High purity quartz is a kind of mineral product which is purified by crystal

Fused silica is a processed form of silica with an amorphous structure. Also known as synthetic fused silica, this material can be made in the following ways:
Using gas or electroheat to melt silica particles into a single form, or using chemicals to synthesize glass, both processes can create a sticky, cross-linked 3D structure with excellent optical properties, thermal shock resistance and a low coefficient of thermal expansion, meaning it does not significantly expand with increasing temperature.
characteristics of fused silica
Fused silica has a number of beneficial properties that make it an ideal material for the manufacture of glass for optical products, high-tech products and a variety of other applications. These include:

Chemical Properties Fused silica produces a chemically inert glass which is considered to have a high level of chemical purity. This means it can be exposed to several different types of chemicals used in commercial, industrial and laboratory settings without degradation or suffering damage. Although both potassium hydroxide and hydrofluoric acid can damage it, it is compatible with most other chemicals.

Electrical properties Fused silica glass is electrically insulating. Its resistance varies with temperature and ranges from 1018 Ω * cm (20°C) to 1010 Ω * cm (400°C). It also has good dielectric properties and high frequency properties, with low dielectric constant and low dielectric loss. Due to the large silicon-oxygen bond gap in the material structure, only the ionic impurities in the material can be charged and conductive, making it highly resistant.

Mechanical Properties One of the unique and advantageous properties of fused silica is its elasticity. Manufacturers can make flexible micromechanical parts that would otherwise face breakage or wear during movement. Although standard glass cannot be used to produce flexible microdevices because of the risk of cracks in the finishing stage, fused silica has higher elasticity and resistance to microcracks. Fused silica is also incredibly strong and resistant to compression. Stretching is more prone to damage than compression.

Optical properties Fused silica is a highly transparent material that can be used in applications ranging from ultraviolet to infrared light, covering the entire visible light spectrum and extending far beyond it. Manufacturers can also customize the transmission of parts by modifying the technology and purity levels used in the production process. Contaminants such as aluminum, iron, and sodium change light absorption.

Thermal performance Fused silica has a low and very consistent coefficient of thermal expansion, making it an excellent material choice for components that need to remain stable over a wide temperature range. This characteristic and its excellent dimensional stability enable it to withstand thermal shock and any related damage.
Application of Fused Silica

Due to the very superior properties of fused silica, it can be used in a variety of precision manufacturing for commercial, industrial and laboratory applications. Some of the most common applications include:

Chemical and medical precision glass fused silica parts can withstand exposure to chemicals and pharmaceutical formulations because they are chemically pure and resistant to chemical and thermal damage.
Electronic/electronic technology Fused silica can be used to manufacture insulating parts because they are non-conductive, provide high penetration field strength, and ensure low electrical losses.
High-temperature operation Because fused silica has a low coefficient of thermal expansion, it can be used to manufacture parts for high-temperature applications.
Light and Laser Technology Fused Silica parts can be used for laser separation of light.
Optical system component manufacturers can produce transmissive optical components, mirrors, metrology assemblies, and lenses for optical systems.
Semiconductors Fused silica is commonly used for semiconductor components due to its purity.
UV Hygiene Fused Silica is resistant to high temperature and radiation, UV quartz glass can be used to manufacture UV sanitary equipment. It also allows UVC light to pass through, thus aiding in disinfection.