Zirconiumdiborid

Zirconium Boride Struktur
12045-64-6
CAS-Nr.
12045-64-6
Bezeichnung:
Zirconiumdiborid
Englisch Name:
Zirconium Boride
Synonyma:
ZRB2 B;ZirconiuM borid;Einecs 234-963-5;ZIRCONIUM BORIDE;ZIRCONIUM DIBORIDE;zirconiumboride(zrb2);ZIRCONIUM BORIDE 95+%;Zirconium boride/ 99+%;ZIRCONIUM BORIDE: 99.5%;ZirconiuM Boride, Powder
CBNumber:
CB8773001
Summenformel:
B2Zr
Molgewicht:
112.85
MOL-Datei:
12045-64-6.mol

Zirconiumdiborid Eigenschaften

Schmelzpunkt:
3100-3500°C
Dichte
6,1 g/cm3
RTECS-Nr.
ZH7150000
Aggregatzustand
powder
Farbe
gray refractory solid; hexagonal, hexane
Widerstand (resistivity)
9.2 (ρ/μΩ.cm)
Wasserlöslichkeit
It is insoluble in water.
Crystal Structure
Hexagonal
Expositionsgrenzwerte
ACGIH: TWA 5 mg/m3; STEL 10 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3
EPA chemische Informationen
Zirconium boride (ZrB2) (12045-64-6)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher Xn
R-Sätze: 20/21/22
S-Sätze: 36
RIDADR  UN3178
WGK Germany  3
TSCA  Yes
HazardClass  4.1
PackingGroup  III
Bildanzeige (GHS) GHS hazard pictograms
Alarmwort Warnung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H228 Entzündbarer Feststoff. Entzündbare Feststoffe Kategorie 1 Achtung
Warnung
GHS hazard pictogramssrc="/GHS02.jpg" width="20" height="20" /> P210, P240,P241, P280, P370+P378
Sicherheit
P210 Von Hitze, heißen Oberflächen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.
P240 Behälter und zu befüllende Anlage erden.
P241 Explosionsgeschützte [elektrische/Lüftungs-/ Beleuchtungs-/...] Geräte verwenden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

Zirconiumdiborid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:

R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.

S-Sätze Betriebsanweisung:

S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.

Beschreibung

Zirconium diboride (ZrB2) is a highly covalent refractory ceramic material with a hexagonal crystal structure. ZrB2 is known as a UHTC with a melting point of 3246C. This together with its relatively low density of B6.09 g/cm3 (measured density may be higher due to hafnium impurities) and good high-temperature strength makes it a contender for high-temperature aerospace applications, for example, hypersonic flight or rocket propulsion systems. It is an unusual ceramic with relatively high thermal and electrical conductivities.

Chemische Eigenschaften

Zirconium boride, also known as zirconium diboride, a gray metallic crystals or powders. Mohs hardness 8, electrical resistivity 9.2 micro-ohm-cm (20°C), excellent thermal shock resistance, poor oxidation resistance above 1100°C. It was attacked very little by cold HCl, more rapidly by HNO3, and is dissolved by aqua regia. It reacts with H2SO4 and is readily attacked by fused alkali hydroxides, carbonates, and disulfides.
Zirconium diboride
Zirconium diboride (ZrB2) is a transition metal boride with a hexagonal crystal structure and P6/mmm symmetry. ZrB2 has a combination of metallic, ionic, and covalent bonds. Due to its strong covalent bonds, ZrB2 has a high melting temperature of 3250°C. This melting temperature classifies ZrB2 as an ultra-high temperature ceramic (UHTC). UHTCs have been proposed for use in many different applications due to their high melting temperatures (>3000°C), as well as their high strength and chemical inertness.

Physikalische Eigenschaften

Gray metallic crystals, excellent thermal shock resistance, greatest oxidation inertness of all refractory hardmetals. Hot-pressed crucible for handling molten metals such as Zn, Mg, Fe, Cu, Zn, Cd, Sn, Pb, Rb, Bi, Cr, brass, carbon steel, cast irons, and molten cryolithe, yttria, zirconia, and alumina. Readily corroded by liquid metals such as Si, Cr, Mn, Co, Ni, Nb, Mo, Ta and attacked by molten salts such as Na O, 2 alkali carbonates, and NaOH. Severe oxidation in air occurs above 1100–1400°C. Stable above 2000°C in inert or reducing atmosphere.

Verwenden

Zirconium boride is use to improve resistance in zirconia-based, carbon-bonded refractories in contact with ferrous melts. Used in nuclear applications, aerospace refractory, in cutting tools and to protect thermocouple tubes. It also used in use of its relatively high conductivity, especially for a ceramic.

Application

Zirconium diboride (ZrB2) is an ultra high termparature ceramic powder. With good high temperature strength, it is used in the aerospace industry for hypersonic flight or rocket propulsion. ZrB2 is a kind of senior engineering material broadly used in various fields. Refractory for aircraft and rocket applications, thermocouple protection tubes, high temperature electrical conductor, cutting tool component, coating tantalum, cathode in high-temperature electrochemical systems.

Industrielle Verwendung

Zirconium boride is a microcrystalline graypowder of the composition ZrB2. When compressedand sintered to a specific gravity ofabout 5.3, it has a Rockwell A hardness of 90,a melting point of 2980°C, and a tensilestrength of 241 to 276 MPa. It is resistant tonitric and hydrochloric acids, to molten aluminumand silicon, and to oxidation. At 1204°Cit has a transverse rupture strength of 379 MPa.It is used for crucibles and for rocket nozzles.

Synthese

Zirconium boride powder is mainly prepared by carbothermic reduction of ZrO2 powder and carbon black or graphite powder. The reaction equation is:
3ZrO2+B4C+8C+B2O3=3ZrB2+9CO↑
Zirconium boride obtained from zirconia and boron oxide by magnesiothermic MASHS.

Zirconiumdiborid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Zirconiumdiborid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 135)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
henan kanbei chemical co.,ltd
+undefined-86-1523780-4566 +undefined15237804566
henankanbeichemical@163.com China 511 58
PT CHEM GROUP LIMITED
+86-85511178 +86-85511178
peter68@ptchemgroup.com China 35451 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512
info@tianfuchem.com China 21675 55
career henan chemical co
+86-0371-86658258 +8613203830695
sales@coreychem.com China 29900 58
Chongqing Chemdad Co., Ltd
+86-023-6139-8061 +86-86-13650506873
sales@chemdad.com China 39916 58
Shaanxi Dideu Medichem Co. Ltd
18192627656
1012@dideu.com China 1338 58
Antai Fine Chemical Technology Co.,Limited
18503026267
info@antaichem.com CHINA 9641 58
Zhengzhou Alfa Chemical Co.,Ltd
+8618530059196
sale04@alfachem.cn China 12922 58
Hefei TNJ Chemical Industry Co.,Ltd.
0551-65418671
sales@tnjchem.com China 34571 58
Baoji Guokang Healthchem co.,ltd
+8615604608665 15604608665
dominicguo@gk-bio.com CHINA 9427 58

12045-64-6(Zirconiumdiborid)Verwandte Suche:


  • zirconium boride (zrb2) zirconium boride Zirconium boride(ZrB2)
  • ZIRCONIUM DIBORIDE: GRADE A, A PRODUCT OF H.C. STARCK
  • ZIRCONIUM DIBORIDE, GRADE B, A PRODUCT OF H.C. STARCK
  • ZIRCONIUM BORIDE: 99.5%
  • Zirconium boride, 99.5% (metals basis excluding Hf)
  • ZIRCONIUM BORIDE
  • Einecs 234-963-5
  • Zirconium diboride (zrb2)
  • Zirconium boride (metals basis excluding Hf)
  • Zirconium boride/ 99+%
  • ZirconiuM borid
  • ZirconiuM Boride, Powder
  • Zirconium boride, 99.5% trace metals basis
  • Zirconium boride powder (ZrB2)
  • ZIRCONIUM DIBORIDE, POWDER, <5 MICRON, 9 5%
  • Zirconiumboride,99.5%(metalsbasis)
  • ZRB2 B
  • ZIRCONIUM DIBORIDE
  • zirconiumboride(zrb2)
  • ZIRCONIUM BORIDE 95+%
  • Zirconium Carbide Powder , Cubic ,(ZrC)
  • Zirconium Boride ISO 9001:2015 REACH
  • Zirconium diboride, 99.5%
  • Zirconium diboride, APS 100-200 nm, 99.5%
  • Zirconium boride, 325 mesh, 99.5%
  • Zirconium boride powder (ZrB2) 0.5 μm
  • Zirconium boride, 325 mesh
  • Strontium (Sr) Sputtering Targets
  • 12045-64-6
  • B2Zr
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