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CVD Diamond Crystal

POC-OC-122504-CVD Diamond Crystal

  • High optical transparency from ultraviolet to infrared regions.
  • Exceptional thermal conductivity for heat dissipation in high-power applications.
  • High mechanical hardness and durability for demanding environments.
  • Refractive index of 2.38 with low dispersion characteristics.
  • Capability for custom fabrication and enhanced transparency coatings.

Customizable Components Available for This Material to Meet Your Specific Needs!

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General Description

Chemical Vapor Deposition (CVD) Diamond Crystal is an advanced material with exceptional physical, thermal, and optical properties. Produced under controlled conditions, CVD Diamond Crystal  leverages sp² and sp³ hybridized bonds, resulting in unmatched mechanical strength and chemical stability. CVD diamonds can be synthesized as single crystals or polycrystalline layers, enabling diverse applications in optics, electronics, and laser systems.

Optical-grade polycrystalline CVD diamonds have low absorption rates in UV, visible, and IR wavelengths, making them excellent candidates for high-power laser optics. The material demonstrates superior thermal conductivity and hardness, extending its usability to extreme temperature ranges above 2000°C. POC offers high-quality single and polycrystalline diamonds tailored to meet specific optical and mechanical needs.

General Applications and Examples

  • High-Power Laser Systems: Suitable for windows, lenses, and optical components in high-power IR and UV laser systems.
  • Thermal Management Solutions: Acts as a heat spreader in high-power electronic circuits and laser diodes due to its exceptional thermal conductivity.
  • Protective Coatings: Provides mechanical durability for optics in harsh environments, including military-grade systems.
  • Spectroscopy and Infrared Applications: Transparent in the IR range, allowing its use in spectroscopic windows for research and industrial instruments.
  • Diamond-based Quantum Technology: Employed in applications requiring precise quantum properties, such as nitrogen-vacancy (NV) center-based sensors and quantum computing hardware.

Chemical and Structural Properties

Property Specification
Chemical Composition Carbon (C)
Crystal Structure Cubic
Density 3.5 g/cm³
Thermal Conductivity 2000 W/m·K
Refractive Index 2.38
Hardness (Mohs) 10
Operating Temperature Range -100°C to 2000°C
Fracture Toughness 3.5 MPa·m¹/²
Optical Transparency Range 225 nm to 25 µm
Enhanced Coating Transparency >99%

Optical Properties

Parameter Specification
Laser Damage Threshold >10 GW/cm²
Absorption Coefficient (10.6 µm) <0.1 cm⁻¹
Transparency UV to far IR (225 nm to 25 µm)
Birefringence None (Isotropic Material)
Refractive Index Stability Excellent (2.38 across spectrum)

Standard Fabrication Specifications

Specification Details
Dimensions Custom sizes up to 140 mm diameter
Thickness Tolerance ±0.1 mm
Surface Quality 10-5 S-D (Scratch-Dig)
Parallelism <1 arcminute
Chamfer <0.2 mm at 45°
Flatness <λ/10 @ 633 nm
Coating Options AR, DLC, and custom coatings

Spectrum Transmission Curve

CVD Diamond shows high transmission rates exceeding 90% across ultraviolet (225 nm), visible, and infrared wavelengths up to 25 µm. Custom coatings can enhance transmission to >99%.

Coating Specification

  • Anti-reflective (AR) coatings available for UV, visible, and IR ranges.
  • Enhanced coating improves transparency to >99%.
  • Coating durability tested under extreme environmental conditions.
  • Adhesion Test: Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test: In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test: Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test: Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing: Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test: After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.
Product Dimensions Coating Price (USD)
Optical-Grade Diamond 50 × 50 × 2 mm AR Coated (IR) 2,000
Thermal-Grade Diamond 100 × 100 × 5 mm None 3,500
Quantum-Grade Diamond 25 × 25 × 1 mm NV Center Enhanced 5,000
Custom Dimensions As requested AR/DLC/None

POC-OC-122504-CVD Diamond Crystal

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