Model: Sapphire Sight Glass.
Overview
Sapphire Glass — High-Strength Sapphire Windows & Viewports is a sight / viewing glass made from Boroslicate 3.3 Glass. Listed geometry: flat strip shape. Temperature 2050°C. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Boroslicate 3.3 Glass |
|---|---|
| Shape | Flat Strip |
| Model NO. | Sapphire Sight Glass |
| Head Code | Round |
| Connection | Other |
| Melting Temperature | 2050°C |
| Density | 3.99g/cm3 |
| Hardness | 9 Moh's Scale |
| Compressive Strength | 2.1gpa |
| Dieleetrie Constant | 7.5-10 |
| Crystal System | Trigonal |
| Chemical Formula | Al2O3 |
| Class | Hexagonal-Scalenohedral |
| Maximum specifications available | diameter 400mm. |
| Parallel to C-axis | 6.7×10-6 |
| Perpendicular to C-axis | 5.0X 10-6 |
| Supplier | Lumistar Special Glass Technology Co., Ltd. |
Technical data
| Ultra-high pressure sapphire glass | ||
| General performance | Chemical Formula | Al2O3 |
| Crystal System | Trigonal | |
| Class | Hexagonal-scalenohedral | |
| Melting Temperature | 2050°C | |
| Thermal performance | Thermal Expansion | Parallel to C-axis: 6.7×10-6 |
| Perpendicular to C-axis:5.0X 10-6 | ||
| Specific Heat | 0.18 Cal/gmoK(25°C) | |
| Mechanical properties | Density | 3.99-4.10g/cm3 |
| Hardness | 9 Moh's Scale | |
| (Hv)≥1700kg/mm2 | ||
| Modulus Of Elasticity | 340-380Gpa | |
| Compressive Strength | 2.1Gpa | |
| Tensile Strength | 0.19Gpa | |
| Optical performance | Index of Refraction | Parallel to C-axis: 1.769 |
| Perpendicular to C-axis:1.76 | ||
| Index of IR Transmission | 3-5.5um≥90%(coated with anti-reflective film) | |
| Electrical performance | ElectricalResistance | 1011/cm |
| 106/cm | ||
| 103/cm | ||
| Dieleetrie Constant | 7.5-10 | |
| Chemical performance | Corrosion Resistance | Can not be corroded by acid or alkaliat normal temperature, only can becorroded by HF at 300°C |
What to specify when you request a quote
- Glass type and thickness — listed as “Boroslicate 3.3 Glass”; name the glass and thickness.
- Temperature and pressure — listed as “2050°C”; give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — listed as “2.1gpa”; state tempering, lamination or the safety standard.
- Outline and edges — listed as “Flat Strip”; send a drawing with outline, holes and edge finish.
Engineering guides for this part
For material grades and coating options, see Optical Glass Material Options for Precision Filters and Windows. How parts like this are machined and finished is covered in AR Coating Process for Optical Glass Windows – Complete Manufacturing Overview. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is Infrared Windows.
