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Aluminium Nitride - Machineable - Goodfellow, online source, sources, small quantity,quantities   (Site not responding. Last check: 2007-10-15) Buy small quantities online of Aluminium Nitride - Machineable for research and/or development Although the thermal conductivity is not as high as Aluminium Nitride, it is still 50 times that of Machineable Glass Ceramic. Like Aluminium Nitride, applications include heat sinks and electronically insulating components for the high power electronic industry, and crucibles for molten metals. www.goodfellow.com /csp/active/static/E/Aluminium_Nitride_-_Machineable.HTML   (161 words)

Boron nitride - Wikipedia, the free encyclopedia Boron nitride (BN) is a binary chemical compound, consisting of equal proportions of boron and nitrogen. That is boron nitride possess three polymorphic forms; one analogous to diamond, one analogous to graphite and ones analogous to the fullerenes. Hexagonal boron nitride is produced by the nitridation or ammonolysis of boron trioxide. en.wikipedia.org /wiki/Boron_nitride   (1132 words)

Aluminum nitride - Wikipedia, the free encyclopedia Aluminum nitride (AlN) is a nitride of aluminum. Aluminum nitride is a (mostly) covalently bonded material, and has a hexagonal crystal structure which is isomorphic with one of the polytypes of zinc sulfide known as wurtzite. Aluminium nitride is resistant to attack from most molten salts including chlorides and cryolite. en.wikipedia.org /wiki/Aluminium_nitride   (429 words)

Aluminum nitride power having improved water-resistance - Patent 4923689 The aluminium nitride powder is generally prepared according to a direct nitriding method in which aluminium is heated in nitrogen or an alumina reducing method in which a mixture of alumina and carbon is heated in nitrogen. For treating the aluminium nitride powder to improve its water-resistance for obtaining the desired aluminium nitride powder of the present invention, the aluminium nitride powder is firstly dispersed in a suitable solvent. Alternatively, it is possible to improve the water-resistance for obtaining the desired aluminium nitride powder of the present invention by dry- or wet-type milling the aluminium nitride powder in the presence of the inorganic or organic phosphoric acid compound at room temperature. www.freepatentsonline.com /4923689.html   (4213 words)

Brevier Technical Ceramics Because the thermal expansion of aluminium nitride is similar to that of silicon, mechanical stresses created between these two materials under conditions of thermal stresses remain particularly small. Aluminium nitride ceramic is therefore used as a substrate for semiconductors, as well as for high-power electronic parts, housings and heat sinks. Aluminium nitride ceramics are less suitable for applications at temperatures above 1,000°C in environments containing water or oxygen, or under mechanical stress when simultaneously wetted by water. www.keramverband.de /brevier_engl/3/4/3/3_4_3_2.htm   (823 words)

Microstructural design with aluminium nitride ceramics for efficient heat exchangers in micro electronics Aluminium nitride ceramics are excellently suitable for this purpose because of their high thermal conductivity around 180 W/mK. The thermal resistance of aluminium nitride (AlN) substrates could be further diminished, if their thickness would be reduced.For that, the fracture strength of the ceramics has to be increased from nowadays 400 MPa (4 point bending strength) to values above 500 MPa. The aluminium nitride ceramics are developed in a joint project by the Fraunhofer ISC, CeramTec AG, Marktredwitz, and ANCeram GmbH, Bindlach. www.isc.fhg.de /english/portal/tech_13_e.html   (741 words)

Process for producing electric connecting means, in particular interconnection substrates for hybrid circuits - Patent ... The manufacture of thick copper layers on aluminium nitride presents further difficulties owing to the non-oxide character of this ceramic, which appears to be the cause of a low wetability of the aluminium nitride by the metals. Their results show that, with respect to all the tested substrates, the initial adhesions and the adhesions after aging measured in the case of an aluminium nitride substrate are about 50% weaker than the corresponding values obtained with respect to an alumina substrate. The firing of the thick copper layers on these preoxidized aluminium nitride supports is then effected in an inert atmosphere comprising, in the region of the polymer resin eliminating zone, an oxygen content lower than 250 ppm. www.freepatentsonline.com /5059450.html   (2472 words)

UK Supplier of Macor, Shapal, Boron Nitride, Oxides, Nitrides, Carbides   (Site not responding. Last check: 2007-10-15) Boron Nitride is an advanced synthetic ceramic material available in powder, solid, liquid and aerosol spray forms. Aluminium nitride is an interesting material and is one of the best materials to use if high thermal conductivity is required. When combined with its excellent electrical insulation properties, aluminium nitride is an ideal heat sink material for many electrical and electronic applications. www.precision-ceramics.co.uk /materials.htm   (347 words)

Products\Materials Surface Finishes   (Site not responding. Last check: 2007-10-15) Titanium Aluminium Nitride is a multi layer ceramic coating applied by PVD coating technology, which exhibits high toughness and oxidation stability. Nitriding is a process which is used to increase the hardness and wear resistance of the surface of a tool. It is particularly suitable for taps that are used on abrasive materials such as castings, bakelite, etc. Nitriding is used on twist drills when it is desirable to increase the strength and wear resistance of the cylindrical lands. www.sandvik.com /sandvik/1831/Internet/gb04004.nsf/Alldocs/About*Dormer*5CMaterials*2ASurface*Finishes   (564 words)

Volume X Paper Y   (Site not responding. Last check: 2007-10-15) Aluminium nitride (AlN) is a binary III-V compounds with a wurtzite-type structure. Aluminium nitride is mainly used as a high strength special material to harden the surface and in the microelectronics industry as a basic material acting for passivation of semiconductor surface, transmission of surface acoustic waves etc. [ ] When aluminium substrates were exposed to IPAP conditions, they showed a satisfactory growth of aluminium nitride with an improved hardness. www.cp.umist.ac.uk /jcse/Volume3/Paper13/v3p13.html   (3395 words)

AUFBAU1 [METALS: ALUMINIUM & ZINC COMPOUNDS] Aluminium and zinc are both used to test for the presence of nitrate ions. Aluminium chloride and zinc phosphide are both prepared directly by heating their respective elements. Aluminium hydroxide is used as a coagulating agent in helping to remove suspended solids from domestic water supplies. www.wissensdrang.com /auf1az.htm   (680 words)

Aluminum nitride   (Site not responding. Last check: 2007-10-15) Aluminium nitride (AlN) combines thermal conductivity (2-3 times that of aluminium oxide), strength, and heat resistance, and therefore can be useful as industrial refractory material. To make a sintered aluminium nitride product there are several methods, such as standard pressure sintering, reaction-sintering, or hot pressing. Aluminium nitride powder (99, 9% purity) can be purchased for 1000 DKK/kg. www.designinsite.dk /htmsider/m1018.htm   (130 words)

Puurunen: Preparation by Atomic Layer Deposition and Characterisation of Catalyst Supports Surfaced with Aluminium ... The goals of this work were to demonstrate the preparation of aluminium nitride type materials and evaluate their properties as catalyst supports. To obtain aluminium nitride in high-surface-area form suitable for catalyst applications, porous silica and alumina supports were surfaced with aluminium nitride by the atomic layer deposition (ALD) technique by repeating the separate, saturating reactions of gaseous trimethylaluminium (TMA) and ammonia. The aluminium nitride species were shown to be evenly distributed on the silica. lib.tkk.fi /Diss/2002/isbn9512261421   (894 words)

Synthesis of nanowires and nanoparticles of cubic aluminium nitride Nanostructures of cubic aluminium nitride were synthesized by DC arc-plasma-induced melting of aluminium in a nitrogen–argon ambient. The material flux ejected from the molten aluminium surface was found to react with nitrogen under highly non-equilibrium conditions and subsequently condense on a water-cooled surface to yield a mixture of nanowires and nanoparticles of crystalline cubic aluminium nitride. From these analyses cubic aluminium nitride was found to be the dominating phase for both nanowires and nanoparticles synthesized at low currents. stacks.iop.org /0957-4484/15/370   (406 words)

[No title] An analysis is made of the heating and melting of the surfaces of ceramic samples of aluminium nitride, silicon nitride, and boron nitride by low-intensity laser radiation. It is shown that the thickness of a molten surface layer is governed by the thermophysical properties of the material and by the relationship between its melting point and the intense-evaporation temperature. The derived dependence of the thickness of the molten layer on the radiation intensity is compared with the results of experiments on melting of aluminium nitride. www.turpion.org /php/paper.phtml?journal_id=qe&paper_id=921   (148 words)

METHOD OF MANUFACTURING ALUMINIUM NITRIDE CRYSTALS FOR SEMICONDUCTOR DEVICES (US3634149) A method of forming aluminum nitride single crystals of large area and silicon carbide-aluminum nitride heterojunctions using a modified Lely method. Aluminum nitride is introduced, as a vapor phase, into a furnace containing a plate-shaped monocrystal of silicon carbide at a temperature between 1800° and 2300° C. At those temperatures, aluminum nitride recrystallizes and condenses to deposit epitaxially on the silicon carbide. If the silicon carbide is of one conductivity type, the aluminum nitride can be suitably doped to be of the opposite conductivity type whereby a heterojunction is formed. www.delphion.com /details?pn10=US03634149   (218 words)

Aluminium Nitride / Aluminum nitride (AlN) Properties, Applications AlN was first synthesised in 1877 but it was not until the mid 1980s that its potential for application in microelectronics spurred development of high quality commercially viable material. AlN is resistant to attack by most molten metals, most notably aluminium, lithium and copper In the powder form it is susceptible to hydrolysis by water or humidity www.azom.com /details.asp?ArticleID=610   (363 words)

Nitride - Silicon Nitride - a reference guide from Engineeringtalk Aluminum Nitride Al-N. If we can help you in any way please call us and we would be happy to be of service. Aluminium Nitride is a high purity ceramic with superior microstructural and chemical Aluminium Nitride is the material of choice for a variety of high Boron nitride is a binary chemical compound, consisting of equal proportions of boron and Cubic boron nitride is one of the hardest materials known, internetask.com /itna/nitride.htm   (424 words)

Aluminium nitride This article provides details on how aluminium nitride is produced, key properties and its applications, including microelectronics. Shapal M is a machineable ceramic based on aluminium nitride with high strength and high thermal conductivity. Coatings such as titanium nitride can be deposited and will not erode away as do bonded diamond coatings. www.azom.com /SearchResults.asp?MaterialKeyWord=Aluminium+nitride   (478 words)

Aluminium Nitride   (Site not responding. Last check: 2007-10-15) Aluminium Nitride is a high purity ceramic with superior microstructural and chemical uniformity resulting in very consistent properties. It is manufactured with tightly distributed thermal and electrical properties that provide reliable performance in a variety of applications. Aluminium Nitride is the material of choice for a variety of high performance applications in markets worldwide as outlined here. www.ceramic-substrates.co.uk /AlN.htm   (208 words)

Low Temperature Nitride Semiconductor Growth Indium nitride is also grown at Macquarie using a radio-frequency reactive sputtering unit, despite the simplicity of this method it still provides the best quality InN. It is also important that the atomic spacing of the substrate and the nitride films should match as closely as possible to inhibit strain in the film i.e. The old apparatus used to create the highest mobility (fastest) indium nitride ever grown is still in existence at Macquarie University, and has recently been upgraded to attempt another Macquarie led assault on the old record. www.ics.mq.edu.au /~sbutcher/Research_page/Low_Temperature_Growth.htm   (2139 words)

Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations The reaction between aluminium and nitrogen was investigated in detail using NaF, KHF/sub 2/, MgF/sub 2/, CaF/sub 2/, PbF/sub 2/, BiF/sub 3/, AlF/sub 3/, and CeF/sub 3/ as catalysts. The optimum conditions for the formation of aluminium nitride were found to be: Catalyst = 5% KHF/sub 2/, temperature = 1000 deg C, and heating time = 3 hours. A method is also described for the preparation of aluminium nitride of low carbon content. www.osti.gov /energycitations/product.biblio.jsp?osti_id=4105078   (204 words)

Aluminium nitride is green alternative: News from State of the Art Aluminium nitride is green alternative: News from State of the Art A new line of custom high-power networks uses thin film on environmentally friendly aluminium nitride. Aluminium nitride was developed as a nontoxic alternative to beryllia. www.electronicstalk.com /news/sat/sat106.html   (299 words)

Aluminium, glass, ferrous, non-ferrous molten metal consumables and high temperature environment specialists at ... Aluminium, glass, ferrous, non-ferrous molten metal consumables and high temperature environment specialists at Pyrotek. Article published in Aluminium World, May, 2003, reviewing the use of a new distributor for dc sheet ingot casting. This article shows how TAB Refractories has emerged as a world leader in the provision of refractory linings for aluminium melting and processing furnaces. www.pyrotek.info /newsevents.asp?id=165   (579 words)

Silicon Carbide, SiC - Properties, Applications and Component Supplier   (Site not responding. Last check: 2007-10-15) Silicon nitride is an extremely hard material and is very useful for applications in which physical wear is of great importance. Silicon nitride also has very good thermal shock characteristics. Precision Ceramics are a UK supplier of Aluminium Nitride and Silicon Nitride. www.precision-ceramics.co.uk /nitrides.htm   (140 words)

An aluminium nitride light-emitting diode with a wavelength of 210[thinsp]nanometres : Nature   (Site not responding. Last check: 2007-10-15) An aluminium nitride light-emitting diode with a wavelength of 210[thinsp]nanometres : Nature An aluminium nitride light-emitting diode with a wavelength of 210 nanometres In addition, ultraviolet solid-state light sources are also attracting attention for potential applications in high-density optical data storage, biomedical research, water and air purification, and sterilization. www.nature.com /nature/journal/v441/n7091/abs/nature04760.html   (270 words)

Pyrolytic Boron Nitride (PBN) Morgan Advanced Ceramics Pyrolytic Boron Nitride (PBN) is a white solid material that is non-porous, and non-toxic. Whilst Boron Nitride can be formed by pressing/sintering methods, the high purity pyrolytic material is formed by a vapour deposition process. The material is highly anisotropic in its electrical and mechanical properties, and very resistant to thermal shock. www.morganadvancedceramics.com /materials/pbn.htm   (172 words)

boron nitride aluminium casting extrusion   (Site not responding. Last check: 2007-10-15) These properties are used to great advantage in Aluminium extrusion processes, in particular through the electrostatic application of the powder to the press block or billet. The use of special additives enhances the flow properties of the material and promotes consistent performance in conjunction with electrostatic spray equipment. boron nitride properties boron nitride powder boron nitride physical data boron nitride legal www.henze-bnp.de /boron_nitride_aluminium_casting_extrusion.html   (182 words)

J.J. Castings - Latest News This list is valid from now until September 2001 and we guarantee that these prices will be held for at least that period. Chromium Nitride (CrN) is used mainly for cold forming applications and for corrosion resistance. Titanium Aluminium Nitride (TiAlN) is used for very high speed machining and for "difficult-to-cut" materials. www.jjcastings.com /news.htm   (526 words)

Microwave power resistors, Aluminium Nitride AlN power chip resistors, 1P5W, 1P5 watts, 112GHz 3dB frequency, 50x25 ...   (Site not responding. Last check: 2007-10-15) Thin film technology is the preferred solution for all applications that require low noise, long term stability and excellent performance at very high frequencies. GENERAL DIE INFORMATION Substrate Aluminium Nitride AlN, Thickness (mils) 40±3,Die size (mils) LLL x WWW ±2 Bonding pads min 4x4 mils, 3µm thick, 99.99% electroplated gold with a TiW barrier, Backside metal Backside of the die is metallized with standard Ti/Pt/Au compatible with Au-Sn, Au-Ge or silver filled conductive epoxy. All thin film microwave products are manufactured using advanced semiconductors and thin film technologies including ultra-stable and self passivating Tantalum Nitride resistors, gold interconnect metallization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. www.usmicrowaves.com /res/power_aln/rp15015030-ALN2W-25w-3P5ghz_microwave_power_wraparound_resistors.htm   (1039 words)

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