Boron Carbide

Boron Carbide B4C Powder B4C Black Boron Carbide Wear Resistant Tool Boron Carbide Powder for Ceramic Reinforcement CAS 12069-32-8

B4C powder MF: B4C

B4C powder CAS No: 12069-32-8

B4C powder EINECS No: 235-111-5

B4C powder Appearance: Grey black powder

B4C powder Particle size: Can be customized according to your requirements.

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Properties of Boron Carbide

The boron carbide formula is B4C. The boron carbide structure is a hexagonal crystal. Boron carbide density is 2.52g/cm3. The boron carbide melting point is 2450 ℃

Boron carbide hardness: B4C material Mohs hardness scale is 9.3, and its microhardness is 5500~6700kg/mm2, second only to the hardest material diamond and cubic boron nitride.

Boron carbide has the characteristics of low density, high strength, high-temperature stability, and good chemical stability. Therefore, it is widely used in wear-resistant materials ceramic reinforcing phases, especially in lightweight boron carbide armor, reactor neutron absorbers, etc.

In addition, compared with diamond and cubic boron nitride, boron carbide ceramic is easy to manufacture and low cost, so it is more widely used. It can replace expensive diamonds in some places and is commonly used in grinding, grinding, drilling, and other aspects.

B4C powder possesses high purity, small particle size distribution, and high specific surface area; B4C powder is a synthetic ultra-rigid material, the hardness is 9.46; 56-6200Kg/mm2 microhardness, the proportion was 252 g/cm3, melting is 2,250 degrees Celsius.

Chemical properties: non-magnetic, resistant to high and low temperatures, strong acids and alkalis. In addition, boron carbide can effectively absorb neutrons without emitting gamma rays that are harmful to the human body, and it will not form secondary radiation pollution.

Boron carbide is one of the most stable substances to acid, and it is stable in all concentrated or diluted acid or alkali aqueous solutions. Boron carbide is stable below 800°C in an air environment. The boron oxide formed by oxidation at a higher temperature is lost in the gas phase, leading to its instability and oxidation to form carbon dioxide and boron trioxide.

The Production Process of Boron Carbide B4C Boride Powder?

In an electric furnace, Boron Carbide B4C Boride Powder is produced by reducing boron oxide with carbon at high temperatures. After grinding, the black powder is solidified by pressing at temperatures exceeding 2,000°C (3,630°F). Its melting point is approximately 2,350°C (4,260°F).

Specifications of Boron Carbide B4C powder


Purity APS SSA Color Morphology Zeta Potential Bulk Density
B4C powder >99% 50nm 42m2/g Black hexagonal -26mV

0.1g /cm3

Other size of Boron Carbide B4C powder: 500nm


Applicaiton of Boron Carbide B4C Powder

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 high melting points, hardness, elastic modulus, strong wear resistance, and good self-lubricating properties. It 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. It is internationally recognized and recommended as a nuclear reactor control 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 protecting 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 wear-resistant and corrosion-resistant 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. Its high chemical potential is widely used to produce 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, unshaped refractory material. It is widely used in various fields of metallurgy, such as steel stoves and kiln furniture.

Company Profile

My Carbides is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality carbides and relatives products.

The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.If you are looking for high-quality Carbides, please feel free to contact us or click on the needed products to send an inquiry.

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.

Payment Methods of Boron Carbide B4C Powder

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment of Boron Carbide B4C Powder

It could be shipped by sea, by air, or by reveal ASAP as soon as repayment receipt.

Package of Boron Carbide B4C Powder

Vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.


Q1: Is boron carbide powder harmful to human body?
Answer: Yes, boron carbide powder is highly irritating. If the skin is exposed to it for a long time or its dust is inhaled, it may cause skin itching, redness and swelling, and even cause damage to the lungs. Therefore, appropriate protective measures need to be taken when handling boron carbide powder.

Q2: What is the melting point of boron carbide powder?
Answer: The melting point of boron carbide powder is very high, about 2450°C.

Q3: What is the sintering temperature of boron carbide powder?
Answer: Since boron carbide is a typical covalent bond compound, its sintering temperature range is very narrow. Although the melting point is very high, when pure boron carbide powder is sintered at a high temperature close to the melting point, there is less material migration, so the sintering temperature is generally within a specific range well below the melting point.

Q4: What is the density of the sintered body of boron carbide powder?
Answer: The density of boron carbide powder after sintering can generally only reach about 80% of the theoretical density. This is because its covalent bond structure makes material migration difficult.

Q5: How to safely handle boron carbide powder?
Answer: When handling boron carbide powder, appropriate protective clothing and respirator should be worn to avoid prolonged exposure or inhalation of dust. Also, make sure your workplace is well ventilated and clean your work area regularly to prevent dust accumulation.

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