Boron carbide is produced by high-temperature smelting of boric acid and carbon materials in an electric furnace. The theoretical density is 2.52g/cm3, the melting point is 2450°C, and the microhardness is 4950kgf/mm2. Its hardness is second only to diamond and cubic boron nitride. It has the characteristics of high temperature resistance, acid and alkali corrosion resistance, high strength, good chemical stability, and light specific gravity. It is widely used in many new material fields.
| English name | Boron carbide |
| alias | B4-C, B4C, Black Diamondstone, tetraboron carbide |
| CAS number | 12069-32-8 |
| chemical formula | B4C |
Chemical content
| B | 78-81 |
| C | 17-22 |
| Fe2O3 _ _ _ | 0.2-0.4 |
| B 4 _ | 97-99 |
The use of boron carbide
| 1 | Application of boron carbide in sapphire wafer (LED) From the perspective of materials and grinding, the materials for processing and grinding sapphire crystals are artificial diamond, boron carbide, and silicon dioxide. Due to the excessive hardness of artificial diamond (Mohs hardness 10), it will scratch the surface when grinding the sapphire wafer, which will affect the light transmittance of the wafer and is expensive. However, the hardness of silica is not enough (Mohs hardness 7), and the poor grinding force is time-consuming and labor-intensive in the grinding process. Therefore, boron carbide abrasive (Mohs hardness 9.3) becomes an ideal material for processing and grinding sapphire crystals. |
| 2 | for industrial use Make bulletproof materials, such as bulletproof shrapnel in bulletproof vests, ceramic bulletproof tiles in the cockpit of aircraft pilots, and ceramic bulletproof plates for modern armored personnel carriers and tanks. |
| 3 | Used in the nuclear industry Boron carbide is used to make control rods, regulating rods, accident rods, safety bars, shielding rods for nuclear reactors, boron carbide tiles for radiation protection, plates or neutron absorbers (made of powder with high B10 content), or mixed with cement to make nuclear reactor shields, which is an important functional element second only to nuclear fuel elements. |
| 4 | Used in the field of refractories Boron carbide as an antioxidant additive is used in low-carbon magnesia carbon bricks, castables. It is used in the steel industry for key parts with high temperature resistance and erosion resistance. |
| 5 | Used in other engineering ceramic materials Boron carbide makes nozzles for sandblasting machines, high-pressure water cutting machine nozzles, sealing rings, ceramic abrasives, etc |
| 6 | Used in general industrial fields Boron carbide is made into welding rods to enhance the strength of Han noodles; Used as grinding and polishing materials, abrasives for water cutting and emery abrasive correction materials; Polishing and grinding in the jewelry industry. |
| 7 | Electrical properties of boron carbide applications Boron carbide-graphite thermocouples consist of a graphite tube, a boron carbide rod, and a boron nitride bushing in between. In inert gases and vacuum, the use temperature is up to 2200℃.At 600~2200Between °C, the potential difference has a good linear relationship with temperature. |
| 8 | Application of boron carbide as a chemical raw material Boron carbide powder is activated by halogen and can be used as a boronizing agent for steel and other alloys to infiltrate boron on the surface of steel to form a thin layer of iron boride to enhance the strength and properties of the material. |
Particle size is routinely produced in the factory
| GB/T2481 | 60# 80# 100# 120# 150# 180# 240# 280# 320# 360# 400# 500# 600# 800# 1000#1200# 1500# W40 W28 W20 W14 W10 W7 W5 W3.5 W2.5 W1.5 W0.5 – 325 mesh, 60-150 mesh, 80-120 mesh |
| FEPA | F60 F80 F100 F120 F150 F180 F220 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000 -325 eyes F60-150 F80-120 |
| HE | #60 #80 #100 #120 #150 #180 #220 #240 #280 #320 #360 #400 #500 #600 #800 #1000 #1200 #1500 #2000 #2500 #3000 #4000 #6000 #8000 -325 eyes 60-150 eyes 80-120 eyes |
Package
| 1 | 1 kg package |
| 2 | 20kg paperbag |
| 3 | 20kg drum |
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