CVD diamond
Polycrystalline/Monocrystalline
Manufacturer introduction
Hebei Plasma Diamond Technology Co., Ltd. is a company that has been specializing in the development and production of high quality polycrystalline CVD diamonds for more than 20 years since the start of research and development in 1992.
Many of its products are produced by taking the full advantage of unique DC Arc Plasma jet CVD technology based on its experience and past records. The company offers a wide range of CVD diamonds that can be used for dressing tools, wire drawing die blanks, cutting tools, heat sinks, optical lenses, laser windows, and audio devices.
CVD diamond for thermal management
CVD diamond manufactured by Hebei Plasma Diamond is used as heat spreaders for high-power electronic and optoelectronic devices, such as high-power integrated circuits, microwave diodes and laser diodes are available.
■Performance and Features
・Standard sizes
Polished couples: Up to diameter 65mm
Raw thickness: Between 0.3mm and 1.5mm
Polished thickness: Between 0.2mm and 1.0mm
| Vickers Hardness | 8,000 – 10,000kg/m㎡ |
| Density | 3.51g/c㎡ |
| Young’s modulus | 1,000 – 1,100GPa |
| Thermal conductivity | 1,200W/m・K, 1,500W/m・K, 1,800W/m・K |
| Chemical stability | Insoluble in all of acid and alkali |
| Break strength | 500MPa |
| Thermal expansion coefficient | 1.0±0.1ppm/K（300K） 4.4±0.1ppm/K（100K） |
| Poisson ratio | 0.1 |
| Flatness | < 4μm/cm |
| Tolerance of thickness | ±50μm |
| Growth side surface finish | Ra < 100nm |
| Nucleation side surface finish | Ra < 30nm |
| Length × width | < 25mm, × 25mm |
| Standard thickness | 300μm |
CVD diamond for dressing tools
CVD diamond dresser blanks are supplied as rectangular logs. The dresseer tools using CVD diamond blanks are suitable for dressing alumina, carborundum and CBN grinding wheels.
■Performance and Features
・Standard Grades
Suitable for common diamond dresser tools
・High quality Grades
High wear resistance, to be the substitute of nature and HPHT synthetic single crystal diamond.
| Vickers Hardness | 8,000kg/m㎡ | 10,000kg/m㎡ |
| Density | 3.51g/c㎥ | 3.51g/c㎥ |
| Young’s modulus | 1,000GPa | 1,100GPa |
| Thermal conductivity | 1,000W/m・K | 1,500W/m・K |
| Chemical stability | Insoluble in all of acid and alkali | |
| Break strength | 350MPa | 550MPa |
| Thermal stability | 800℃ | 800℃ |
| Wear ratio | 200,000 | 400,000 |
CVD Diamond for cutting tools
CVD diamond cutting tools are widely used in non-ferrous materials, ceramics, abrasive composites, high-silicon-filled aluminum, graphite and other difficult machining materials.
■Performance and Features
・Very good wear resistance and low machining heat, thus extending tool life.
・Since it contains no binder, there is no concern about chemical reactions with the work material or cooling water during processing.
| Vickers Hardness | 8,000 – 10,000kg/m㎡ |
| Density | 3.51g/c㎥ |
| Young’s modulus | 1,000 – 1,100GPa |
| Thermal conductivity | > 1,000W/m・K |
| Chemical stability | Insoluble in all of acid and alkali |
| Break strength | ＞ 500MPa |
| Thermal stability | 800℃ |
| Wear ratio | ＞ 300,000 |
CVD diamond for optical windows
The broad-band transparency, high thermal conductivity and hardness make diamond an ideal choice for highly demanding window applications such as high power IR laser windows, high power microwave windows and durable windows for aggressive environments.
