Quartz glass sheets JGS1 JGS2 JGS3

Short Description:

Quartz glass sheets, also known as fused silica plates or quartz plates, are highly specialized materials made from high-purity silicon dioxide (SiO₂). These transparent and durable sheets are valued for their exceptional optical clarity, thermal resistance, and chemical stability. Due to their superior properties, quartz glass sheets are widely used across multiple industries, including semiconductors, optics, photonics, solar energy, metallurgy, and advanced laboratory applications.

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Features

Detailed Diagram

Overview of Quartz Glass

Our quartz glass sheets are manufactured using top-grade raw materials such as natural crystal or synthetic silica, processed through precision melting and polishing techniques. The result is an ultra-flat, low-impurity, and bubble-free surface that meets the most stringent requirements of modern industrial processes.

Key Features of Quartz Glass Sheets

Extreme Thermal Resistance
Quartz glass sheets can withstand temperatures up to 1100°C in continuous use and even higher in short bursts. Their extremely low coefficient of thermal expansion (~5.5 × 10⁻⁷ /°C) ensures outstanding thermal shock resistance.
High Optical Transparency
They offer excellent transparency in the UV, visible, and IR spectrum depending on the grade, with transmission rates exceeding 90% in most visible ranges. This makes them ideal for photolithography and laser applications.
Chemical Durability
Quartz glass is inert to most acids, bases, and corrosive gases. This resistance is crucial for cleanroom environments and high-purity chemical processing.
Mechanical Strength and Hardness
With a Mohs hardness of 6.5–7, quartz glass sheets offer good scratch resistance and structural integrity, even under demanding conditions.
Electrical Insulation
Quartz is an excellent electrical insulator and is widely used in high-frequency and high-voltage applications due to its low dielectric constant and high resistivity.

JGS Grade Classification

Jgs1 Jgs2 Jgs3 Round Quartz Glass Plate Photoelectron Fused Silica Plate

Quartz glass is often categorized by JGS1, JGS2, and JGS3 grades, commonly used in domestic and export markets:

JGS1 – UV Optical Grade Fused Silica

High UV transmittance (down to 185 nm)
Synthetic material, low impurity
Used in deep UV applications, UV lasers, and precision optics

JGS2 – Infrared and Visible Grade Quartz

Good IR and visible transmission, poor UV transmission below 260 nm
Lower cost than JGS1
Ideal for IR windows, viewing ports, and non-UV optical devices

JGS3 – General Industrial Quartz Glass

Includes both fused quartz and basic fused silica
Used in general high-temperature or chemical applications
Cost-effective option for non-optical needs

Mechanical Properties of Quartz Glass

Property	Value / Range
Purity (%)	≥99.9
OH (ppm)	200
Density (g/cm³)	2.2
Vickers Hardness (MPa)	7600~8900
Young's Modulus (GPa)	74
Rigidity Modulus (GPa)	31
Poisson's Ratio	0.17
Flexural Strength (MPa)	50
Compressive Strength (MPa)	1130
Tensile Strength (MPa)	49
Torsional Strength (MPa)	29

Quartz vs. Other Transparent Materials

Property	Quartz Glass	Borosilicate Glass	Sapphire	Standard Glass
Max Operating Temp	~1100°C	~500°C	~2000°C	~200°C
UV Transmission	Excellent (JGS1)	Poor	Good	Very poor
Chemical Resistance	Excellent	Moderate	Excellent	Poor
Purity	Extremely high	Low to moderate	High	Low
Thermal Expansion	Very low	Moderate	Low	High
Cost	Moderate to high	Low	High	Very low

FAQ of Quartz Glasses

Q1: What is the difference between fused quartz and fused silica?
A: Fused quartz is produced from natural quartz crystal melted at high temperature, while fused silica is synthesized from high-purity silicon compounds through chemical vapor deposition or hydrolysis. Fused silica typically has higher purity, better UV transmission, and lower impurity content than fused quartz.

Q2: Can quartz glass sheets withstand high temperatures?
A: Yes. Quartz glass sheets have excellent thermal stability and can operate continuously at temperatures up to 1100°C, with short-term resistance up to 1300°C. They also have extremely low thermal expansion, making them highly resistant to thermal shock.

Q3: Are quartz glass sheets resistant to chemicals?
A: Quartz is highly resistant to most acids, including hydrochloric, nitric, and sulfuric acids, as well as organic solvents. However, it can be attacked by hydrofluoric acid and strong alkaline solutions like sodium hydroxide.

Q4: Can I cut or drill quartz glass sheets myself?
A: We do not recommend DIY machining. Quartz is brittle and hard, requiring diamond tools and professional CNC or laser equipment for cutting or drilling. Improper handling may cause cracking or surface defects.