Custom Square Optical Windows Green Moissanite SiC Crystal High Hardness
The green moissanite square window is a high-precision optical flat made from lab-grown silicon carbide (SiC) single crystal material. It is not intended for jewelry decoration but serves as a high-end functional optical component, acting as a viewing window, protective cover, or part of an optical system in harsh environments. Its distinctive green color is not for aesthetic purposes but reflects the material's excellent optical performance in specific wavelength bands.
ZMSH's Services:
We specialize in the R&D and precision processing of high-performance SiC crystal materials. In addition to providing the aforementioned green moissanite square windows for extreme environments, we also supply faceted gemstones for jewelry design and micro protective covers for the luxury watch industry. We offer comprehensive custom processing services based on design drawings or technical specifications, supporting the production of products in various shapes (square, circular, irregular), thicknesses, and surface finishes. Our goal is to be your all-in-one technical partner from material to finished product.
Green Moissanite Square Window Key Parameters
| Parameter Category | Parameter Name (English) | Description and Typical Values |
| Basic Dimensions | Dimensions | Customizable per client drawings; common range: 5mm × 5mm to 50mm × 50mm |
| Thickness | Customizable based on mechanical and optical requirements; typical range: 0.5mm–3mm |
| Optical Performance | Transmission Range | 0.4 μm – 5.5 μm (visible to mid-infrared) |
| Transmittance | >70% @ 4μm (after double-side polishing, 2mm thickness) |
| Surface Quality | Surface Quality | Customizable per application |
| Surface Flatness | Up to λ/ @ 632.8nm |
| Mechanical Properties | Hardness | Mohs Hardness: 9.25 |
| Young's Modulus | ~400–700 GPa |
| Thermal Properties | Coefficient of Thermal Expansion (CTE) | ~4.0–4.5 × 10⁻⁶ /K |
| Thermal Conductivity | ~80–150 W/m·K |
Green Moissanite Square Window Main Characteristics
The product's properties stem directly from the exceptional physical and chemical qualities of silicon carbide single crystal:
1. Extreme Hardness & Scratch Resistance:
- Green moissanite square window with a Mohs hardness of 9.25 (second only to diamond), the window surface is highly resistant to scratching. It maintains optical integrity over long periods in abrasive environments such as sand and dust, eliminating the need for frequent replacement.
2. Excellent Optical Performance:
- Broad-spectrum transmission: Green moissanite square window's good transmittance within the 0.4–5.5 μm range (covering visible to mid-infrared wavelengths), making it critical for multispectral sensing and infrared imaging systems.
- High refractive index (~2.65–2.69): Green moissanite square window is suitable for designing specialized optical systems.
3. Outstanding Chemical Stability & Corrosion Resistance:
- Nearly insoluble in acids or alkalis (except hydrofluoric acid and hot phosphoric acid) and resistant to seawater corrosion. Ideal for use as viewing windows in corrosive environments such as chemical processing, marine applications, and biomedicine.
4. Superior Thermal Stability:
- High thermal conductivity enables efficient heat dissipation.
- Low coefficient of thermal expansion ensures minimal dimensional change under high temperatures, preventing cracking or deformation. Suitable for high-power laser and engine applications.
5. High Rigidity & Bending Strength:
- High Young’s modulus indicates exceptional stiffness, with minimal deformation under pressure. Suitable for high-pressure differential environments (e.g., vacuum chamber viewports, deep-sea equipment).
Green Moissanite Square Window Application Fields
Thanks to its comprehensive performance, this square window is used in various high-tech and industrial fields:
① High-End Industrial Sensing & Inspection Equipment:
- Serves as a protective window for laser equipment, high-power infrared thermometers, and online spectral analyzers. Its hardness and infrared transmittance ensure signal transmission and protect internal sensors.
② Aerospace & Defense:
- Used in optical systems for missile seekers, UAV electro-optical pods, and submarine sighting devices. Its impact resistance, high-temperature tolerance, and sand erosion resistance outperform conventional optical glass.
③ Semiconductor Manufacturing & Vacuum Equipment:
- Functions as a viewport in semiconductor process chambers (e.g., MOCVD), withstanding high temperatures and corrosive atmospheres while allowing in-situ process monitoring via laser.
④ Special Harsh Environment Windows:
- Deep-Sea Exploration: Used as protective covers for underwater robot (ROV) cameras or sensors, capable of withstanding high pressure and seawater corrosion.
- Chemical & Energy Industries: Employed as sight glasses in reactors and petroleum exploration equipment, resistant to chemical corrosion and high pressure.
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1. Q: What are green moissanite square windows used for?
A: They serve as extremely durable optical windows and protective covers in harsh environments like high-pressure, high-temperature, or corrosive industrial and aerospace applications.
2. Q: How hard is a moissanite optical window?
A: With a Mohs hardness of 9.25, it is one of the hardest available optical materials, offering exceptional scratch and abrasion resistance.
Tags: #Square Optical Windows Green Moissanite, #Custom, #SiC Crystal, #High Hardness, #SiC, #SiC Wafer, #silicon carbide substrate
