Fused silica is a type of glass made from pure silica (silicon dioxide) that is melted and then cooled without crystallization. This process results in a transparent, high-purity material that is highly resistant to thermal shock and chemical corrosion. Fused silica is commonly used in applications such as optics, semiconductor manufacturing, and laboratory equipment due to its excellent optical clarity and stability. One of the key properties of fused silica is its low thermal expansion coefficient, which means it does not expand or contract significantly with temperature changes. This makes it ideal for high-temperature applications, such as in furnaces and optical fibers. Additionally, fused silica can withstand extreme temperatures, making it a preferred choice in various industrial and scientific fields.