Differences between High Borosilicate Glass and Quartz Glass

Quartz Glass and High Borosilicate Glass: A Comparative Overview
Quartz Glass:
Quartz glass is a specialized glass composed solely of silicon dioxide (SiO2). It is a non-crystalline material with a microstructure consisting of Si-O tetrahedral structural units. The SiO2 content is greater than 99.5%, resulting in low thermal expansion, high temperature resistance, and excellent chemical stability. Quartz glass is commonly classified in China based on processes, applications, and appearance, including categories such as electrically fused transparent quartz glass, fused quartz glass, and optical quartz glass.
High Borosilicate Glass:
High borosilicate glass, also known as hard glass, is a unique glass material containing a significant amount of boron oxide. It exhibits low expansion, high temperature resistance, high strength, hardness, and excellent light transmittance. Due to its outstanding properties, high borosilicate glass finds widespread applications in industries such as solar energy, chemical, pharmaceutical packaging, and artistic decorations.

Quartz glass and high borosilicate glass are both specialized types of glass, each possessing unique properties and applications. Here is a comprehensive comparison highlighting their key characteristics:

Quartz Glass:
Composition: Consists solely of silicon dioxide (SiO2).
Microstructure: Comprises non-crystalline material with Si-O tetrahedral structural units.
Performance Features:
Unique microstructure contributes to outstanding properties.
Transparent quartz glass exhibits excellent transmittance in the UV to IR wavelength range.
Low thermal expansion, high-temperature resistance, and good chemical stability.

Classification:
Electrically fused transparent quartz glass;
Fused quartz glass;
Flame-fused transparent quartz glass;
Synthetic quartz glass;
Opaque quartz glass;
Optical quartz glass;
Semiconductor-grade quartz glass;
Quartz glass for electrical light sources;

Applications:
Semiconductor industry
Electrical light sources
Optical communication through light guides
Laser technology
Optical instruments

High Borosilicate Glass:
Alias: Hard glass.
Composition: Contains a significant amount of boron oxide, representing a special glass material.

Performance Features:
Low expansion rate
High temperature resistance
High strength
High hardness
High light transmittance
High chemical stability
Applications:

Solar energy applications：
Chemical industry
Pharmaceutical packaging
Electrical light sources
Artistic and decorative glassware

Electrical Conductivity:
Utilizes the glass's conductivity at high temperatures by inducing internal glass melting.
Laboratory Applications:

Widely used in laboratory equipment due to high fire resistance and physical strength, such as beakers and test tubes.
Key Differences:

Composition:
Quartz Glass: Primarily composed of silicon dioxide (SiO2).
High Borosilicate Glass: Contains boron oxide in addition to silicon dioxide.

Temperature Resistance:
Quartz Glass: Resistant to high temperatures, with a melting point around 1700 degrees Celsius.

High Borosilicate Glass: Exhibits high temperature resistance, with a softening temperature of 820 degrees Celsius.

Acid Resistance:
Quartz Glass: Resistant to acids, corrosion, and possesses good electrical insulation properties.

High Borosilicate Glass: Demonstrates high chemical stability.

In conclusion, while both quartz glass and high borosilicate glass excel in various applications, their differences in composition and temperature resistance make them suitable for distinct industrial and laboratory uses.