Boron carbide
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Boron carbide
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CAS No:
12069-32-8
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Formula:
CB4
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Chemical Name:
Boron carbide
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Synonyms:
Boron carbide (B4C);Norbide;Tetraboron carbide;Tetraboron monocarbide;Boron carbide (B12C3);Denkaboron 1200;Denkaboron 1500;Boron carbide;Denkaboron F 1;F 1500;Tetrabor 1000;Tetrabor 500;Tetrabor 1500;HS (carbide);HS;Stark HS;ESK 1500;B 4C-C1005;DB 1031J;Ceralloy 546-3E;F 60;F 360;F 1200;Borcarbid HD 20;Boron carbide (B0.8C0.2);1500F;S 22;F 220;Boron carbide (BC0.25);12075-36-4;12676-28-7;37269-74-2;53239-04-6;216987-54-1;615561-49-4;1008796-82-4;1443765-60-3;1458684-27-9;2271194-30-8;2306414-01-5
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CAS No:
Characteristics
0
-2.87230
DryPowder; DryPowder, PelletsLargeCrystals; OtherSolid
2.33 g/cm3
2350ºC
3500ºC
Keep in a cool, dry location. Keep container closed when not in use.
Safety Information
NONH for all modes of transport
3
R20
S22-S36/37/39-S38
ED7420000
Xn
Stable. Incompatible with oxidizing agents. Not flammable.
P261, P264, P271, P280, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
H315
Not Classified
Boron carbide Use and Manufacturing
Boron carbide controls nuclear fission. It can absorb a large number of neutrons without forming any radioactive isotopes, so it is an ideal neutron absorber in nuclear power plants, and neutron absorbers mainly control the rate of nuclear fission. Boron carbide is mainly made in a controlled rod form in nuclear reactors, but is sometimes made in powder form to increase the surface area. In the 1986 Chernobyl nuclear accident, Russia dropped nearly 2,000 tons of boron carbide and sand to eventually stop the chain reaction in the reactor. Boron carbide can be used as an abrasive material. Boron carbide has long been used as a coarse abrasive material. Because of its high melting point, it is not easy to cast into artificial products, but by melting powder at high temperature, it can be processed into simple shapes for grinding, grinding, drilling and polishing of hard materials such as cemented carbide and gems. Boron carbide can also be used as a coating coating, including ceramic coatings for warships and helicopters, which is lightweight and has the ability to resist armor-piercing bullets from penetrating the hot-pressed coating into a monolithic defense layer. Boron carbide is used in the arms industry to make gun nozzles. Boron carbide, extremely hard and wear-resistant, does not react with acid and alkali, high/low temperature resistance, high pressure resistance, density ≥2.46g/cm3, Microhardness ≥3500kgf/mm2, bending strength ≥400MPa, melting point 2450℃. Because the boron carbide nozzle has the above wear-resistant and high hardness characteristics, the boron carbide sandblasting nozzle will gradually replace the known carbide/tungsten steel and silicon carbide, silicon nitride, alumina, zirconia and other materials. Boron carbide is also used in the manufacture of metal borides, as well as smelting sodium boron, boron alloys and special welding. Boron carbide, first reported in the Journal of the American Chemical Society, is obtained by the reaction of coke and boron oxide in an electric furnace, and this preparation method is also the method used in industrial production. 2B2O3+7C=B4C+6CO
500,000 - 1,000,000 lb
All other basic inorganic chemical manufacturing|Boron carbide (B4C): ACTIVE
Computed Properties
Molecular Weight:55.3
Exact Mass:56.0372207
Monoisotopic Mass:56.0372207
Heavy Atom Count:5
Complexity:106
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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