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Topic: Transparent aluminium


  
  Aluminium - Wikipedia, the free encyclopedia
Aluminium is found primarily as the ore bauxite and is remarkable for its resistance to corrosion (due to the phenomenon of passivation) and its light weight.
Aluminium mirror finish has the highest reflectance of any metal in the 200-400 nm (UV), and the 3000-10000 nm (far IR) regions, while in the 400-700 nm visible range it is slightly outdone by silver, and in the 700-3000 (near IR) by silver, gold and copper.
Aluminium was selected as the material to be used for the apex of the Washington Monument, at a time when one ounce cost twice the daily wages of a common worker in the project; aluminium was a semiprecious metal at that time.
en.wikipedia.org /wiki/Aluminum   (4966 words)

  
 Transparent alumina - Wikipedia, the free encyclopedia
Transparent alumina is alumina (aluminum oxide, Al) that is transparent.
This sintered alumina is very hard, nearly transparent, and has a very high melting point (2303 kelvins), yet like other sintered materials it can be produced at temperatures much lower than its melting point.
In 2004, Anatoly Rosenflanz and colleagues at 3M in Minnesota used a "flame-spray" technique to alloy alumina (aluminium oxide) with rare-earth metal oxides to produce strong glass with good optical properties.
en.wikipedia.org /wiki/Transparent_alumina   (255 words)

  
 Encyclopedia :: encyclopedia : Aluminum   (Site not responding. Last check: 2007-10-20)
Transparent aluminium with traditional aluminium is theoretically possible, at least at certain wavelengths, provided that photonic bandgaps that are transparent over narrow ranges of wavelengths can be introduced into the aluminium.
These are presently produced through the doping of the aluminium with appropriate elements in transparent alumina and in ruby, corundum, sapphire, and related aluminium compounds.
Traditional photonic bandgaps, based on introducing spatial holes in aluminium, are likewise possible, but these would require the introduction of numerous physical holes with roughly the diameter of the wavelengths of light for which transparence were desired; but such would presumably weaken aluminium structures.
www.hallencyclopedia.com /Aluminum   (1045 words)

  
 Aluminium
Powdered aluminium and rust in the approximate ratio of 1:3 are packed in a refractory crucible with a magnesium ribbon, or a powder of magnesium and barium peroxide, to ignite it.
Aluminium can be protected by a thick layer of oxide made by electrolysis, a process called "anodizing." The surface is first thoroughly cleaned and degreased in trichloroethylene, or by electrolysis, where the aluminium is the cathode and the grease driven off by the evolved hydrogen.
Aluminium sulphate is found in nature as the rare mineral Kalinite, which is soluble in water, so it is found only near volcanoes and such places where it is make by the action of sulphuric acid on clays, such as on Lipari, near Vesuvius, and a few places in Germany and South America.
www.du.edu /~jcalvert/phys/alumin.htm   (4695 words)

  
 Transparent Aluminum -- Recommendations and Resources   (Site not responding. Last check: 2007-10-20)
Transparent aluminum is theoretically possible, at least at certain wavelengths, provided that photonic bandgaps that are transparent over narrow ranges of wavelengths can be introduced into the aluminum.
These are presently produced through the doping of the aluminum with appropriate elements in transparent alumina and in ruby, corundum, sapphire, and related aluminum compounds.
Rubies are transparent and made of alumina (aluminum oxide) with a minor impurity of chromium.
www.becomingapediatrician.com /health/150/transparent-aluminum.html   (1006 words)

  
 Aluminium oxynitride - Wikipedia, the free encyclopedia
Aluminium oxynitride (AlON) is a transparent ceramic composed of aluminium, oxygen and nitrogen.
It is currently the crucial outer layer of experimental transparent armor being considered by the US Air Force for the windows of armored vehicles.
The formed objects are then densified by heating in an oven, and polished until transparent.
en.wikipedia.org /wiki/ALON   (212 words)

  
 :::: ART METAL ::::
Electric equipment includes a fuse panel installed in the aluminium pole base and protected by the doors, a 3x1,5² electric cable and an E27 or E40 ceramic lamp holder with a base for an electrical control gear.
Steel and aluminium construction: two types of masts - either a support for tramway or trolley-bus tractions or a lamp.
Aluminium elements coated with base - chemosetting paint and surface - polyvinyl paint.
www.art-metal.pl /st_eng/tech_eng.html   (1133 words)

  
 Comments on 15067 | MetaFilter
transparent aluminum was needed because they had to hold such-and-such amount of water with walls only so-and-so thick (i think it was an inch and a half, or the like).
transparent aluminum was the only option, but it wasn't available, so they gave the guy the formula.
Finally, I'm pretty sure they used the transparent aluminum for the whale tank, because when the subject of taking the whales back to the future in the Klingon ship was first broached, Scotty said they'd "just" need some transparent aluminum.
www.metafilter.com /comments.mefi/15067   (1209 words)

  
 New Scientist Breaking News - Windscreen repels armour-piercing bullets
A transparent material tough enough to withstand armour piercing rounds is being tested by the US Air Force.
Aluminium oxynitride, known commercially as ALON, could replace the existing bullet-proof glass on military vehicles, which is heavier and less tough.
ALON is a ceramic compound made from aluminium, oxygen and nitrogen, and has similar optical and structural properties to sapphire.
www.newscientist.com /article.ns?id=dn8180   (390 words)

  
 ChemTeam: Rutherford on the Discovery of Alpha and Beta Radiation
Thin prisms of glass, aluminium, and paraffin-wax were fixed at intervals on the lead plate with their edges just covering the slit.
Becquerel* examined the opacity of glass for uranium radiation in the solid and also in a finely-powdered state by the method of electric leakage, and found that, if anything, the transparency of the glass for the radiation was greater in the finely divided than in the solid state.
Aluminium is the most transparent of the metals used, but glass is more transparent than aluminium for the
dbhs.wvusd.k12.ca.us /webdocs/Chem-History/Rutherford-Alpha&Beta.html   (3808 words)

  
 Transparent Aluminum - Three Times Stronger Than Steel   (Site not responding. Last check: 2007-10-20)
A ceramic research lab in Dresden, Germany, has developed transparent Alumina by subjecting fine-grained (I'm guessing extremely fine-grained) aluminum to a whopping 1200 degrees Celsius...the result of which is amazingly light but three times tougher than hardened steel of the same thickness, and it's see-through.
Needless to say, the Pentagon is quite interested.
According to a post at Slashdot (News for Nerds) this is not transparent aluminum but transparent Alumina, which is aluminum oxide - Al2-O3.
www.rense.com /general20/transparentalum.htm   (84 words)

  
 Andalusite
Such crystals, opaque, and of a greyish or brownish colour, occur abundantly in the mica-schist of the Lisens Alp near Innsbruck in Tirol, while the first noted of the many localities of the mineral is in Andalusia, from which place the mineral derives its name.
The unaltered mineral is found as transparent pebbles with topaz in the gem-gravels of the Minas Novas district, in Minas Geraes, Brazil.
These pebbles are usually green but sometimes reddish-brown in colour, and are remarkable for their very strong dichroism, the same pebble appearing green or reddish-brown according to the direction in which it is viewed.
www.jewelry-paideia.com /reference/ref-gemstone-andalusite-1.php   (441 words)

  
 METAL (through Fr. fro... - Online Information article about METAL (through Fr. fro...
Aluminium is barely affected even at a white heat, if it is pure; the ordinary impure metal is liable to be very readily oxidized.
The most important of these are aluminium and zinc, which are converted into aluminate, AI(OK,Na)3, and zincate, Zn(OK,Na)2, respectively.
Sulphur.—Amongst the better known metals, gold and aluminium are the only ones which, when heated with sulphur or in sulphur vapour remain unchanged.
encyclopedia.jrank.org /MEC_MIC/METAL_through_Fr_from_Lat_metal.html   (5890 words)

  
 transparent fencing   (Site not responding. Last check: 2007-10-20)
Composed of panels in a choice of one or two metres length, this transparent fencing has aluminium posts and frames which ensure this fencing is robust and secure.
The aluminium frame paintwork is guaranteed for 5 years.
The framework is made of thermolacquered aluminium, the panels are made of transparent Altuglass.
www.mippfastfitkitpools.com /transparent_fencing.html   (188 words)

  
 digg - Transparent Aluminum
Nevertheless, it's not impossible that a transparent form of aluminum could someday be fabricated.
Transparent Aluminium (there is an extra i in there) was fact before Star Trek 4, you morons!
Therefore, alumina, though often transparent and found in your typical high school class ring, is never called glass.
digg.com /tech_news/Transparent_Aluminum   (2305 words)

  
 GIANNELLI SILENCERS S.p.A
Our handcrafters care and attention to all the details is not hidden by the protective transparent varnish that gives the pipe an aggressive and sportive look similar to the ones used by competition sportbikes.
This line is available in carbon fibre and aluminium, in high and low-mount version, with a 100 and 110 mm diameter round silencer.
The look of the system is clearly aggressive and racing provided by the transparent protective paint which doesn’t hide the welding and the colour of the material used.
www.giannelli.com /eng/prodotti/lin.asp?id=   (3448 words)

  
 TENAX ALUMINET thermo reflecting screens, TENAX agriculture
TENAX ALUMINET 90 DB comprises two woven structures, the first one in aluminium and the second in fl colour that create a shade density of 90%.
TENAX ALUMINET RDS is manufactured with the majority of the net comprising aluminium and to a lesser extent with fl polyethylene.
It is used in the greenhouses where it can be attached to the two ends and for dividing the structure to increase insulation.
www.tenax.net /agriculture/products/aluminet.htm   (389 words)

  
 Transparent Aluminum Used To Make Tinfoil Hats: Science Fiction in the News
The formula for transparent aluminum was traded for thick plexiglas panels to help whales escape safely into the latter part of the 23rd century in Star Trek IV.
Although the name "transparent aluminum-foil hat" does not have the same kind of catchet as "tinfoil hat", its acronym TAFT (Transparent Aluminum-Foil haT) is in fact the name of our 27th president, a powerful protective symbol for the American people.
The obvious advantage of transparent alumnium-foil hats over the original tinfoil hats is that you can wear them and not be seen wearing them, even in public.
www.technovelgy.com /ct/Science-Fiction-News.asp?NewsNum=79   (495 words)

  
 MINERALOGY - LoveToKnow Article on MINERALOGY   (Site not responding. Last check: 2007-10-20)
Even when the substance is opaque in large masses, it may be sufficiently transparent when in small splinters or in thin sections for the determination of the optical characters.
Crystals of fluor-spar of an emerald-green, purple, golden-yellow, bright pink or other color are at first sight very different in appearance, and yet the difference is due solely to the presence of traces of coloring matters so small in amount that their exact nature is difficult or impossible to determine.
An important character of transparent crystals is that of unequal absorption in different directions; so that light will, as a rule, be differently colored according to the direction in which it has travelled through the crystal: this is known as dichroism or pleochroism (see CRYSTALLOGRAPHY).
www.1911ency.org /M/MI/MINERALOGY.htm   (7055 words)

  
 Fracasso S.p.A.
Fracasso S.p.A. Noise barrier composed by sound-absorbing and sound-deadening panels in steel or aluminium, transparent panels PMMA, concrete and posts.
The dimensions of the metal panels are: 115 mm width, 500 mm height and suitable length for a center to center distance of 3.0 m.
The dimensions of the transparent PMMA panels are: 15 mm thickness, 1000-2000 mm height and suitable length for a center to center distance of 3.0 m.
www.fracasso.it /uk/prodotti/scheda1.php?idt=188   (196 words)

  
 Boing Boing: Transparent armor
Traditional transparent armor is thick layers of bonded glass.
The new armor combines the transparent ALONtm piece as a strike plate, a middle section of glass and a polymer backing.
ALONtm is virtually scratch resistant, offers substantial impact resistance, and provides better durability and protection against armor piercing threats, at roughly half the weight and half the thickness of traditional glass transparent armor, said the lieutenant.
www.boingboing.net /2005/10/19/transparent_armor.html   (241 words)

  
 The Mercedes F300 Life Jet   (Site not responding. Last check: 2007-10-20)
The researchers employed a "space frame" design: extruded aluminium sections with cast nodes form a strong structure which not only weighs just 89 kilograms but also absorbs high crash forces.
On the underside the chassis is faced with double-skinned panels, between which is sandwiched a new aluminium foam for additional strength and sound insulation.
A two-part roof of aluminium and transparent polycarbonate provides protection against bad weather.The two halves of the roof are very light and can be easily removed whenever the mood takes the driver.
www.didyouknow.cd /whatsnew/mercedes.htm   (741 words)

  
 SadTech: Glass
The classic beer bottle knife shows just how sad glass is. You take a beer bottle, hold it by the neck, slam the bottom of the bottle on the table to shatter it, and what you are left with are several lethal shards attached to the neck that make a very effective weapon.
Corundum and saphire are not a form of transparent aluminium.
They are a form of aluminium oxide, a substance with very different physical properties to aluminium.
sadtech.blogspot.com /2005/06/glass.html   (1748 words)

  
 See-through Concrete (with Pics) (reddit.com)
It is not transparent in a normal way: instead it forms a projection of what is in front of it.
Transparent nanocarbon fiber is one of two things needed for nanocarbon to become the perfect material for everything.
If it can be made transparent and/or rigid, then it seems like the perfect substance.
reddit.com /info/3h2n/comments   (588 words)

  
 eBay.co.uk - transparent, Mobile Phone Cases Pouches, Beads, Women's Clothing items at low prices   (Site not responding. Last check: 2007-10-20)
Transparent Aluminum Case For Nintendo DS Lite NDSL
Transparent Game Card Case x5 For Nintendo DS Lite NDSL
Transparent Clear Phone Protector Nokia N70 Case Skin
search.ebay.co.uk /transparent_W0QQfsooZ1QQfsopZ1QQsascsZ1   (517 words)

  
 Scientists develop metallic glass - Engadget
The reason they needed transparant alluminum was that the thickness required to contain that much water would have been unfeasible without transparent alluminum.
Scotty only gave him the structure of transparent aluminum as "payment" for the material he needed, which was 6" thick plastic.
scotty did need the transparent aluminium as far as i rem, he gave the formula details in exchange for some of the stuff, as far as i know.
www.engadget.com /2005/03/31/scientists-develop-metallic-glass   (1557 words)

  
 Bicolor Glass Level Gauges
This instrument consists of a stainless steel body having trapezoid cross section and machined to have a longitudinal chamber and front holes uniformly distributed on the two not parallel faces.
On each hole a special high temperature resistant aluminium silicate transparent cylindrical glass is tightly pressed between a metallic cover and the body by means of bolts and nuts.
A special back illuminator (suitable also explosion proof) gives a sharp level reading by means of the contrast between bright color: green in lower part (liquid) and red in upper part (steam) of level gauge.
www.cesare-bonetti.it /Products/Level/bicol01.htm   (534 words)

  
 USAF testing new transparent armor - Transparent Aluminium - New Launches   (Site not responding. Last check: 2007-10-20)
Engineers at the Wright-Patterson Air Base, Ohio (AFPN) are testing a new kind of transparent armor -- stronger and lighter than traditional materials -- that could stop armor-piercing weapons from penetrating vehicle windows.
The Air Force Research Laboratory's materials and manufacturing directorate is testing aluminum oxynitride -- ALONtm -- as a replacement for the traditional multi-layered glass transparencies now used in existing ground and air armored vehicles.
The test is being done in conjunction with the Army Research Laboratory at Aberdeen Proving Grounds, Md., and University of Dayton Research Institute, Ohio.
www.newlaunches.com /archives/usaf_testing_new_transparent_armor_-_transparent_aluminium.php   (355 words)

  
 Bent New Product Store   (Site not responding. Last check: 2007-10-20)
Supplied with external transparent pouches, can be worn by its belt.
The utilization flexibility, due to the different hooking systems, permits to have a useful workstation, with interdchangeable accessories which permit different solutions of utilization.
Applied to the legs of the case transform it in a wheeled workstation.
www.boothent.com /store   (645 words)

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