What is amorphous boron and its applications?

Amorphous boron Amorphous boron is a form of boron. Elemental boron is rarely found in nature in its pure form but occurs as orthoboric acid or as borates. Boron’s energy bandgap of 1.50 to 1.56eV exceeds that of either silicon or germanium. It transmits portions of infrared. While a good conductor of electricity at high temperatures, boron’s conductivity drops significantly at room temperature. There are crystalline boron and amorphous boron as boron. Boron is tasteless and odorless. Amorphous boron is a brown powder; whereas crystalline boron is black, extremely hard (about 9.5 on Mohs’ scale), and a poor conductor at room temperature. In the periodic table of elements, boron is between metal element series and non-metal element series. Boron has many characteristics, such as strong electronegative, low atomic radius, and centralized nuclear charge, therefore, the chemical properties of boron are relatively active. The non-metal property of boron is similar to that of silicon. At high temperatures, boron can react with oxygen, nitrogen, sulfur, halogen or carbon, etc. Boron is stable at normal temperature, but it will be oxidized when heated to 300 and burned if heated to 700. Boron can be combined directly with many sorts of metals to form metal boride. High purity boron is crystalline. Crystalline boron may be prepared by the vapor phase reduction of boron trichloride or tribromide with hydrogen on electrically heated filaments.

Boron (B) Metal Powder Info

Chemical Name: Boron
Chemical Formula: B
Classification: Amorphous Boron & Crystalline Boron

Physical Properties
Amorphous Boron: fine powder 0.5 – 0.8 micron
Crystalline Boron: Granules, fine powder, and filaments. Crystalline fine powder available -325 mesh.

Chemical Properties
Amorphous Boron: 90-92% and 95-97%
Crystalline Boron: 99%, 99.5%, 99.9+%,99.995% and 99.9995%

Synonyms
Boracium, bore, boro, metallic boron, boron powder, boron, amorphous boron powder, crystalline boron powder, enriched boron powder, boron B-10 pieces, CAS #7440-42-8, MIL-B-51092, PA-PD-451, EINECS 231-151-2

Boron (B) Metal Powder CAS Number: CAS# 7440-42-8

What is amorphous boron used for?

• Amorphous boron is used as a rocket fuel igniter and in pyrotechnic flares. It gives the flares a distinctive green color. The most important compounds of boron are boric (or boracic) acid, borax (sodium borate), and boric oxide. These can be found in eye drops, mild antiseptics, washing powders, and tile glazes.
• Oxygen scavenger, semi-conductor dopant, rocket-propellant mixtures, pyrotechnic flares, refractory additive, cementation of iron & special purpose alloys, a neutron absorber in nuclear reactor controls, and radiation hardening.
• Elemental boron is used as a dopant in the semiconductor industry, while boron compounds play important roles as light structural materials, insecticides and preservatives, and reagents for chemical synthesis.
• Boron (amorphous powder) has been used as a boron source to synthesize hexagonal boron nitride (h-BN), boron-doped diamond (BDD), and europium-doped BN nanotubes.
• Recently research reports a study on the structural and transport properties of long in situ MgB2/Fe wires that are prepared by use of amorphous boron and nano amorphous boron powders with a 50-50% weight ratio. The wire samples are fabricated by means of a standard Powder-in-Tube (PIT) method. Transport measurements are applied under high magnetic fields, of up to 9 T, obtained in a Bitter magnet. Research finds that the use of a mixture of the amorphous boron and amorphous nano boron precursor powders at equal amounts is a very promising way to fabricate long wires without any degradation in transport engineering Jce values in the presence of low and moderate magnetic fields.

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