Fused quartz

Fused quartz is a very special kind of glass. It is made of almost pure silica, which is a substance made of silicon and oxygen.

Most common glass, like the soda-lime glass in your windows, has other ingredients added to it. These extra bits change how the glass looks or how it melts. Fused quartz is different because it stays very pure. This makes it much stronger and more resistant to chemicals than regular glass. It can also handle much higher temperatures before it melts.

Making this glass is a big job that requires intense heat. To create it, makers must fuse or melt high-purity silica sand. This melting happens at about 2200 degrees Celsius, which is 4000 degrees Fahrenheit.

One way to do this is by using an electrically heated furnace. Another way is to use a high-temperature flame. Some methods even use a special plasma flame to burn silicon compounds. This process turns the dust into a clear, pure glass. Depending on how it is made, the glass might have tiny amounts of other elements inside.

Scientists have used this material for many important discoveries. It is a key part of many tools used in space and in labs. For example, it was used to make a mirror for the McMath-Pierce solar telescope in 1962.

It is also used in the windows of the Space Shuttle and the International Space Station. These windows must be very strong to protect people in space. Some parts of the Hubble Space Telescope also use fused quartz.

Its ability to stay clear and strong makes it perfect for these hard jobs.

There are many interesting facts about how fused quartz behaves. It has a very low coefficient of thermal expansion. This means it does not grow or shrink much when the temperature changes. Because of this, it can go from hot to cold very fast without cracking. It is also very good at letting light pass through it. It can let ultraviolet light and infrared light pass through more easily than common glass.

Some types of this glass are even made to be better at letting one specific kind of light through. This helps scientists see things that are usually invisible.

You can find fused quartz working in many places around you. It is used to make the glass fibers that carry information in telecommunications. It is also used in some types of computer memory chips called EPROMs.

These chips use a small quartz window to let in ultraviolet light to erase data. You might even hear it used in music. Some modern glass instruments, like the glass harp, use it to make a clear sound. It is a material that helps us see the stars and connect our world through technology.