High Temperature Borosilicate Glass Sheet features a low thermal expansion coefficient and excellent resistance to rapid temperature changes, making it ideal for oven panels, industrial sight glasses, and high-temperature observation windows. Made from borosilicate 3.3 material, it supports customized sizes, thicknesses, shapes, and tempered processing for different applications.
High Temperature Borosilicate Glass Sheet is an engineered heat-resistant glass product made from borosilicate 3.3 material, developed for applications requiring stable performance under repeated heating and cooling conditions.
Compared with ordinary glass, borosilicate glass features a significantly lower thermal expansion coefficient, enabling excellent resistance to thermal shock and temperature variation. With a continuous working temperature of up to 550℃, it is widely used for oven panels, industrial sight glasses, laboratory equipment windows, and other high-temperature observation applications.
We manufacture customized borosilicate glass sheets with different dimensions, thicknesses, shapes, and processing requirements to meet specific industrial applications.
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Low Thermal Expansion for Thermal Stability
The unique borosilicate 3.3 composition provides a low thermal expansion coefficient of approximately 3.3×10⁻⁶/K, allowing the glass to maintain structural stability during rapid temperature changes.
This property makes it suitable for equipment exposed to repeated heating and cooling cycles.
Excellent Resistance to Thermal Shock
High Temperature Borosilicate Glass Sheet can withstand sudden temperature variations and has a thermal shock resistance of up to 280℃.
The material helps reduce the risk of cracking caused by uneven heating, making it reliable for high-temperature viewing windows and heating equipment.
Clear Optical Observation Performance
With light transmittance reaching 92%, the glass provides excellent visibility for monitoring internal conditions in industrial equipment.
It is especially suitable for sight glass applications where clear observation and heat resistance are required simultaneously.
Chemical Resistant Glass Material
Borosilicate 3.3 glass provides excellent resistance to acids, alkalis, and water.
The dense glass structure helps maintain surface quality and optical clarity during long-term operation in demanding environments.
| Property | Specification |
| Material | Borosilicate 3.3 Glass |
| Density | 2.23 ± 0.02 g/cm³ |
| Hardness | >7 Mohs |
| Tensile Strength | 4.8×10⁷ Pa |
| Thermal Expansion Coefficient | (0-300℃) 3.3±0.1×10⁻⁶/K |
| Thermal Conductivity | 1.2 W/(m·K) |
| Light Transmittance | ≥92% |
| Softening Point | 810±10℃ |
| Continuous Working Temperature | ≤550℃ |
| Thermal Shock Resistance | 280℃ |
| Surface Quality | 0/0, 40/20, 80/50 |
| Thickness Tolerance | ±0.02mm |
| Minimum Thickness | 0.5mm |
| Processing Options | Tempering, Coating, Precision Cutting |
Oven Panel and Heating Equipment Glass
High Temperature Borosilicate Glass Sheet is widely used in oven doors, heating equipment panels, and thermal appliances due to its excellent heat resistance and transparency.
It provides a reliable viewing solution while maintaining stability under repeated temperature changes.
Industrial Sight Glass Windows
The glass is suitable for observation windows in industrial equipment, tanks, reactors, and pipelines where operators need visual monitoring under high-temperature conditions.
Laboratory and Testing Equipment
Due to its chemical resistance and thermal stability, borosilicate glass is commonly used in laboratory instruments and testing equipment requiring accurate observation.
High Temperature Machinery Components
The glass can be customized for furnaces, heating systems, and other industrial devices requiring transparent heat-resistant components.
As an experienced High Temperature Borosilicate Glass Sheet manufacturer, we provide customized glass fabrication services for industrial customers worldwide.
Precision Size Processing
We support customized:
· Length and width
· Round discs
· Special shapes
· Thickness requirements
according to customer drawings or technical specifications.
Surface & Edge Processing
Available processing includes:
· Flat edge
· Polished edge
· Surface treatment
· Coating options
These processes improve installation compatibility and product appearance.
Tempering Service
Tempered borosilicate glass processing improves mechanical strength and impact resistance while maintaining the original thermal properties of borosilicate material.
OEM Manufacturing Support
We provide OEM manufacturing solutions for customers requiring customized glass components for equipment production and industrial projects.
High Temperature Borosilicate Glass Sheet uses borosilicate 3.3 glass as the base material.
Its composition mainly includes:
· Silicon dioxide (SiO₂)
· Boron oxide (B₂O₃)
· Other glass-forming oxides
The balanced composition provides:
· Low expansion characteristics
· High temperature stability
· Chemical durability
· Long service life
To protect glass products during transportation, we use professional export packaging solutions including:
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· Protective separation materials
· Shock-resistant packing
· Customized cartons
· Wooden cases for large-size glass
Packaging methods can be adjusted according to product size, quantity, and shipping requirements.
What makes borosilicate glass suitable for high-temperature applications?
Borosilicate glass has a low thermal expansion coefficient, which allows it to resist thermal stress caused by rapid temperature changes. This makes it suitable for ovens, sight glasses, and heating equipment.
What is the maximum working temperature of your borosilicate glass sheet?
Our borosilicate 3.3 glass sheet supports continuous working temperatures up to 550℃, with a softening point of approximately 810℃.
Can you produce customized borosilicate glass sheets?
Yes. We provide customized production based on customer requirements, including size, thickness, shape, coating, and tempering processing.
What is the difference between borosilicate glass and ordinary glass?
Borosilicate glass has lower thermal expansion, better thermal shock resistance, and higher temperature stability compared with ordinary glass.
Do you provide tempered borosilicate glass?
Yes. Tempered processing is available to improve mechanical strength and durability for demanding applications.
Professional Glass Manufacturing Capability
We specialize in customized glass production and provide reliable solutions for industrial glass applications.
Customized Engineering Support
From material selection to precision processing, we support customers with different project requirements.
Stable Product Quality
Strict manufacturing control ensures accurate dimensions, reliable performance, and consistent product quality.
Request Customized High Temperature Borosilicate Glass Sheet
Contact us for customized sizes, processing requirements, and professional borosilicate glass manufacturing solutions.
