Praseodymium grades, chemical composition
General Characteristics
Praseodymium is in the third group of D. Mendeleev's table, where it is designated by the chemical symbol Pr. Atomic number No. 59, Refers to the lanthanides. atomic weight 140.9. The credit for the discovery of this metal belongs to Austrian chemist von Welsbach. In 1885 he was able to separate the rare-earth metal didim, previously considered indivisible, into neodymium and praseodymium. The word praseodymium translates from Greek as "light green twin. The lithosphere contains up to 9 g/t of this element. It is obtained from a mixture of other rare earth elements by chromatographic and extraction separation. This element is concentrated together with neodymium and other light lanthanides. Then praseodymium is separated from neodymium by electrolysis or metallothermic separation at 850 ° C.
| Pr atomic number | Atomic (molar) mass g/mol | Oxidation state | Density [g/cm3] | Melting point t ° C | Boiling point t ° C | Melting point kJ/kg |
|---|---|---|---|---|---|---|
| № 59 | 140,9 | 6,77 | 3, 4 | 1131°С | 3512°С | 11,3 |
Chemical properties
Under normal conditions it oxidizes slowly, but when heated rapidly it ignites, forming a mixture of 3- and 4-valent oxide. By calcining it in an atmosphere of CH4 or H2, Pr2 O3 oxide is obtained. PrO2 dioxide is formed in an O2 atmosphere at a pressure of 10 MPa.
Applications
Used as a base for magnetic alloys together with neodymium. In laser optics it is used for generation of infra-red radiation with wavelength of 1050 nm in creation of solid and liquid lasers. Praseodymium oxide gives glass a pale green hue. is used to optimize the performance of thermoelectric alloys of rare earth elements with a thermal EMF of 55 μV/K. The alloy of this metal with silicon and germanium is a superconducting material. Praseodymium is used in electric vacuum technology to increase efficiency of cathodes and in production of magnetic cores. Praseodymium salts help in controlling the nuclear magnetic resonance process. The metal is used for alloying steel, ceramics and medicine. In alloys with other nonferrous metals it is used for producing rounds, wires, sheets and strips.
Supply
We provide a wide range of praseodymium alloy products. All products are certified. Technical documentation includes data on chemical composition, limiting percentage of impurities; mechanical properties of products. We accept orders for products made of titanium alloy TH3 of standard and non-standard sizes at the best price We can buy in bulk any semi-finished products for large-scale projects. We also willingly cooperate with retail customers. European level of service and efficient service is the face of our company.
Buy at a bargain price
Provide for sale an unlimited range of rolled products based on rare metals of the highest quality at a competitive price. If you have difficulty in choosing, at your service experienced managers, who are always ready to assist and provide advice. Making an order with us, you will receive certified products that meet international quality standards in the shortest possible time. If you value your time, contact our nearest office today or place your order online.
