12007-25-9 Usage
Description
Magnesium diboride (MgB2) is a simple ionic binary
compound that has proven to be an inexpensive and
useful superconducting material.
Chemical Properties
Different sources of media describe the Chemical Properties of 12007-25-9 differently. You can refer to the following data:
1. hexagonal crystal(s); -100mesh with 99% purity; refractory material [CER91] [KIR78] [LID94]
2. 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
Different sources of media describe the Uses of 12007-25-9 differently. You can refer to the following data:
1. Chemical reagent.
2. 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.
Check Digit Verification of cas no
The CAS Registry Mumber 12007-25-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,0,0 and 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 12007-25:
(7*1)+(6*2)+(5*0)+(4*0)+(3*7)+(2*2)+(1*5)=49
49 % 10 = 9
So 12007-25-9 is a valid CAS Registry Number.
InChI:InChI=1/2B.3Mg/q2*-3;3*+2
