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Cameo Glass
Cameo Glass

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Heat-Resistant Glass: All You Need To Know



Posted on: December 3, 2019

Heat-resistant glass is used by people all over the world for a wide range of tasks, including cooking, laboratory work, and even rocket construction. Here, Cameo Glass’ latest blog examines the core properties of heat-resistant glass, before explaining its main benefits and providing a sneak peak at the production process.

What is heat-resistant glass?

The answer to this is quite self-explanatory; heat-resistant glass can withstand high levels of heat without cracking or shattering.

Many of you may already be familiar with this type of glass through one room in particular – your kitchen. You may have heat-resistant glass in your cupboards in the form of Pyrex dishes, which are suitable for oven cooking, and the glass in your oven door or on the surface of your hobs. You can buy this heat-resistant glass in differing strengths, with the strongest variant perfectly equipped to prevent the spread of fires.

How is it made, and what are its uses?

Heat-resistant glass’ strength against heat depends on its chemical composition. Borosilicate glass is the least heat resistant; the difference between this glass and normal glass is the addition of boron oxide, which helps bind together the components that provide its heat-resistant properties. This glass is commonly used for cookware and even in laboratories.

The second most heat-resistant glass is Aluminosilicate, which contains aluminium oxide and can withstand temperatures of 800° celsius as a result. It is also scratch resistant, making the glass a common feature for touch displays on devices such as smartphones. The most heat resistant type of glass is high silica glass, which can withstand temperatures of around 1000° celsius and is mainly only used in industrial settings – taking this a step further still, the next next level above high-silica glass is fused quartz, which is used for aerospace applications.

Image of a thermometer, used here to represent heat

The process

  • Fabrication: Firstly, the ingredients that make up the glass are melted down together to form a liquid compound. Then, it is poured into a molten and left to cool down.
  • Cutting: The glass is then cut down into the necessary shapes. This part is usually done with a Computer Numerical Control machine, before polishing and other finishing services.
  • Tempering: This step is all about applying the heat treatment to the glass, which is done by passing the glass through a tempering oven before cooling, reinforcing the glass.
  • Laminating: This helps to make the glass more safety ready. It involves strengthening the glass with a plastic material interlayer, which is bonded by layers of adhesive.

Find out more

To find out more about our products, contact the Cameo Glass team. You can call us on 01793 513864 or fill out one of our online contact forms. We look forward to hearing from you!