Fused silica bricks are a type of high-grade refractory material and special industrial product made from high-purity natural quartz (SiO?) as the main raw material,

melted in a high-temperature electric melting furnace (usually above 1800°C), and then shaped through a special process.

The advantages of fused silica bricks:

1.Extremely high thermal stability. 

This is the most crucial advantage. It can withstand drastic temperature changes without cracking (excellent thermal shock resistance). For example,

it can be directly immersed in cold water from a high temperature of 1000°C without damage. This is because of its extremely low coefficient of thermal expansion.

2. Good chemical stability

It exhibits extremely strong resistance to most acidic and neutral substances (except hydrofluoric acid and hot phosphoric acid), 

with an acid resistance of over 99%. Its alkali resistance is also superior to other siliceous materials.

3. Low coefficient of thermal expansion

Its temperature is approximately 0.54 × 10??/°C, which is one of the lowest among all refractory materials. 

This means that its dimensional changes are negligible during heating and cooling, thus ensuring excellent thermal and structural stability.

4.Good high-temperature strength.

 It can maintain high structural strength and load softening point even at high temperatures.

5.Excellent electrical insulation properties. 

Even at high temperatures, it has a high resistivity, making it an excellent high-temperature insulating material.

The application of fused silica bricks:

Fused silica bricks are widely used in high-tech and industrial fields where material performance requirements are extremely stringent.

1. Glass Industry (Core Application Area)

Key parts of a glass furnace:

Furnace Crown: It is used in high-quality glass melting furnaces because it does not deform at high temperatures 

and does not contaminate the molten glass.

Glass Furnace Throat: One of the most vulnerable parts of a glass kiln, fused silica bricks are the preferred material 

due to their excellent resistance to molten glass erosion.

Sidewall Brick: Used in areas that come into direct contact with molten glass to ensure the high purity of the glass products.

2. Metallurgical Industry

Non-ferrous metal smelting: Furnace linings used for smelting aluminum, copper, zinc and their alloys, 

especially in applications requiring high-purity metals, because fused silica bricks do not introduce impurities.

Continuous casting: Used as an intermediate ladle, pouring gate, or distributor to ensure the purity and smooth pouring of molten metal.

3. Chemical Industry

Acid-resistant equipment lining: Fused silica bricks can be used to manufacture the linings of reaction towers, storage tanks, 

and washing towers in strong acid environments such as sulfuric acid and nitric acid, resisting corrosion from acidic gases and liquids.

Coking industry: Used as lining for carbonization chamber furnace doors, etc.

4. Semiconductor and Photovoltaic Industries

5. Aerospace and military fields

6. Other high-tech fields

Fused fused bricks are a high-performance, high-purity special refractory material, an indispensable "cornerstone" material for modern high-temperature industries, 

especially high-end manufacturing industries such as glass, semiconductors, and aerospace.