Diamond has many excellent physical and chemical properties, high hardness, high thermal conductivity, high chemical stability, high optical transmission, wide band gap, negative electron affinity, high insulation and good bio-compatibility, etc. These unique physical and chemical properties combined to make the diamond available in many fields, which makes the diamond one of the most promising new functional materials in the last few decades. However, as the number and the high price of natural diamonds, limit its market applications to a large extent, so scientists find artificial methods of synthetic diamond, to ease a lot of industrial demand. Synthetic diamond has the same structure and comparable performance as natural diamond, while the cost is relatively low compared to natural diamond, and with a wide range of industrial applications and business prospects.

Synthetic methods of single crystal diamond are generally divided into two categories: High Temperature High Pressure (HTHP) and Chemical Vapor Deposition (CVD). The high quality single crystal diamond prepared by the CVD method can be completely colorless and transparent, with almost no impurities, and a variety of colored diamonds can be prepared if the dopant gas is selectively introduced during the growth process. As CVD diamond has so many advantages, it will become the mainstream of future material development, widely used in mechanical processing, communications, semiconductor, energy, defense, aerospace, military weapons and other cutting-edge areas of key parts.

Ultra precision machining

Originated in the last century 50's, diamond as cutting material has been successfully applied in the field of ultra-precision machining. Compared to Poly Crystal Diamond (PCD), Single Crystal Diamond (SCD) has no grain boundary inside, and the tool with SCD as the tip can reach the flatness and sharpness of the atomic level. Due to the SCD tool Of the ultra-smooth surface and no defective cutting edge, can be processed into a very high degree of finish mirror, currently any other materials can not be achieved. SCD tool has been widely applied in aerospace, precision instruments and other fields.

Optical applications

Diamond has the widest transmission spectrum in all current solid materials. From UV 225nm to infrared 25μm (except wavelength 1.8μm-2.5μm), and in the microwave range, the diamond has excellent permeability. Due to the excellent optical properties of diamond, and its high resistance to radiation damage, coupled with its high hardness, high thermal conductivity, high chemical stability and low expansion coefficient, diamond is the ideal material for making modern infrared optical window. At the same time MPCVD single crystal diamond can also be made of high power laser device power window, high temperature and heat shock resistance of diamond make the laser device output power be greatly improved.

Particle detector

Compared with traditional silicon-based detectors, diamond detectors have the advantages of high sensitivity, low dark current, strong anti-radiation ability and long service life. Diamond has a very wide band gap width (5.45eV), the C-C bond in the diamond lattice can be very high, the absorption of carbon atoms to high energy particles is very small. When the high-energy particles through the monocrystalline diamond, the ionization of particles in the diamond crystal formed within the electron-hole pairs, the electric field is applied to diamond, the electrons and holes were moving in the opposite direction, namely the formation of migration current. Migration current’s intensity is proportional to the intensity and quantity of the incident high energy particles, and the intensity of the incident particles is measured by detecting the magnitude of the migration current.

Due to the excellent properties of diamond particle detectors, it is particularly suitable for devices that require high-energy particles such as nuclear fusion reactors and nuclear fission reactors, space radiation detectors, etc.

Semiconductor and electronic devices

Single crystal diamond has high electron and hole mobility, high breakdown voltage, high thermal conductivity, can be semiconducted after doping, making it the most known wide band gap high temperature semiconductor materials. At present, MPCVD method has been prepared on the large-size single-crystal diamond to get up to 1150m2/V mobility. Once the diamond-based high-temperature semiconductor can be large-scale application, then the world's silicon-based semiconductor industry will face a huge change, diamond high-temperature semiconductor will lead the next semiconductor industry revolution.

Gemstone Diamond (Synthetic Diamond)

Natural diamond is extremely rare in nature, basically of non-renewable resources, and with its special nature and luster, since ancient time have been used as a senior ornament. Natural diamond is generally small and expensive, but MPCVD method can prepare large particles of gem-grade single crystal diamond, after polished and other processed, the products can be comparable to natural diamond, its luster and nature even better than natural diamond. The use of MPCVD method for the preparation of single crystal diamond in the process of incorporating other elements, also can produce a variety of colors of the diamond, its decorative effect is far from natural diamond can be comparable.

Luoyang Yuxin Diamond Co., Ltd’s CVD single crystal diamond is manufactured by Microwave Plasma Chemical Vapor Deposition. With good wear resistance, thermal conductivity and compressive resistance, high hardness and strength, low friction coefficient, excellent corrosion resistance and chemical stability, it can be sharpened into very sharp blade, and it is considered to be the most ideal ultra-precision cutting tool material, which occupies an important position and is widely used in the mechanical processing field especially the ultra precision processing field. 

Features: used in ultra precision cutting tools, especially processing non-ferrous metal materials, such as aluminum (alloy), copper, high polymer materials (MMCs), carbon fiber reinforced plastics (CFPs) Parts surface can be the mirror effect, and its surface roughness can reach below Ra-0.1μm.

With the improvement of CVD synthesis technology, through the adoption of gas raw material (hydrogen, methane), Luoyang Yuxin Diamond Co., Ltd get the completely transparent and colorless large size diamond single crystal under less than one air pressure, the temperature of 800-1200 ℃ by epitaxial growth way (growth way/as shown in Figure 1), its composition, hardness, density, etc. are basically identical with natural diamond, but the price is much lower than that of natural diamond; different from the method of high temperature and high pressure (HTHP), CVD artificial synthetic technique does not need to use the catalyst, and puts an end to forming metal inclusions, cracks, holes, etc. in the production.

Features: after polishing, the clarity is commonly VVS and above level, color chromaticity of D-J.

We can provide raw diamond at carat level.