Magnesiumdiborid

Bezeichnung:Magnesiumdiborid

CAS-Nr12007-25-9

Englisch Name:MAGNESIUM BORIDE

CBNumberCB9175149

SummenformelB2Mg

Molgewicht45.93

MOL-Datei12007-25-9.mol

Synonyma

Magnesiumdiborid

Magnesiumdiborid physikalisch-chemischer Eigenschaften

Schmelzpunkt	800°C
Dichte	2.570
RTECS-Nr.	OM3078000
Aggregatzustand	Powder
Farbe	Dark Gray
Wasserlöslichkeit	Insoluble in water.
Merck	13,5687
EPA chemische Informationen	Magnesium boride (MgB2) (12007-25-9)

Sicherheit

R-Sätze:	15/29-22
S-Sätze:	22-24/25
RIDADR	3134
WGK Germany	3
TSCA	Yes

Gefahreninformationscode (GHS)

MAGNESIUM BORIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R15/29:Reagiert mit Wasser unter Bildung giftiger und hochentzündlicher Gase.
R22:Gesundheitsschädlich beim Verschlucken.
S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
Magnesium diboride (MgB₂) is a simple ionic binary compound that has proven to be an inexpensive and useful superconducting material.
Chemische Eigenschaften
Magnesium Boride is brown solid, by reaction of boron oxide and magnesium powder ignited.
Chemische Eigenschaften
hexagonal crystal(s); -100mesh with 99% purity; refractory material [CER91] [KIR78] [LID94]
Physikalische Eigenschaften
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.
Verwenden
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.
Verwenden
Chemical reagent.
synthetische
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
Allgemeine Beschreibung
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.

Magnesiumdiborid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

12007-25-9, MAGNESIUM BORIDE Verwandte Suche:

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