In-depth analysis of the application value of nanodiamonds

The manufacture of nanodiamonds, especially its application, has been a hot research topic for scientists from various countries in recent years.

Nano-diamond has been developed more than 30 years ago, but its application was limited to the field of polycrystalline, polishing agent and other abrasives. With the deepening of people’s understanding of the properties of nano-diamond, nano-diamond has been used in lubricants. , Metal coating, magnetic recording system, medicine and other fields have begun to be applied, and the application field is still expanding.

Overview of Nano Diamond Powder

Nano-diamond powder is used to synthesize high-energy explosives by detonation under negative oxygen conditions. The ultra-high pressure and high temperature conditions required for diamond synthesis are generated at the moment of detonation. At the same time, the atoms produced by free carbon explosives are released to form nano-scale diamond particles. Nano-diamond is different from the usual static pressure synthetic diamond, it has no edges and corners, it is spherical, and the single crystal grain size is only a few nanometers.

Nano-diamond powder is gray spherical high surface area carbon. The typical surface area of nano carbon particles is 10 – 45 nanometers (nm), the specific surface area (SSA) is in the range of 30 – 50 m 2 / g, the average particle size is in the range of 75 – 100 nm, and the specific surface area is about 2-10 m 2 /g. Nanodiamonds or diamond nanoparticles are diamonds with a size less than 1 micron. They may be produced by impact events such as explosions or meteorite strikes. Due to its low price, large-scale synthesis, surface functionalization potential, and high biocompatibility, nanodiamonds have been widely applied and studied as potential materials in biological and electronic applications and quantum engineering.

Nano-diamond powder can be made by multi-cathode DC plasma chemical vapor deposition and high pressure high temperature (HPHT). The potential use of nanodiamonds in biosensor applications. The surface modification of nanodiamonds can enhance its connection mechanism with specific biomolecules.

The application of nano-diamond powder in traditional fields

According to the information published by Russian nanodiamond expert Valery Yuriyevich Dormatov, a brief introduction to the application of nanodiamonds is given:

Adding nano-diamond to the lubricating oil can increase the working life of the engine and transmission, save fuel oil, reduce the friction torque by 20-40%, and reduce the friction surface wear by 30-40%.

1. Nano-diamond and metal composite coating

The service life of the parts after plating is increased by 1 to 9 times. The thickness of the coating can be reduced by 1 to 2 times. Standard electroplating equipment is used for electroplating.

The average diamond content in the metal coating is 0.3 to 0.5% by weight. When the thickness of the coating is 1 micron, the diamond consumption is 0.2 g (1 carat)/m2.

2. Nano diamond polishing liquid

Nano-diamond polishing liquid is widely used in semiconductor silicon wafer polishing, computer hard disk substrate, computer head polishing, precision ceramics, artificial crystal, cemented carbide, gem polishing and other fields due to its excellent performance. Russia uses nano-diamonds to polish quartz, optical glass, etc., with a polished surface roughness of 1nm. The application of nanodiamonds shows many advantages. Due to the ultra-fine and ultra-hard, the problems in optical polishing are easily solved. Fine polishing is a difficult problem in optical polishing. The original process method is to use abrasives repeatedly, which requires tens of hours and is very inefficient. The use of nano-diamonds greatly increases the polishing speed. The time required to polish the same workpiece is only ten hours to ten minutes, and the efficiency is increased by tens to hundreds of times. The following are some of the many application examples of nanodiamonds. It is not difficult to conclude from these cases that nano-diamond can adapt to and meet the needs of the development of super finishing.

Application of Nano-diamond Powder in Emerging Development Fields

1. Nano diamond is added to lubricating oil and cooling liquid

The application of nano-diamond in lubricating oil, grease and coolant is mainly used in machinery industry, metal processing, engine manufacturing, shipbuilding, aviation, transportation. Adding nano-diamond to lubricating oil can increase the working life of engines and transmissions and save fuel. Engine oil, the friction torque is reduced by 20-40percent and the friction surface wear is reduced by 30-40percent. 1000 kg of engine oil consumes 0.1-0.2 kg of nano-diamond. The application of nano-diamond in lubricating oil must solve the problem of stable suspension, which has been solved by companies. This problem is solved.

2. Nano-diamond-polymer composite

Nano-diamond polymer composites are used in aviation, automobiles, tractors, shipbuilding, medicine, chemical, petrochemical, globe valves, protective layers and wear-resistant coatings. Fluoroelastic rubber and polysiloxane-based high-efficiency coatings have been developed Layer. The elastic strength properties of polyisoprene rubber, styrene butadiene rubber, nitrile rubber and natural rubber have been greatly improved. Adding nano-diamond to rubber can reduce wear by an average of 2 to 4 times, increase fracture resistance by 30percent, and improve Destruction temperature 15percent.

Epoxy resin glue containing nano-diamonds has higher adhesion and cohesion. Adding nano-diamonds to the polymer can improve its strength, wear resistance and thermal aging resistance. 1000 kg of rubber (polymer) consumes nanometers Diamond 1～5kg, 1000m2 polymer coating consumes 1～5kg diamond.

3. Sintered body

In the field of abrasives, nano-diamonds are mainly used to mix with transition metals to produce high-strength and low-porosity diamond sintered bodies. Its micro-hardness can reach 6000～7000kg/mm2. It can be used to process soft or brittle materials with very high surface roughness. Low. If carbon is pre-epitaxially grown or diamond micropowder synthesized by static pressure is added, the microhardness of the diamond polycrystal obtained by sintering under the pressure of 10～12GPa can reach the level of natural diamond single crystal. It can be made into a drill bit to drill high-strength rock formations. Exceeding the performance of CB-СП (Russia) polycrystalline. When compressing the diamond powder synthesized by static pressure, using nano-diamond as the component of the silicon impregnating material can almost double the yield of the sintered body, and the compressive strength is 1.7GPa Increased to 2.2GPa. This sintered body is used as a cutting element for drills.

4. Magnetic recording system

Nano-diamonds can also be used in magnetic recording media such as magnetic tapes and magnetic disks, acting as wear-resistant additives and physical modifiers. Nano-diamonds are added when electrochemically coating composite magnetic recording films to improve the performance of magnetic recording devices. Adding nano-diamonds Diamond can reduce ferromagnetic material particles, increase recording density, and reduce abrasive wear and friction coefficient.

5. Add to intermetallic compound

Copper, tin, and zinc intermetallic compounds containing nanodiamonds can be used as friction parts with very harsh working conditions. At this time, plastic and liquid lubricating materials are often extruded. Nanodiamonds are ideal component materials for copper-zinc or copper-tin alloys ( The content does not exceed 15percent by volume). After adding nano-diamond, the friction is reduced to 1/2～1/6.

6. Medicine

Nanodiamonds can also be used in medicine to treat tumors, gastrointestinal diseases, and skin diseases. It is non-toxic, non-carcinogenic or rusty. Nanodiamonds are super active adsorbents and bioactive substances locating agents, which can greatly enhance drugs Efficacy.

Nano diamond powder price

The price of nano-diamond powder will vary randomly with factors such as production cost, transportation cost, international situation, and market supply and demand of nano-diamond powder. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for nano-diamond powder, please feel free to send an inquiry to get the latest price of nano-diamond powder.

Supplier of Nano Diamond Powder

As a global nano-diamond powder supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.