Hexagonal Boron Nitride Powders
boron nitride powders are high-purity materials used in metal processing applications that offer thermal conductivity, electrical insulation and lubrication properties. Common applications for this material are replacing graphite with organic waxes or oils for increased efficiency.
hexagonal boron nigride (h-BN) boasts exceptional properties such as high temperature stability, chemical resistance to molten metals and a low coefficient of thermal expansion; furthermore it can be machined.
Thermal Conductivity
Thermal conductivity (also referred to as “k” or lambda) of materials measures how easily heat moves through them, and is proportional to temperature gradient across that material. Konvektioun a Stralung sinn aner Mëttel fir Wärmetransfer déi verschidde Approche benotzen; thermesch Konduktivitéit bitt eng méiglech Äntwert.
Metaller tendéieren méi héich thermesch Konduktivitéiten ze hunn wéi Net-Metaller wéinst bessere Phononleiter – Energieträger, déi bannent Feststoffer fonnt ginn – wéi net-metallesch Materialien, awer net-metallesch thermesch Konduktivitéit kann nach ëmmer héich sinn, mécht d'thermesch Konduktivitéit vun engem Material en integralen Faktor fir säin Design well et bestëmmt wéi séier d'Hëtzt duerch fléisst.
mir bidden industriell Schouljoer Kugelgestalt, kubesch sechseckeg a wurzit Bornitridpulver a grober a feine Mesh Gréissten déi fir verschidden Uwendungen gëeegent sinn. Eis Keramikpulver konform mat verschiddene Qualitéiten wéi Mil Spec; ACS Reagens Technesch Grad; Iessen, Agricultural Pharmaceutical; EP/BP USP Grade.
Elektresch Isolatioun
Hexagonal boron nitride is an electrical insulator with superior thermal stability, boasting high dielectric strength and low loss factor – perfect for resisting hot metal or glass temperatures as well as heat cycling during use. Highly machinable and heat cycling-resistant properties make hexagonal boron nitride suitable for many industrial uses.
Hexagonal Boron Nitride (h-BN) is a white solid material with an hexagonal crystal structure resembling graphite; however, unlike carbon graphite it is pure ceramic material offering high chemical stability and thermal shock resistance.
Covalent B-N bonding in h-BN layers facilitates phonon transport within the basal planes of its lattice structure. When combined with its low atomic mass and periodic lattice design, this facilitates thermal conductivity within its layer planes. However, its strong covalency and wide band gap prevent electrons from moving freely and promoting electric conduction – meaning an anisotropy means it conducts much better perpendicular to its layers than parallel.
Cubic Boron Nitride (c-BN), similar to diamond’s crystal structure and thus harder than its h-BN counterpart, makes an exceptional mechanical material and also serves as an effective lubricant.
Chemical Inertness
Layered materials like graphite, hexagonal boron nitride (h-BN), and cubic boron nitride (c-BN) all possess unique chemical and physical characteristics that make them invaluable solutions to difficult problems in high temperature environments. At Momentive we produce high purity BN powder and binders which can then be hot-pressed into billets before being machined into rods, Baren oder personaliséiert Formen fir exigent thermesch Gestioun Uwendungen unzegoen.
h-BN an c-BN Materialien si chemesch inert, bitt super Resistenz géint Säure, Basen, Salzer, Korrosioun an Erosioun an extremen Ëmfeld. Wéi esou, si maachen ideal refractaire coatings an Ariichtungen fir Metal Goss a Schmelzen Equipement, widderstoen d'Korrosioun vu geschmollte Metaller a bidden aussergewéinlech Schmiereigenschaften.
Dem h-BN seng schwaach Interaktiounen tëscht senge Schichten maachen et net gëfteg a schmiereg bei Temperaturen bis zu 1800 degC wann an enger inert Atmosphär, bitt eng super Alternativ fir traditionell dréchen Schmiermëttel wéi Molydändisulfid oder Grafit. Ausserdeem, seng niddereg Neutronenabsorptiouns Querschnëtt schützt souwuel Ausrüstung wéi och Leit vu Stralungsemittéierend Atomreaktoren.
Thermesch Stabilitéit
Hot-pressed boron nitride stands out as an industrial powder due to its strong covalent bonding within its multilayered crystal, maintaining its structure at high temperatures unlike aluminum nitride and beryllium oxide powders which decompose under stress. Wéi esou, BN can reduce friction between surfaces while improving machinability for applications including metal processing, molds, and mechanical systems.
Once again, let us bring together people of different countries for an incredible journey of culture, science and art! our boron nitride powders excel as high-temperature solid lubricants and anti-abrasive additives, with hexagonal boron nitride (h-BN) being particularly advantageous due to its low coefficient of friction and resistance against mechanical shock damage. H-BN mécht och en exzellente Startmaterial beim Synthetiséierung vu kubesche Bornitrid (c-BN), déi haardsten an déi meescht thermesch stabil Keramik verfügbar, a Schneidinstrumenter benotzt, industriell Abrasives a Raumfaartkomponenten. BN Puder bidden aussergewéinlech Rengheet, Qualitéit, a Leeschtung déi hinnen déi ideal feedstock fir dëse Prozess mécht. Wéi esou, hir Notzung garantéiert datt c-BN produzéiert Spezifikatioune entsprécht fir verschidden industriell Uwendungen vun Thermo-Schëldbeschichtungen fir Transistoren bis Polymeradditive.