Product Application

Technology Products

Industries

ZS-Tech specializes in the production and sales of CVD lab-created SCDs, involving tool-grade diamonds and gem-grade diamonds. At present, our main products are Type IIa diamonds, which are rare jewelry-grade diamonds, and can serve as the superior material for optical windows. Our products can also be widely applied to automobiles, machinery, electronics, medicine, aerospace, optical instruments, and other scientific and technological fields.

Automobiles and Aerospace

Quality and Efficiency

New technologies and machining solutions are changing the way of vehicles and aircraft manufacturing. ZS-Tech can provide ultrahard materials that reform the machining ways of the automotive and aerospace industries. Our uniquely designed solutions and extensive know-how for applications will help handle your machining challenges.

Thermal Management

CVD synthetic diamonds achieve higher power density.

ZS-Tech’s CVD diamond radiators can offer higher levels of thermal performance, system performance, stability and equipment life than common ones. They can run at higher power levels without increasing the working junction temperature (Tj).

Anti-wear Parts

An anti-wear solution expert

We can successfully lengthen the service life of your tools and machines, and apparently, reduce the operating cost with improved safety.

Optics

Optical-quality CVD Monocrystal Diamonds

Optical-quality CVD monocrystal diamond is new functional material. Diamonds have a broad prospect of applications in optics because they have many excellent characteristics: high hardness (non-abrasive optical lens), high transmittance in a long-wavelength infrared light band (at room temperature), highest thermal conductivity at room temperature, superior chemical stability, and high resistance against thermal shock. The optical-quality CVD monocrystal diamonds can be widely used in aviation, military, scientific research equipment and other aspects, including CO2 laser windows (10.6 microns), high power microwave windows, among others. They function as advanced products with high added values.

ZS-Tech’s optical-quality CVD monocrystal diamonds can realize industrial production, with stable quality and various specifications available.

Square: Available side length of 3mm, 5mm, 10mm, 12mm (custom-made) and 15mm (custom-made); 0.3mm, 0.5mm, 1.0mm and 2.0mm thick.

0.3mm, 0.5mm, 1.0mm and 2.0mm thick.

Rectangle: Within 15mm in length and width;

0.3mm, 0.5mm, 1.0mm and 2.0mm thick

Product Specifications and Technical Parameters
Product Specs & Technical Parameters

Optics

Optical-quality CVD Monocrystal Diamonds

Optical-quality CVD monocrystal diamond is new functional material. Diamonds have a broad prospect of applications in optics because they have many excellent characteristics: high hardness (non-abrasive optical lens), high transmittance in a long-wavelength infrared light band (at room temperature), highest thermal conductivity at room temperature, superior chemical stability, and high resistance against thermal shock. The optical-quality CVD monocrystal diamonds can be widely used in aviation, military, scientific research equipment and other aspects, including CO2 laser windows (10.6 microns), high power microwave windows, among others. They function as advanced products with high added values.

ZS-Tech’s optical-quality CVD monocrystal diamonds can realize industrial production, with stable quality and various specifications available.

Square: Available side length of 3mm, 5mm, 10mm, 12mm (custom-made) and 15mm (custom-made); 0.3mm, 0.5mm, 1.0mm and 2.0mm thick.

0.3mm, 0.5mm, 1.0mm and 2.0mm thick.

Rectangle: Within 15mm in length and width;

0.3mm, 0.5mm, 1.0mm and 2.0mm thick

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Types of diamonds: Type IIa diamonds remain our present main product. As a rare jewelry-grade diamond variety, it is also an ideal material for optical windows.

IaIbIIaIIbZS-Tech’s Type IIa diamonds
Nitrogen Content> 0.1%< 0.25%< 0.001%< 0.001%< 0.001% (ppb level)
InclusionsN, etcFe, Ni and others included in HPHT diamondsNoneB and AI includedNone
ColorColorless, yellow or brown hueColorless, yellow or brown hue availableColorless, brown or pink hue availableBlueColorless, brown hue available

Theoretically, the infrared transmittance of diamond is as high as 71 percent, while that of ZS-Tech’s diamonds is more than 69 percent.

Semiconductor property: Performance comparison between diamonds and other common semiconductor materials

PropertyCommon DiamondZSSi4H-SiCGaNSiC
Thermal Conductivity (W / (cm • K))*20201.53.81.34.9
Band Gap (eV)5.475.471.123.263.443.26
Breakdown Field (MV / cm)5~10100.23352.8
Electron Mobility (cm² / (V • s))45004500140090015001000
Hole Mobility (cm² / (V • s))38003800/120< 10/
Electron Saturation Velocity (cm / s)(1.5~2.7) X 10⁷2 X 10⁷0.86 X 10⁷3 X 10⁷2.4 X 10⁷2.2 X 10⁷**
Hole Saturation Velocity (cm / s)(0.85~1.2) X 10⁷0.8 X 10⁷///**

*: at room temperature
**: similar to diamond

Thanks to the super high charge transfer rate, the maximal heat conductivity among the semiconductors, the diamond-based semiconductor devices can operate in harsh environments such as high frequency, high power, or high voltage. So, diamond is an advantageous semiconductor material.

Optical property: Performance comparison between diamonds and other common infrared materials

PropertyCommon DiamondZSZnSGeSiGaAsZnSe
Band Gap/eV5.475.473.90.6641.111.422.7
Cutoff Wavelength/µm0.2250.2251423//20
Absorption Coefficient0.1~0.30.1~0.30.20.020.350.010.005
Absorption Coefficient (10.6µm)0.1~0.60.1~0.60.20.02//0.0005
Microhardness/(kg/mm²)>8000~10002307801150721137
Refractive Index2.4172.4172.1943.423.282.4
dn/dT(10-3/K)114.14013156.4
Thermal Conductivity/[W/(cm.K)]20200.270.591.630.550.19
Coefficient of Thermal Expansion/10-6K-12.32.37.95.92.565.97.6

Theoretically, the infrared transmittance of the diamond is as high as 71 percent, while ZS-Tech’s diamonds have an infrared transmittance of over 69 percent.

As a wide-bandgap semiconductor (Egap= 5.47 eV), a diamond boasts good transmission from vacuum ultraviolet (227nm) to far-infrared and microwave (millimeter band), except the absorption peak at 3~5μm caused by phonon vibration. Its excellent thermal shock resistance is attributed to ultralow thermal expansion coefficient with chemical inertness and wear resistance, as well as high thermal conductivity. Thanks to its low absorption coefficient, high laser damage threshold and high thermal conductivity, the diamond’s thermal lens effect as the laser output window is 200 times lower than that of the ZnSe window. The low atomic number makes the diamond nearly transparent to X-ray. So, diamond is an ideal infrared optical window material.

Cutting tool property: Comparison of the main performances between natural diamonds and ZS-Tech’s lab-grown diamonds under a certain temperature

PropertyCommon DiamondZSSiCVD Diamond (Source Network)
Hardness (KG/mm²)>8000~10000>8000
Density (g/cm³)3.523.523.52
Young's Modulus (GPa)>12001050>1000
Fracture Energy (J/M)101025
Fracture Toughnes (Mpa • m½)3.43.81~8
Thermal Conductivity (W/cm • k)202020
Wear Ratio>0.4 Million>0.4 Million>0.3 Million

Post-treated surface roughness (RA) is less than 5 nanometers.

A CVD diamond cutting tool shares a similar performance with that of natural diamond. It can realize ultra-thin cutting, and process extremely high workpiece accuracy and ultralow surface roughness. Such a cutting tool is recognized as an ideal and irreplaceable ultra-precision machining tool. Different crystal facets have varied values of hardness, so the diamond products can be precisely oriented. The precise crystallographic orientation of ZS-Tech diamonds can be achieved.