What is the role of osmium metal and what is the use of rhenium metal?

Period 6 of the periodic table is a group element, one of the platinum group metal members. The element symbol 0s, atomic number 76, relative atomic mass, belongs to the heavy platinum group metals.

It is used to make alloys with ultra-high hardness. Osmium is an alloy of rhodium, ruthenium, iridium or platinum and is used as a bearing in record players, tap nibs, and clocks and instruments.

Osmium is used as a catalyst in industry. In the synthesis of ammonia, if osmium is used as a catalyst, a high conversion rate can be obtained at a temperature that is not too high. If a little osmium is mixed with platinum, it can be made into a hard and sharp scalpel.

Osmium-iridium alloys can be made from the same amount of iridium as osmium. The small silvery-white dot on the nib of the iridium pen is the osmium-iridium alloy. Osmium-iridium alloy is hard and wear-resistant, and iridium nibs are more durable than ordinary steel nibs, and the key lies in this "little dot".

Osmium-iridium alloy can also be used as a bearing for clocks and important instruments, which is very wear-resistant and can be used for many years without damage.

Rhenium, a metallic element, is one of the metals with a high melting point. According to the authoritative professional book "Ranshi Handbook of Chemistry", the melting point of rhenium is 3180 degrees Celsius instead of 3440 degrees Celsius. Its melting point is lower than 3410 degrees Celsius of tungsten metal, which is not the metal with the highest melting point.

It can be used to make electric filaments, shells of artificial satellites and rockets, protective plates for atomic reactors, etc., and is chemically used as a catalyst. Rhenium has two naturally occurring isotopes: RE-185 is stable and RE-187 is radioactive.

Rhenium is a truly rare element. Its content in the earth's crust is smaller than that of all rare earth elements, only greater than those such as protactinium and radium. In addition, it does not form fixed minerals and is usually associated with other metals.

This makes it the last element to be found in nature.

Its uses: 1. Rhenium is mainly used as a catalyst in the petroleum industry.

2. Rhenium has high electronic emission performance and is widely used in radio, television and vacuum technology.

3. Rhenium has a high melting point and is a major high-temperature instrument material. At the same time, rhenium-containing alloys are also used in the manufacture of heat-resistant parts of aero engines, and about 80% of the world's rhenium is used in the production of aero engines.

High purity rhenium powder. 4. The alloy of rhenium and rhenium can also be used as an electron tube element and an ultra-high temperature heater to evaporate metal.

5. Tungsten-rhenium thermocouple does not soften at 3100, and adding 25% rhenium to tungsten or molybdenum alloy can increase ductility. Rhenium is used as a high-temperature coating on rockets and missiles, and rhenium is needed for instruments and high-temperature components used in spacecraft such as thermal shielding, arc discharge, and electrical contactors.

6. Rhenium metal and its alloys can be used to make tap pen nibs and high-temperature thermocouples. It is used as a catalyst in alcohol dehydrogenation, ammonia synthesis and other chemical industries. Rhenium-containing alloys are resistant to high temperatures.

Due to the presence of rhenium and dispersion, it is expensive, and its practical application has yet to be developed. It is also used to make electric filaments, shells for artificial satellites and rockets, protective plates for atomic reactors, etc.

The largest use of rhenium is as a catalyst in the petrochemical industry. At present, the world's rhenium consumption in this area accounts for more than 60% of the total consumption. Rhenium-containing tantalum and tungsten alloys are considered to be the most resistant to high temperatures, and have become important materials for aerospace, rockets and missiles.

Tungsten-rhenium thermocouples can measure high temperatures up to 3100. Rhenium-tungsten alloy is used to make electron tube cathodes, with a life 100 times longer than tungsten, and is used to manufacture electrical contactors, especially permanent magnet generator contactors for seagoing ships, which are durable. Rhenium-plated metals, such as the metal surface of spacecraft, can increase wear resistance.

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Rhenium is a rare refractory metal, which not only has good plasticity, mechanical and creep resistance, but also has good wear resistance and corrosion resistance, and can maintain good chemical inertness to most gases except oxygen.

Rhenium and its alloys are widely used in aerospace, electronics industry, petrochemical industry and other fields. Rhenium is very stable at high temperatures, wear-resistant, and can resist arc corrosion, making it a good contact material.

Because rhenium metal has a high melting point and is a major high-temperature instrument material, it can be used in the manufacture of heat-resistant parts of aero engines. In addition, the metal can also be used as a catalyst in the petroleum industry, and can be used in radio according to its relatively high emission performance.

Rhenium can be processed into plates, sheets, wires, wires, rods, high-temperature structural parts (nozzles, nozzles, heat-proof screens, etc.), elastic components and electronic components for aerospace and aviation.

Rhenium is a silvery-white metal. High hardness and high mechanical properties.

The main uses are electrodes, thermocouples, corrosion-resistant, high-temperature resistant alloys, and catalysts.

Rhodium gold is a silvery-white, hard metal.

Rhodium metal does not normally form oxides, and molten rhodium absorbs oxygen but releases it during solidification. Rhodium has a higher melting point than platinum and a lower density than platinum. Rhodium is insoluble in most acids, it is completely insoluble in nitric acid and slightly soluble in aqua regia.

Rhodium is a silvery-white, hard metal with the element symbol RH, rhodium is a platinum group of elements, and has high reflectivity.

Rhodium is a rare form of ***. It is a silvery-white metal, hardness, relative density. The melting point is high at 1966.

The main valencies are 2, 4, and 6. First ionization energy. At moderate temperatures, it is also resistant to most common acids (including aqua regia).

At 200-600, it can react with hot concentrated sulfuric acid, hot hydrobromic acid, sodium hypochlorite and free halogens.

Applications of rhodium gold

1. High catalytic activity and selectivity, long life. Rhodium and its alloys, rhodium-containing compounds, and complex catalysts can be used for the production of aldehydes and acetic acid, automobile exhaust gas purification, ammonia oxidation for nitric acid production, organic chemical synthesis of plastics, artificial fibers, drugs, pesticides, etc., and fuel cell electrodes.

2. High and stable reflectivity to visible light. It is often used for the coating of reflective surfaces such as special industrial mirrors, searchlights, and radars.

3. It has a high melting point, oxidation resistance and corrosion resistance, and is one of the most stable metals in chemical liquid. It can be used as a corrosion-resistant container, and can be used in the atmosphere at a high temperature of 1850, and pure rhodium crucibles can be used to produce calcium tungstate and lithium niobate single crystals.

4. Rhodium plating has high hardness (7500-9000MPa), wear-resistant, corrosion-resistant, and stable contact resistance. Rhodium-plated composites are excellent electrical contact materials, and rhodium can also be used for the coating of jewelry and other industrial instruments and gas-sensitive components.

The above content refers to Encyclopedia - Rhodium.

Rhodium is a silvery-white, hard metal, rhodium belongs to the platinum group of elements, with high reflectivity, rhodium metal does not form oxides, molten rhodium will absorb oxygen, released in the process of solidification. Rhodium has a higher melting point than platinum and a lower density than platinum. Rhodium is insoluble in most acids, completely insoluble in nitric acid, and slightly soluble in aqua regia.

The solution of rhodium salts, which has the reddish hue of roses, was discovered and isolated by Vulaston in 1803. <

1. Rhodium is a silvery-white, hard metal, rhodium is a platinum element, with high reflectivity, rhodium metal will not form oxides, molten rhodium will absorb oxygen, released in the process of solidification. Rhodium has a higher melting point than platinum and a lower density than platinum. Rhodium is insoluble in most acids, completely insoluble in nitric acid, and slightly soluble in aqua regia.

The solution of rhodium salts, which has the reddish hue of roses, was discovered and isolated by Vulaston in 1803.

2. Ruthenium, rhodium, palladium, osmium, iridium, and platinum are very small in the earth's crust. Except that platinum is in the earth's crust at a content of parts per billion.

5. In addition to the content of palladium in the earth's crust is 1 part per billion, the content of the four elements of ruthenium, rhodium, osmium, and iridium in the earth's crust is only 1 part per billion. And because they are mostly scattered in various ores, they rarely form large aggregates, so they are expensive. These 6 elements are chemically known as platinum group elements, plus silver and gold, collectively known as ***.

Californium, atomic number 98, is an artificial radioactive element.

Uses: 1. It can be used in the field of nuclear medicine for malignant tumors. The californium-252 neutron source can be molded to make the liquid code very small and fine, which other neutron sources can't do, so the neutron source is sent to the tumor site of the organ in the human cavity through a hose, or implanted into the tumor tissue of the human body**.

Especially for uterine cancer, oral cancer, rectal cancer, esophageal cancer, gastric cancer, nasal cavity cancer, etc., californium-252 neutron** has a very good guessing effect.

2. As a source of pyrolysis debris, it is used in nuclear research.