ANTGLASS supplies and processes high-temperature glass and chemical-resistant glass for industrial equipment, laboratories, lighting, sensors, furnaces and analytical systems. We manufacture windows, sight glass, cover plates, tubes, discs, rings, cuvettes and custom-shaped components from borosilicate glass, fused silica, quartz glass and other technical materials.
A reliable component is selected from the full service condition—not from a temperature number alone. The material, thickness, edge finish, mounting method, pressure, heating rate, cooling rate, chemical concentration, exposure time and surface condition all influence performance.
Materials for Heat and Chemical Exposure
| Material | Technical strength | Typical ANTGLASS applications |
|---|---|---|
| SCHOTT BOROFLOAT 33 | Low thermal expansion, thermal-shock resistance and chemical durability | Equipment windows, sight glass, heater covers, sensor plates and laboratory parts |
| Corning PYREX SG3.3 | Borosilicate 3.3 performance for heat and chemical service | Industrial and laboratory windows, plates, tubes and custom components |
| Fused quartz glass | Very low thermal expansion, high-temperature capability and UV transmission | Furnace, semiconductor, laser, UV and analytical components |
| Fused silica | High purity, optical quality and low thermal expansion | Laser windows, optical cells, semiconductor parts and precision substrates |
Published SCHOTT data for BOROFLOAT 33 lists a coefficient of thermal expansion of 3.25 × 10−6/K between 20 °C and 300 °C, with published long-term and short-term maximum temperature references of 450 °C and 500 °C. These material values help select the glass family; the finished component is then designed for its actual thermal cycle and mounting condition.
Component Forms and Processing
ANTGLASS manufactures industrial sight and gauge glass, equipment viewing windows, precision glass tubes and cylindrical components, heater and lamp covers, quartz cuvettes, cover plates, discs, rings and custom furnace or laboratory parts.
Processing includes precision cutting, CNC contour machining, drilling, slotting, grinding, chamfering, edge polishing, surface grinding, lapping, polishing and ultrasonic cleaning. Edge condition and mounting features are designed to reduce stress concentrations during heating, cooling and assembly.
Design Inputs for Thermal and Chemical Service
- Continuous and peak operating temperature
- Heating and cooling rate, cycle frequency and thermal gradients
- Chemical type, concentration, temperature and exposure duration
- Pressure, vacuum, sealing and mechanical loading
- Window size, thickness, unsupported span and mounting method
- Required optical transmission, coating and cleanliness
- Inspection and replacement criteria for the installed component
Frequently Asked Questions
Is borosilicate glass heat resistant?
Yes. Borosilicate glass has a low coefficient of thermal expansion and strong resistance to thermal shock. It is widely used for industrial windows, sight glass, laboratory parts, lighting, heaters and equipment exposed to changing temperatures.
Why is borosilicate glass resistant to thermal shock?
Its low thermal expansion reduces the stress created when different areas of the part heat or cool at different rates. Geometry, thickness, edge condition, mounting and the actual temperature cycle still determine the final component performance.
Is soda-lime glass heat resistant?
Soda-lime glass tolerates normal service temperatures but expands more than borosilicate or fused silica and is less suitable for severe thermal shock. ANTGLASS uses soda-lime and B 270 glass where optical clarity and cost are more important than extreme thermal cycling.
When should fused silica or quartz glass be selected?
Fused silica and quartz glass are selected for lower thermal expansion, higher-temperature service, UV transmission, high purity and demanding laboratory, laser, semiconductor or furnace applications.
Does quartz glass react with aluminum oxide at high temperature?
Silica can react with alumina at sufficiently high temperature to form aluminosilicate phases. The actual result depends on temperature, time, purity, atmosphere and contact pressure, so furnace-contact interfaces should be isolated or validated for the intended process.