High Purity Zirconium Diboride
Zirconium Diboride Nanopowder Highly pure
Zirconium Diboride Nanopowder: (ZrB2) ceramics have a high melting point, high hardness, high electrical conductivity, excellent corrosion resistance against molten iron and slags, superb thermal shock resistance.
Zirconium Diboride Nanopowder: (ZrB2) is a highly covalent refractory ceramic material with a hexagonal crystal structure.
ZrB2 is an ultra-high-temperature ceramic (UHTC) with a melting point of 3246 °C.
This along with its relatively low density of ~6.09 g/cm3 (measured density may be higher due to hafnium impurities) and good high-temperature strength makes it a candidate for high-temperature aerospace applications such as hypersonic flight or rocket propulsion systems
It is one of the promising materials for high-temperature applications in several industrial sectors, such as foundry or refractory industries.
Zirconium Diboride Nanopowder: is wet by molten metals but is not attacked by them, making it a useful material for molten metal crucibles, thermowell tubes for steel refining, and in electrical devices: heaters and igniters.
Applications are also found in the aerospatial industry: hypersonic re-entry vehicles, leading edges, nose caps, rocket nozzle inserts, and air augmented propulsion systems components.
Zirconium Diboride Nanopowder: applications have been recently proposed in aerospace leading-edge parts on hypersonic re-entry spacecraft, rockets nozzle inserts, and air propulsion system compounds this material can be electrical discharge machined for its low electrical resistivity (~10u ohms m) tp produce complex-shaped parts.
Zirconium Diboride Nanopowder: Hypersonic flights, re-entry vehicles, and propulsion applications all require new materials that can perform in oxidizing or corrosive atmospheres at temperatures in excess of 2000°C and sometimes over the course of a long working life.
Ultra High-Temperature Ceramics (UHTCs) are good candidates to fulfill these requirements.
Within this family, the Zirconium Diboride and Hafnium Boride based composites are the most attractive.
Zirconium Diboride Nanopowder
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High Purity Zirconium Diboride Sputtering Target ZrB2
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Synthesis of sub-micro sized high purity zirconium diboride powder through carbothermal and borothermal reduction method.
Sub-micro-sized zirconium diboride (ZrB2) powders were successfully prepared via the boro/carbothermal reduction method using zirconium oxide and boron carbide as the primary raw materials.
The prepared mixtures were thermally reacted at 1250 °C for 1 h.
The optimized composition range containing the lowest oxide and carbide impurity, which was 0.14% of oxygen and 0.3% of carbon contents, was determined using crystallographic and elemental analysis.
The particle size was reduced from 5 µm to 245 nm by the addition of B4C as a reductant within a composition range that maintained the highest purity.
The morphology changed from faceted to angular hexagonal bar-like with a simultaneous growth in particle size.
Changes in the particle structure were a result of the existing liquid B2O3 phase during the reaction.
The 245-nm particles contained 12.1% oxygen content and 16.2% oxygen content for the 5-μm particle in the circumstance in which limited oxides could be produced.
ALB Materials Inc supply High Purity Zirconium Diboride (ZrB2) with high quality at a competitive price.
Zirconium Products, Boron Products
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Zirconium diboride, the metal structure compound of hexagonal system, is a kind of senior engineering material broadly used in various fields.
The composite ceramic made of zirconium diboride is featured with excellent performance due to high melting-point (3040℃), high hardness, high stability as well as good electrical conductivity, thermal conductivity, inoxidizability, and resistance to chemical corrosion.
1. Zirconium diboride may be used in the nuke industry due to its good neutron control ability because of the presence of Boron-10.
2. Zirconium diboride can be used as an aerospace refractory, in cutting tools and to protect thermocouple tubes.
3. Zirconium diboride can be used in the ceramic industry.
Size available: 50nm, 1um, 1-3um, 10-40um, -100+325mesh
In high purity materials field, purity can be list as 99.999% or 5N(five nine), accordingly, 2N=99%, 2N5=99.5%, 3N=99.9%, 3N5=99.95%, 4N=99.99%, 4N5=99.995%, 6N=99.9999%, 7N=99.99999%, 4N-6N means purity from 99.99% to 99.9999% etc.
High Purity ZrB2
High-temperature oxidation at 1900°C of ZrB2–x SiC ultrahigh temperature ceramic composite oxidation of ZrB2–SiC–ZrSi2 ceramics in oxygen evolution of structure during oxidation of zirconium diboride–silicon carbide in the air up to 1500°C
The oxidation resistance of HfB2–SiC composites for protection of carbon-based materials
Development and characterization of metal-diboride-base composites toughened with ultrafine SiC particulates
Influence of silicon carbide particle size on microstructure and mechanical properties of zirconium diboride–silicon carbide ceramics
High-temperature chemistry and oxidation of ZrB2 ceramics containing SiC, Si3N4, Ta5Si3, and TaSi2
Long-term oxidation behavior and mechanical strength degradation of pressureless sintered ZrB2–MoSi2 ceramics
Oxidation behavior of a MoSi2-based composite in different atmospheres in the low-temperature range (400–550°C)
The beneficial effect of water vapor on the oxidation at 600 and 700°C of a MoSi2-based composite
High-temperature and electrochemical oxidation of transition metal silicides
HIGH PURITY ZrB2 POWDER AND METHOD FOR PRODUCTION THEREOF
A high purity ZrB2 powder which has a purity of 99.9 wt % or more, the purity being exclusive of C and impurities in a gaseous form;
and a method for producing the high purity ZrB2 powder, which comprises a step of subjecting a raw material of a Zr sponge to an electron beam melting and a casting to prepare an ingot having a purity of 99.9 wt % or higher, a step of cutting the ingot into a cut powder and then hydrogenating the cut powder into ZrH2, a step of pulverizing the product, dehydrogenating into a Zr powder and oxidizing the Zr powder at a high temperature in an oxygen atmosphere into a fine powder of ZrO2, a step of admixing the fine powder of ZrO2 with B having a purity of 99.9 wt % or higher, to thereby reduce ZrO2 and prepare a ZrB2 powder having a purity of 99.9 % or higher.
The above high purity ZrB2 powder is a high purity ZrB2 powder for use in sintering having a purity of 99.9 wt % or higher, which is required for the manufacture of a ZrB2 single crystal substrate by the high-frequency induction heating FZ method (floating zone melting method) and which allows the production of a ZrB2 single crystal substrate having a large size and also the lowering of production cost associated therewith.
L’invention concerne une poudre de ZrB2 de grande pureté, supérieure ou égale à 99,9 % en poids, la pureté étant exclusive de C et des impuretés sous forme gazeuse ;
et un procédé de fabrication de la poudre de ZrB2 de grande pureté, comprenant une phase consistant à soumettre une matière première d’une éponge de Zr à une fusion par faisceau électronique et un coulage pour élaborer un lingot de pureté supérieure ou égale à 99,9 % en poids, une phase de découpe du lingot en poudre, puis d’hydrogénation de la poudre en ZrH2, une phase de pulvérisation du produit, de déshydrogénation en poudre de Zr et d’oxydation de la poudre de Zr à haute température dans une atmosphère d’oxygène en fine poudre de ZrO2, une phase de mélange de la fine poudre de ZrO2 avec B de pureté supérieure ou égale à 99,9 % en poids pour ainsi réduire le ZrO2 et élaborer une poudre de ZrB2 de pureté supérieure ou égale à 99,9 % en poids.
La poudre de ZrB2 de grande pureté ci-dessus est une poudre de ZrB2 de grande pureté pour utilisation dans le frittage de pureté supérieure ou égale à 99,9 % en poids, ce qui est requis pour la fabrication d'un substrat cristallin simple de ZrB2 par un procédé FZ de chauffage à induction haute fréquence (procédé de fusion de zone flottante) et qui permet la fabrication d’un substrat cristallin simple de ZrB2 de grande taille et une baisse des coûts de fabrication associés.
Zirconium Diboride with High Thermal Conductivity
purity, fully dense ZrB2. The purpose of this study was to characterize k for ZrB2 ceramics with high purity and relative density.
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