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.
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.
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).
We can successfully lengthen the service life of your tools and machines, and apparently, reduce the operating cost with improved safety.
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
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
Ia | Ib | IIa | IIb | ZS-Tech’s Type IIa diamonds | |
---|---|---|---|---|---|
Nitrogen Content | > 0.1% | < 0.25% | < 0.001% | < 0.001% | < 0.001% (ppb level) |
Inclusions | N, etc | Fe, Ni and others included in HPHT diamonds | None | B and AI included | None |
Color | Colorless, yellow or brown hue | Colorless, yellow or brown hue available | Colorless, brown or pink hue available | Blue | Colorless, 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.
Property | Common Diamond | ZS | Si | 4H-SiC | GaN | SiC |
---|---|---|---|---|---|---|
Thermal Conductivity (W / (cm • K))* | 20 | 20 | 1.5 | 3.8 | 1.3 | 4.9 |
Band Gap (eV) | 5.47 | 5.47 | 1.12 | 3.26 | 3.44 | 3.26 |
Breakdown Field (MV / cm) | 5~10 | 10 | 0.23 | 3 | 5 | 2.8 |
Electron Mobility (cm² / (V • s)) | 4500 | 4500 | 1400 | 900 | 1500 | 1000 |
Hole Mobility (cm² / (V • s)) | 3800 | 3800 | / | 120 | < 10 | / |
Electron Saturation Velocity (cm / s) | (1.5~2.7) X 10⁷ | 2 X 10⁷ | 0.86 X 10⁷ | 3 X 10⁷ | 2.4 X 10⁷ | 2.2 X 10⁷** |
Hole Saturation Velocity (cm / s) | (0.85~1.2) X 10⁷ | 0.8 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.
Property | Common Diamond | ZS | ZnS | Ge | Si | GaAs | ZnSe |
---|---|---|---|---|---|---|---|
Band Gap/eV | 5.47 | 5.47 | 3.9 | 0.664 | 1.11 | 1.42 | 2.7 |
Cutoff Wavelength/µm | 0.225 | 0.225 | 14 | 23 | / | / | 20 |
Absorption Coefficient | 0.1~0.3 | 0.1~0.3 | 0.2 | 0.02 | 0.35 | 0.01 | 0.005 |
Absorption Coefficient (10.6µm) | 0.1~0.6 | 0.1~0.6 | 0.2 | 0.02 | / | / | 0.0005 |
Microhardness/(kg/mm²) | >8000 | ~1000 | 230 | 780 | 1150 | 721 | 137 |
Refractive Index | 2.417 | 2.417 | 2.19 | 4 | 3.42 | 3.28 | 2.4 |
dn/dT(10-3/K) | 1 | 1 | 4.1 | 40 | 13 | 15 | 6.4 |
Thermal Conductivity/[W/(cm.K)] | 20 | 20 | 0.27 | 0.59 | 1.63 | 0.55 | 0.19 |
Coefficient of Thermal Expansion/10-6K-1 | 2.3 | 2.3 | 7.9 | 5.9 | 2.56 | 5.9 | 7.6 |
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.
Property | Common Diamond | ZS | SiCVD Diamond (Source Network) |
---|---|---|---|
Hardness (KG/mm²) | >8000 | ~10000 | >8000 |
Density (g/cm³) | 3.52 | 3.52 | 3.52 |
Young's Modulus (GPa) | >1200 | 1050 | >1000 |
Fracture Energy (J/M) | 10 | 10 | 25 |
Fracture Toughnes (Mpa • m½) | 3.4 | 3.8 | 1~8 |
Thermal Conductivity (W/cm • k) | 20 | 20 | 20 |
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.