Dr. Zhao first stirred it by hand, and then squeezed it with a three-roll honing machine for 30 min to test the grease. It is indicated that the nano-Bi powder is directly added, and when the amount is 2%, the grease has a low friction coefficient and a s

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1 Zero-dimensional cadmium sulfide（CdS） nanomaterials Zero-dimensional nanomaterials require that the particles constituting the material morphology are in nanometer size in all three dimensions, that is, the movement of particles in three dimensions is l

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ZrB2 is a high temperature resistant ceramic with a strong covalent bond and has a hexagonal crystal structure with a lattice constant of a=3.169A and b=3.533A. The melting point is as high as 3246oC, the theoretical density is 6.09g/cm3 (the measured

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Iron-nickel alloy is a low-frequency soft magnetic material with high magnetic permeability and low coercive force in a weak magnetic field. Early iron-nickel alloys were used for telephone communication, and a heat treatment process and vacuum smelting m

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Chromium alloys have high strength and corrosion resistance, and alloys composed of iron and nickel are commonly known as stainless steel.

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Magnesium nitride （ Mg3N2 ） is a pale yellow powder having a melting point of 800 C and a boiling point of 700 C (sublimation), belonging to a cubic crystal system. In 1997, Partin et al. used the time-of-flight powder neutron diffraction data to calculat

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Micro-nano-sized copper powder has a wide range of applications in many fields due to its large specific surface area, strong surface activity, high melting point, good magnetic properties, electrical and thermal conductivity, and good light absorption, s

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AlN ceramics have excellent properties such as high thermal conductivity, high strength, high electrical resistivity, low density, low dielectric constant, non-toxicity, and thermal expansion coefficient matched with Si. They will gradually replace tr

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The special crystal structure of boron carbide makes it have excellent mechanical properties and good chemical stability. Therefore, boron carbide can be applied to refractory materials, wear parts, bulletproof armor and aerospace.

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In recent years, with the development of integrated circuit manufacturing technology, the circuit feature size has been reduced to less than 2 m, the gate electrode and the interconnect line have also been sharply narrowed, the contact area has become sma

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