Product type: Heat Resistant Glass. Application: Door, Building. Model: BLP-BG-001. Function: Optical Function, Thermal Function.
Overview
Borosilicate Glass Sheet, Flat Shape Pyrex Glass, Heat Resistant Sight Glass: a sight / viewing glass. Listed geometry: thickness 2-25mm, plate shape. Listed for Door and Building applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Type | Heat Resistant Glass |
|---|---|
| Shape | Plate |
| Thickness | 2-25mm |
| Usage | Door, Building |
| Structure | Solid |
| Model NO. | BLP-BG-001 |
| Moh's Hardness | 8 |
| Function | Optical Function, Thermal Function |
| Transparency | Transparent |
| Processing Method | Float Glass |
| Preparation Process | Float Glass |
| Color | Clear |
| Length | >1650mm |
| Width | 1650mm |
| Expansion Coefficient | 3.25 |
| Nd | 1.47379 |
| Supplier | Jiangmen Bolipai Glass Products Co., Ltd. |
Technical data
| Mechanical properties | |
|---|---|
| Density (g/cm3) (at 25°C) | 2.23±0.02 |
| Knoop hardness | 480 |
| Flexure strength | 24Mpa |
| Thermodynamic properties | |
| Coefficient of thermal expansion (α) (0-300°C) | 3.3±0.1×10-6 |
| Softening point (°C) | 830±10 |
| Strain point (°C) | 521±10 |
| Specific heat capacity | (2-100°C)0.83KJ×(kg×K)-1 |
| Thermal conductivity | 1.2W×(m×k)-1 |
| Thermal shock resistance(K) | 300 |
| Temperature performance(K) | 200 |
| Maximum working temperature | (>10h, 600°C), (>10h, 550°C) |
| Chemical properties | |
| Water resistence | ISO719/DIN12111, HGB1ISO720, HGA1 |
| Acid resistance | ISO1776/DIN12116, 1 |
| Alkali resistance | ISO695/DIN52322, A2 |
| Optical properties | |
| Refractive index | Nd: 1.47379 |
| Transmittance (5mm) | >92% |
| Electrical properties | |
| Specific resistance 1g | 250°C, 8.0Ω×cm |
| Dielectric loss | Tan , 38×(10)-4 |
| Dielectric Constant | 4.7 |
| Chemical component | |
| SiO2 | 79-82% |
| B2O3 | 8-14% |
| Na2O | 2-4% |
| Al2O3 | 1-6% |
What to specify when you request a quote
- Glass type and thickness — listed as “2-25mm”; name the glass and thickness.
- Temperature and pressure — give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — state tempering, lamination or the safety standard.
- Outline and edges — listed as “Plate”; send a drawing with outline, holes and edge finish.
Engineering guides for this part
For material grades and coating options, see Custom Borosilicate Glass Sheets Cut to Size: Precision and Performance. How parts like this are machined and finished is covered in How Borosilicate Glass Is Sandblasted for Matte Surface Processing. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Thermal Conductivity of Quartz Glass & Fused Quartz: A Process Guide. A related standard product is AR Anti-Reflection Optical Window.
