MAGNESIUM BORIDE Property

Melting point:

800°C

Density 

2.570

RTECS 

OM3078000

form 

Powder

color 

Dark Gray

Water Solubility 

Insoluble in water.

Merck 

13,5687

EPA Substance Registry System

Magnesium boride (MgB2) (12007-25-9)

Safety

Risk Statements 

15/29-22

Safety Statements 

22-24/25

RIDADR 

3134

WGK Germany 

3

TSCA 

Yes

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P330Rinse mouth.

MAGNESIUM BORIDE Chemical Properties,Usage,Production

Description

Magnesium diboride (MgB₂) is a simple ionic binary compound that has proven to be an inexpensive and useful superconducting material.

Chemical Properties

hexagonal crystal(s); -100mesh with 99% purity; refractory material [CER91] [KIR78] [LID94]

Chemical Properties

Magnesium Boride is brown solid, by reaction of boron oxide and magnesium powder ignited.

Physical properties

Its molecular weight is 45.9325 g/mol. Magnesium Boride melts at 830°C and is hexagonal with space group P6/mmm and lattice constants of a=3.0864? , c=3.5215 ?. The density is 2.625 g/cm³ and the hardness is 1260 kg/mm².

Uses

Chemical reagent.

Uses

Magnesium Boride exhibits super conducting properties and utilized in MRI superconducting magnet, which is a closed-loop cryocooler. It is used as propellants, pyrotechnics and explosives. It can be used as high temperature boron-based thermoelectric materials. It is also used in superconducting transformers, rotors, transmission cables, superconducting radio frequency cavities to minimize energy loss.

Preparation

Magnesium boride can be formed directly from the elements. Mg melts at 650 °C and boron melts at 2076 °C. Therefore, if a vapor of Mg metal at >750°C (red-heat) is passed over crystals of boron, reaction forms the desired boride. However, to obtain a stoichiometric compositions, it is better to heat the well-mixed powders of Mg and B to obtain specific compounds:
Mg + 2B→MgB₂

General Description

Magnesium boride (MgB₂) powder is a superconductive material which has a critical temperature (Tc) = 39K. It can be used for a variety of applications such as hydrogen storage, high energy fuel and high field superconductors.