The arc-melting chamber is then sealed and evacuated with a vacuum pump to create a vacuum inside the chamber.The raw metal material (powder, sponge, etc.) is measured on a gram scale and placed in a copper or graphite mold within the arc-melting chamber.In a nutshell the arc-casting process works like this: This process is used either to obtain the appearance of a smooth and shiny arc-cast pellet or in some cases because of extremely high melting points (iridium, osmium and others). The first one is Bromine sealed in a glass ampoule within the plastic and the second is a crystalline disc of Tellurium:Ī Brief Description of the Arc-Casting Process On a different note, here are samples of elements preserved in clear plastic resin. Polished antimony exhibits a brilliant, deep crystalline structure: One made of Antimony weighing 1 kilogram. Like iridium, ruthenium has a high melting point and is extremely hard making the material difficult to fabricate into a rod:Ī larger rod made of pure Tin weighing 1 kilogram: This rod was very difficult to make due to the very high melting point (4400 degrees F) and the extreme hardness and brittleness of the material:Īnd one of Ruthenium at 12.5 troy ounces. Here's one made of Iridium at over 22 troy ounces. This one is Palladium weighing 12 troy ounces. At the time of the sale of this piece the market value of the metal in this piece was over $18,000.00. This one is of solid Platinum weighing over 21 troy ounces. One half of these rods was polished to a mirror finish with the other half left in an unfinished state. The first is one made of solid gold weighing over 19 troy ounces (over 1 pound!). (Click on each photo for a larger image). They are over 4 inches in diameter:Ī 1-kilogram (2.2 pounds) bar of pure Germanium metal (about 1 foot long):Ī perfect Osmium 10-gram piece even made it into a ring:įollowing is a stunning series of rods made of several pure metals. These are 1-kilogram cast ingots of Gadolinium and Samarium, respectively, cast special for a customer. It is over 2 inches long and over 1/2 inch in diameter: Here is another custom-made piece, a 140-gram Ruthenium bar. It is over 1 inch in diameter (25mm) and feels incredibly heavy in the hand as well as being a beautiful piece to view: See a detailed description of this manufacturing process by scrolling down this page.Ī 100-gram piece of iridium. Most of these pieces were made by the arc-casting process. If you are interested in having similar pieces made by us, simply send an email and let us know what you would like. This is a showcase of the capabilities we have to produce special items to customer's specifications. Here you will find photos of unusual or custom pieces that have been made special for select customers. Metallium, Inc: Rare, Exotic Metals and Elements for Sale - Photo Gallery
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