Firebricks Used In A Fireplace
You should only use a special type of brick, called firebrick, fire brick or a refractory brick, to make a fireplace. Normal bricks cannot stand up to the continued high heat inside a fireplace and will crack. In order to create firebricks, a special mixture called fire clay must be created from a mixture of silica, aluminum oxide and other materials that stand up well to high temperatures. The clay is then baked in a kiln until vitrified. The refractory properties of firebricks makes them very popular for a variety of applications. Not only are firebricks useful in fireplaces for people's home, but also for industrial furnaces, steel refineries and even as insulating tiles for the space shuttle.