There is a crystal in nature, It is as mysterious as the pyramids of the Pharaohs of Egypt, and as gorgeous as material from another world. Because of its beauty, those alchemists of 17th century believed that bismuth crystal was a symbol of mystery and energy. In their view, this beautiful material with colorful light and complex geometry structure contains some mysterious force, so they even included it in as one of the possible elements of the synthesis of the philosopher's stone. This, is the crystallization of bismuth.
Let’s learn about this substance, bismuth, which is a kind of metal shows color from silver to pink. It is brittle and easily crushed, and chemically stable. Bismuth occurs in nature as free metals and minerals. Bismuth was previously thought to be the most stable element with the greatest atomic mass, but in 2003 it was discovered to be extremely radioactive. Bismuth is an environmentally friendly brittle metal with high resistivity and strong diamagnetic properties. It is used in the fields of low-melting alloy raw materials, metallurgical additives, catalysts, medicine, semiconductor raw materials and high-temperature superconducting materials. The Nano bismuth powder has good lubrication characteristics and synergistic effect with the active element sulfur commonly used as lubricant additive, so it may be used as green lubricant additive instead of lead. At the same time, recent studies have shown that Nano bismuth powder has magneto resistive effect and hot spot effect, and may become a magnetic induction material and thermoelectric conversion material with production and development value, and has a wide range of application value.
At present, Nano bismuth is widely used in metallurgical lubricants.
As we all know, two solid surfaces in contact with each other in sliding, rolling or impact movement, will inevitably produce wear, resulting in surface damage or fall off, affecting its performance. It is estimated that about one-third to one-half of the world's current energy consumption is manifested in various forms of friction loss. In such an environment, the application of lubricants has been greatly promoted.
However, in recent years, Nano-lubricants have gradually entered people's vision and amazed many metallurgists. The ideal lubricant should have the following functions: first, osmotic and tribochemical effects. Dispersed nanoparticles in lubricating oil, due to its high surface energy, the friction has just started, the particles are adsorbed on the friction surface, forming a layer of physical adsorption, membrane element penetration of nanoparticles onto the surface of metal or on the friction surface produces chemical reaction, generate strong abrasion resistant chemical reaction film, the friction surface, reduce the friction and wear; Second, the ball function. The reason why Nano-lubricants have good lubrication effect is that nano-powder particles are spherical and they act as a kind of "ball bearing", thus improving the lubrication performance. At the same time, under heavy load and high temperature, the spherical particles between the friction surfaces are flattened, forming a sliding system and reducing friction and wear. Third, adsorption. The organic matter used to modify nanoparticles is easy to adsorb on the surface of friction metal, and a layer of organic composite film is formed to separate the metal surface, which plays a role of reducing friction and anti-wear. Fourthly, the function of repair. Nanometer metal powder can fill the micro pits and damaged parts of the working surface to repair.
The environmental friendly heavy metal element bismuth meets all the above requirements. It has synergistic effect with the active elements sulfur and phosphorus of common lubricating oil additives, and the single bismuth nanoparticle can obviously improve the anti-friction and anti-wear performance and bearing capacity of base oil by adding a small amount, so the Nano-bismuth powder is expected to be one of the components of green lubricating oil additives.
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years’ experience in providing super high quality chemicals and Nano materials. The Nano bismuth powder produced by our company has high purity, fine particle size and impurity content. Lower, please contact us if necessary.
