Description: Each product is about 0.2 - 0.3 grams in weight and of a certain size. If you need other weights, you can contact the store owner for separate production. Osmium is a metal with a rather high density and presents a unique and charming blue color.Our store uses high-purity argon gas-protected arc melting or vacuum electron beam melting method to prepare various metal melt beads. The presence of a protective atmosphere can ensure that the metal surface is not oxidized. After the metal is melted, it directly solidifies from a liquid droplet shape into a solid. After solidification, it also always maintains the round droplet shape formed by surface tension when in liquid state. The overall shape is round and shiny with high density. Since such melt beads are all obtained by melting method, the crystal grains are relatively coarser than those obtained by powder metallurgy method, and the processing performance is poor. However, the cross-section will have a strong metallic luster and is an excellent sample in element collection.Osmium is a heavy platinum group precious metal and also a stable element with extremely low content in the earth's crust. It is even rarer than iridium. The world's annual output is less than one ton, which is very rare. And basically, metal osmium is sold in powder form. Osmium blocks obtained by powder metallurgy are already quite rare, and osmium obtained by melting close to the theoretical density is even rarer. Osmium is a simple substance with a rather high density in nature, with a density as high as 22.59 g/cm3 and an extremely high melting point of 3045 °C. Osmium usually exists in the form of pure metal or alloy in nature, and osmium is basically obtained as a by-product in the mining and refining processes of copper and nickel.Osmium powder is gray-blue, and osmium blocks present a deep and charming blue color. Although there are places on the Internet that say the blue color of osmium comes from osmium dioxide, the store owner has not found any evidence to prove that the blue color of osmium comes from osmium dioxide. Instead, the fresh fracture surface of osmium is also blue. Even if it is cut in an argon environment, it is blue. So the store owner believes that blue is the natural color of osmium.Metal osmium is hard and brittle and can be easily broken into powder.Due to the extremely high melting point of osmium and the possibility of generating osmium tetraoxide if not well controlled during the melting process, the melting of osmium is relatively difficult. Moreover, osmium raw materials are themselves very scarce and not easy to obtain. Therefore, dense osmium beads or osmium ingots obtained by the melting method are extremely rare.
Price: 18.2 USD
Location: Guangdong
End Time: 2024-11-18T09:12:27.000Z
Shipping Cost: 0 USD
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