Carbide powder

Boron Carbide B4C Powder Cas 12069-32-8

Item No.: Tr-B4C
Boron Carbide is one of the three hardest materials known, it is not affected by hot hydrogen fluoride and nitric acid.
Particle Size: -325mesh
Purity: 99%
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Description
Boron Carbide Properties
About Boron Carbide B4C Powder:
Boron carbide (chemical formula B4C) is an extremely hard boron carbon ceramic and covalent material, usually gray-black micro powder, commonly used in tank armor, bulletproof vests, engine damage powder and many industrial applications. The Vickers hardness is greater than 30 GPa, which is one of the hardest materials known after cubic boron nitride and diamond. Boron carbide is the third hardest known substance, second only to diamond and cubic boron nitride, so it is called "black diamond".
Boron carbide is a strong material with extremely high hardness (approximately 9.5 to 9.75 on the Mohs hardness scale). It is used to absorb neutrons with a high cross-section (that is, a good shielding performance against neutrons), and is resistant to ionization. The stability of radiation and most chemicals. Its Vickers hardness (38 GPa), elastic modulus (460 GPa) and fracture toughness (3.5 MPa·m1 / 2) are close to the corresponding values of the diamond (1150 GPa and 5.3 MPa·m1 / 2).
Boron carbide is a semiconductor whose electronic properties are dominated by jump-type transmission. The energy bandgap depends on the composition and the degree of order. The bandgap is estimated to be 2.09 eV, with multiple intermediate bandgap states, which complicates the photoluminescence spectrum. The material is usually p-type.
Boron carbide was discovered in the 19th century as a by-product of metal boride research and was not scientifically studied until the 1930s.
Boron carbide can absorb a large number of neutrons without forming any radioisotopes, so it is an ideal neutron absorber in nuclear power plants, and the neutron absorber mainly controls the rate of nuclear fission. In addition, compared with diamond and cubic boron nitride, boron carbide is easy to manufacture and low in cost, so it is more widely used. It can replace expensive diamonds in some places and is commonly used in grinding, grinding, and drilling. Feel free to send an inquiry to get the latest price if you would like to buy Boron Carbide B4C Powder in bulk.

Technical parameter of Boron carbide B4C powder
Boron Carbide Nanoparticles (B4C)
Crystal phase: Hexagonal
APS: 45-55nm
SSA: 40-60m2/g
Zeta Potential: -26mV
Bulk density: 0.10g/cm3
Purity: >99%
Color: Black
Making Method: Plasma vapor-phase synthesis method

How is Boron Carbide B4C Powder produced?
Boron Carbide B4C Carbide powder is produced by reducing boron oxide with carbon at high temperatures in an electric furnace. The carbothermic reduction method usually uses boric acid or boric anhydride as the raw material and carbon as the reducing agent. The high-temperature reduction reaction is carried out in an electric arc furnace. At present, the carbothermic reduction method is the main method for industrial production of boron carbide, which has the advantages of simple reaction and low cost. In addition, there are self-propagating thermal reduction methods, mechanochemical methods, direct synthesis methods, and sol-gel methods for preparing boron carbide.
Boron carbide was first synthesized by Henri Moissan in 1899. Boron trioxide was reduced with carbon or magnesium in the presence of carbon in an electric arc furnace. In the case of carbon, the reaction occurs at a temperature higher than the melting point of B4C, accompanied by the release of large amounts of carbon monoxide:
2 B2O3 + 7 C→B4C + 6 CO
If magnesium is used, the reaction can be carried out in a graphite crucible, and the magnesium by-product can be removed by treatment with acid.

Specifications of Boron Carbide B4C powder:

B

C

O

N

Si

Fe

Ni

77.48%

21.52%

<0.1%

<0.08%

<0.1%

<0.1%

<0.01%

 

Application of Boron Carbide B4C Powder:
Boron carbide due to low density, large strength, high-temperature stability, and good chemical stability. In wear-resistant materials, ceramic reinforcement phase, especially in light decoration, reactor neutron absorbers, etc.
Fine and advanced abrasive materials
Because of the high grinding efficiency of boron carbide, it is mainly used as a grinding medium in the grinding process of materials, such as: grinding, grinding, drilling and polishing of hard materials such as gems, ceramics, knives, bearings, and cemented carbides.
Industrial ceramic materials
Products made of boron carbide powder: sandblasting nozzles, sealing rings, nozzles, bearings, plungers of mud pumps, pestles and rocket launchers, ceramic coatings for warships, helicopters, etc., as a new type of material. It has the characteristics of high melting point, high hardness, high elastic modulus, strong wear resistance, and good self-lubricating properties and is widely used in sandblasting machinery, electronics, information, aerospace, automobile and other industries.
Shielding and control materials for the nuclear industry
Boron carbide material has a large thermal neutron capture section, excellent neutron absorption and radiation resistance, and is internationally recognized and recommended as a nuclear reactor control material and shielding material.
Bulletproof armor
Due to its high strength and small specific gravity, it is especially suitable for use in lightweight bulletproof armor, such as the protection of aircraft, vehicles, ships and human bodies.
Improve the life of mechanical parts
Combine boron carbide powder with metal to produce metal-based alloy powder. After special surface treatment of this material, the original mechanical parts are more resistant to wear and corrosion resistance to acid and alkali.
Special absorber provides energy
Boron carbide, also known as "black gold", is used as a power source in powder form as a solid fuel for the rocket.
Chemical industry additives
Due to its stable chemical properties, boron carbide does not react with acid and alkali solutions and has a high chemical potential, so it is widely used in the production of other boron-containing materials, such as zirconium boride and titanium boride.
Advanced refractories
Because of its anti-oxidation and high-temperature resistance, boron carbide is used as a high-grade shaped and unshaped refractory material and is widely used in various fields of metallurgy, such as steel stoves and kiln furniture

Boron Carbide Nanoparticles (B4C),Boron Carbide Nanopowder (B4C)
Storage Condition of Boron Carbide B4C powder:
Damp reunion will affect B4C powder dispersion performance and using effects, therefore, boron carbide B4C powder should be sealed in vacuum packing and stored in cool and dry room, the boron carbide B4C powder can not be exposure to air. In addition, the boron carbide B4C powder should be avoided under stress.

Packing & Shipping of Boron Carbide B4C powder:
We have many different kinds of packing which depends on the boron carbide B4C powder quantity.
Boron carbide B4C powder packing:vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Boron carbide B4C powder shipping:could be shipped out by sea , by air, by express?as soon as possible once payment receipt.

Boron Carbide Properties

Other Names B4C, B4C powder, black diamond, boron carbide powder,
boron-carbon refractory ceramic
CAS No. 12069-32-8
Compound Formula B4C
Molecular Weight 55.26
Appearance Gray to Black Powder
Melting Point 2763 °C
Boiling Point 3500 °C
Density 2.52 g/cm3
Solubility in H2O Insoluble
Electrical Resistivity 0 to 11 10x Ω-m
Poisson's Ratio 0.17-0.18
Tensile Strength 350 MPa (Ultimate)
Thermal Conductivity 31 to 90 W/m-K
Thermal Expansion 4.5 to 5.6 µm/m-K
Vickers Hardness 26 Mpa
Young's Modulus 240 to 460 Gpa
Exact Mass 56.037222
   
   

Boron Carbide Health & Safety Information

Signal Word Warning
Hazard Statements H332
Hazard Codes Xi
Risk Codes 20
Safety Statements 22-39
RTECS Number N/A
Transport Information N/A
WGK Germany 3
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