Product name: Boron powder

State: Powder

Chemical formula: B

Particle size: 1-5 microns

Purity: 96%

Crystal structure: amorphous, crystalline powder

Appearance: Light brown to gray-black metal powder

Packing: 1000g/ bag, PE bag

Physical and chemical characteristics:

There are two stable isotopes of boron, 10B (atomic weight 10.0129) and 11B (atomic weight 11.00931), which are α-type rhomboid crystals at low temperatures, β-type rhomboid crystals at high temperatures, tetragonal crystals and amorphous crystals. The different physical properties of the body are also different. Relative density (α type) 2.46, (β type) 2.35, (tetragonal crystal) 2.31, (amorphous) 2.35. The melting point is 2190 ° C and the boiling point is 3680 ° C. Heat of vaporization 480kj/mol, heat of melting 50.2kj/mol, hardness 11, thermal conductivity (25℃) 27.4W/(m.K). Insoluble in water, hydrochloric acid, ethanol and ether. Dissolves in cold, concentrated lye and emits hydrogen. It can be oxidized to boric acid by concentrated nitric acid and sulfuric acid. At high temperatures, it can interact with oxygen, nitrogen, ammonia, sulfur, halogens and carbon to produce various compounds, but also directly combined with many metals to produce metal borides, can also react with organic compounds to produce organic borides, and react with hydrogen to form a series of covalent hydride - boranes. Amorphous boron powder is a kind of black brown powder, tasteless and odorless, chemical properties are relatively active, stable at air and room temperature, heated to 300 ° C when oxidized, to 700 ° C that is on fire, trace of vaporized boron flame is green. Crystalline boron is black-gray, a hard and brittle solid with a metallic luster and is more stable than amorphous boron. The element boron is easily absorbed by the intestine and can also be absorbed by the skin, and the toxic phenomenon is manifested by rash and central nervous system depression.

Product use:

(1) Fireworks industry: explosion initiator, boron flame is green.

(2) Fuel rich propellants for rockets and missiles.
(3) Nuclear industry: neutron counter tube, neutron absorber, reactor control rod.
(4) Car airbags: initiators.
(5) powder metallurgy additives, thermal spraying surface coating.
(6) Metallurgy: gas scavenger, special steel smelting.
(7) Semiconductor industry: doping elements.
(8) Pharmaceutical industry and organic synthesis: catalysts.
(9) Synthetic borides: boron-containing functional ceramics, boride superconductors, etc.
(10) Glass industry.
(11) Electronics industry: the ignition electrode (cathode material) of the ignition tube.
(12) Welding powder: an important part of the weapon welding.

Note:

Safety Note: This product is toxic by inhalation and ingestion. Inhalation affects the central nervous system, ingestion causes gastrointestinal irritation and boron poisoning, and skin and eye contact causes mild irritation. When operating, wear safety goggles, dust mask, rubber gloves.

Product packaging: Vacuum packaging, aluminum platinum bag lined with plastic bag. Each bag weighs 1Kg net.

Storage: Store in a cool, ventilated and dry warehouse. Shelf life is 12 months, expired recheck can still be used.

△ Product transportation: Violent collision, rain, exposure should be avoided during transportation, and can not be mixed with strong oxidants.

△ Others: In order to meet customer needs, the company can develop and develop products according to the special needs of customers.

Note: elemental boron is black or dark brown powder, oxidation in the air due to the formation of boron trioxide film and hinder the internal boron oxidation, amorphous boron chemical activity. Powder and air can form explosive mixtures. Preparation of amorphous boron by reducing boron anhydride with magnesium.

Boron powder technical index standard：