing the amount of crystal, it is possible to create a heat resistant heat with a wide range of possible thermal expansion coefficients. Glass-ceramicsMostly uses for the peaks of glass joints and cooking surfaces, for the screens of the fireplace and for glass panels resistant to fire. In the construction there is a window or glass panel, which is described as "fire resistant", usually glass-limet glass, which was glazed with glass ceramics, or is constructed from two boards and filled with material for re-roof.