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What is Boron carbide

admin / 2023-09-07 / no Comments

Boron carburide is a high-performance carbon compound, which is composed mainly of boron, carbon, and other elements. The chemical formula for B4C is B4C. It is a carbon compound with excellent properties, mainly composed of boron and carbon elements, with the chemical formula B4C. This article will give a detailed description of the physical properties and chemical composition, as well as preparation methods, performance characteristics, and applications fields, for use in research and other fields.

Physical Properties

Boron carbide, a non-metallic inorganic material, has a mass density of 2.52g/cm3. It has a cubic lattice structure, a dense black crystal and a 0.243nm lattice constant. Boron carbide exhibits a low electrical conductivity of only 10-6S/m, and has excellent insulation. Its thermal conductivity (97W/m*K) is lower than metals, silicon and ceramics but higher than glass and other materials.

Chemical properties

Boron carbide exhibits chemical stability, and it is not reactive to acids and alkalis. B4C is reactive with O2, H2O and other substances. High temperatures can generate B2O3, CO etc. B4C has anti-oxidant and corrosion resistance. This makes it suitable for use over a long period of time in high-temperature, corrosive environments.

Preparation method

Preparation methods for boron carbide The main methods are the arc melting and chemical vapour deposit method.

Methode de réduction du carbothermal

Carbon thermal reduction (CTR) is widely used to prepare boron carbide . This method generates carbon dioxide and boron carburide by melting boric black and carbon. The reaction formula is B2O3+3C + B4C+CO. The reaction temperature ranges from 1500 to 1700°C. This method has the advantage of being simple, low-cost, and easy to use. However, the boron carbide produced is not of high purity.

Arc melting method

In the arc melting process, graphite electrodes are heated and melted in an arc with boric acid to create boron carbide. The reaction formula is B2O3+3C + B4C. Reaction temperature is usually 18002000 degrees. This method yields boron-carbide with high purity, fine particle size and a complex and expensive process.

Chemical vapour deposition method

Chemical vapour deposition uses the reaction of gaseous carbon black and borane at high temperature to create boron carburide. The reaction formula is B2H6+6C B4C+6H2. The reaction temperature ranges between 1000-1200°C. This method yields boron-carbide with a high degree of purity and superfine particles, but is costly and complicated.

Performance Characterization

Physical, chemical, mechanical, and other properties are primarily considered when describing the performance of boron carbide.

Physical property

Density, conductivity, thermal resistance, etc. are the main physical properties of Boron carbide. The density is 2.52g/cm3, conductivity 10-6S/m, and thermal conductivity 97W/m*K.

Chemical property

Boron carbide exhibits chemical stability, and it is not reactive to acids or alkalis. B4C is reactive with O2, H2O and other substances. High temperatures can generate B2O3, CO etc. B4C has anti-oxidant and corrosion resistance. This makes it suitable for use over a long period of time in environments with high temperatures and corrosive elements.

Mechanical property

Boron carbide's high hardness, melting temperature, and heat transfer make it a popular material in many industries. Hardness of 3500kg/mm2, melting point 2450, and heat transfer rate 135W/m*K are among the characteristics that make boron carbide so popular in industries, military, aerospace, and other fields.

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Boron Carbide and Silicon Can Make Body Armor More Impact

admin / 2023-09-01 / no Comments

Boron Carbide - What is it and what does it do?

Boron carburide also known by the name black diamond has a molecular formulation of B4C. It is usually a gray or black powder. It is one the hardest materials and is used as tank armor, in body shields, and for many other industrial purposes.

Upgrade to High-Grade Body Armor

In the past 12 year, researchers have looked for ways to reduce damage caused by bullets traveling at high speeds hitting armor made from boron carbide. Dr. Kelvin Yu Xie Assistant Professor of Materials Science and Engineering said: "Our research has now met this need. This is an important step toward designing advanced body armor to protect against powerful weapons in battle.

Boron carbide has been called a "black diamand" and is only second in hardness to cubic boron. The boron-carbide armor material is lighter and harder than silicon carbide and easier to mass-produce.

Boron Carbide Body Armor Lack

According to Texas A&M University's research, the main drawback of boron carbide is that it can easily be damaged by high-speed impacts. Xie, in a recent statement, said: "Boron carbide is excellent at stopping bullets traveling at 900 meters per seconds. It can therefore effectively block the majority of pistol bullets. If the speed is exceeded, then the trajectory of boron carbide will be affected. "Performance is less effective."

Scientists have discovered that high-speed vibrating boron carbide will lead to a phase transition, whereby the internal structure of boron carbonate will be altered and it will appear in more than one physical state at once. The bullet's impact transforms boron carbide from a systematically organized crystalline state into a disorderly-arranged glass state. This glassy state erodes the integrity of the contact between the bullets and the boron-carbide.

Boron Carbide Plus Silica: Benefits

Xie explained: "When boron carbide undergoes a state change, its glassy form creates a path that cracks can follow. Consequently, any damage caused locally by a bullet's impact will spread to the entire material. ."

Previous computer simulations suggested that adding small amounts other elements could make boron carbide less brittle. The researchers used a diamond tip to create controllable dents in a boron-carbide sample. This was done to simulate the initial impact from a high-speed gun. The researchers then observed the micro-damage caused by the impact using a high-power electronic microscope.

Xie, his colleagues and their research showed that the amount of phase changes was reduced by 30% even if there is a low silicon content. This reduces indentation damage by a significant margin. Xie says that while silicon may enhance the properties boron carbide, further experiments are necessary to find out if other elements also can improve its properties.

Tech Co., Ltd. () is an experienced boron-carbide powder manufacturer. We have over 12 years' experience in research and product development. You can send us an email if you want to buy high quality Boron carbide Powder.

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What is Boron Carbide Powder B4C?

admin / 2023-05-08 / no Comments

Boron Carbide Powder Boron caride powder It is shiny, hard, and black. Its hardness level is lower than the industrial diamond, but higher than silicon caride. Boron carbide is more fragile than most pottery. It has a strong chemical resistance and a large cross-section for thermal neutron capture. It is unaffected by hot hydrogen fluoride, nitric acid and other acids. It is soluble and insoluble when it comes into contact with molten alkali. The relative density (D204), ranges from 2.508 to 2.512. The melting point is 2350. The boiling point of water is 3500

Boron Carbide powder's physical and chemical properties
Boron carbide It does not react with acid or alkali solutions and has high potential chemically. It is capable of neutron absorption, wear resistance, and semiconductor conductivity. It is one of most stable compounds to acids. It is stable in all concentrated, dilute acid and alkaline water solutions. Boron carbide remains stable in the atmosphere at temperatures below 800F.
Some transition metals and their carbide coexist to create special stability. The metal borides are formed when the transition metals iv to v in the periodic table react strongly at 1000 1100 with boron carbide. It has been reported that boron carbide reacts with transition metal oxides at higher temperatures to form boron nutride and borides. These borides are mostly rare earth and alkaline-earth metal hexaborides.
It has a Mohs Hardness of approximately 9.5, making it the third hardest known substance after diamonds and cubic boron Nitride. Silicon carbide is harder than this.
Because of the way it is prepared, boron carbonide can easily be formed carbon defects. This results in a wide variety of boron/carbon ratio changes that do not affect the crystal structure. This can often lead to the loss of its physical and chemical characteristics. Such defects are hard to fix by powder diffraction and require energy loss spectrum and chemical titration.

Boron Carbide Powder Properties
Other names	Black diamond, boron carbide, powder and B4C
CAS No.	12069-32-8
Formula compound	B4C
Molecular Weight	55.26
Appearance	gray black powder
Melting Point	2763degC
Boiling Point	3500degC
Density	2.52g/cm3
Solubility of H2O	Insoluble
Exact Mass	N/A

Boron Carbide B4C Powder Cas 12069-32-8

Boron Carbide Powder
Boron carbonide is ideal for drilling, grinding, polishing hard materials such as ceramic wear parts like wear plate, pump and bearing parts, faucet, nozzle, valve, parts engineering ceramics, bio ceramics, nuclear reactor pellet, light body armor materials and applications. Specifically,
1. Useful for controlling nuclear fission. Boron carbide absorbs large amounts of neutrons in a non-radioactive manner, making it a great neutron absorber for nuclear power plants.
2. As abrasive materials. Boron carbide has been used for many years as a coarse abrasive. Boron carbide is hard to mold into artifacts due to its high melting point. However, if it is melted at high temperatures it can be made into simple shapes. This is useful for drilling and polishing hard material such as precious stone and hard alloy.
3. For coating coatings. Boron carbide is also a suitable ceramic coating for warships, and helicopters. It is light and resistant to armor-piercing bullets.
4. It is used to make the nozzle. It is used in the manufacture of gun nozzles. Boron carbide is very hard and wear-resistant. It does not react to acid or alkali. The boron nitride sandblasting tool nozzle is gradually replacing the carbide/tungsten steel, silicon carbide, alumina and zirconia sandblasting tools.
5. Others. Boron carbide is also used for the production of metal borides as well as the smelting and alloying of sodium boron and boron alloys and special welding.

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