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Present form record of molybdenum element

  • Mosten
  • 27 Feb

In 1958, pastures on a New Zealand pasture withered and died, and herdsmen complained. But it was surprising to find a path across the pasture full of lush green grass. The scientists looked at the green grass belt and brought back the sample for the experiment, and finally found the answer. It turned out that miners on the east side of the ranch cut across the pasture, and the metal powder from their shoes fell to the ground, turning the grass green. The scientists dissolved the metal powder in fertilizer and let herdsmen sprinkle it on the pasture. Soon the dead yellow pasture became green. Scientists further found that this metal is the basic element in the configuration of biological nutrient solution, plant growth, human body are inseparable from it. On the other hand, it is widely used in industry, military and so on, and has been listed as a strategic metal in many countries. In fact, the appearance of this metal element is the result of scientists working closely together; its wide application is related to war. The new element "this thing is neither graphite nor lead. Why call it molybdenum?" one day in 1779, Swedish scientist Schaeler studied the soft black mineral molybdenum, in detail. Talk to yourself. Scheler was a famous scientist at the time. He not only discovered oxygen, but also studied other gases. He also liked to study ores and discovered scheelite. It turns out that molybdenum and galena, graphite are very similar, European merchants confuse the sale of them, many citizens use it instead of graphite to make lead pen core. After careful observation of molybdenum, galena and graphite, experience tells him that although these things are similar in appearance, their hardness and luster are different, and they should contain different elements. Guess whether right, experiment to prove. Scheler found that there was no chemical reaction between nitric acid and graphite. Lead nitrate, nitrogen oxide and water were formed by the reaction of nitric acid with lead, while sulfuric acid and a white solid were formed after reaction between nitric acid and molybdenum. This white solid is very difficult to dissolve in water, obviously not lead nitrate, so what is it? In order to understand the white solid, he found fellow chemist friend Bergman. Bergman, a professor of chemical analysis at Ubusala University, did not find a single element directly, but raised a large number of students who contributed to the discovery of chemical elements, including the Druyar brothers, who found tungsten. Find manganese element Gan, molybdenum interested in Elm and so on. Itundefineds a three-year-old. What is the unknown element? To find the answer, they used the furnace to restore molybdenum. It is a pity that the maximum temperature of the fire is not more than 500 degrees, and molybdenum cannot be moved at all, and the three-year experiment has not been successful. The eyes see no fruit, and Schiller sends the white solid to the students of Bergerman, and the Swedish chemist Elm. Elmundefineds other identity is a mine, with a number of experimental high-temperature furnaces. and mixing the molybdenum and the carbon powder, mixing with the flaxseed oil to form a paste, and finally putting the mixture into a sealed crucible for burning with a fire. After the linseed oil is carbonized, a high temperature of up to 1000 degrees is generated, so that the white solid is reduced to a silver-white metal powder. “The metal has a melting point of 2600 degrees!” Elm stared at the high temperature meter and couldnundefinedt believe his eyes. He gave the man a quick notice. Schiller came to Elm, and after a simple exchange, they repeated the experiment of reducing molybdenum. To facilitate the recording and dissemination, Schiller decided to take a name for the silver-white metal. It was said that the mineral called molybdenum, which had previously said the unknown element, was named molybdenum, and the element was Mo. After several years, Chinese scientists translated it into the “to make a difference”. Through three years of untiring efforts, the elements of the study are now in the shape of the research of the scientistsundefined mutual cooperation! One-wave three-fold and one-fold construction work The elements found in the eye of the scientists are really used in production for more than 100 years. Because it is the same as a strategic metal, such as titanium, tungsten, and so on, industrial production has a high degree of purity, and it is difficult to purify. In 1893, the scientist, Mothson, reacted at a high temperature by carbon and graphite, and finally made a solid-state solution with a purity of 96%. The solid state is the first to be used in the military. Due to the high strength, the low coefficient of thermal expansion and the strong thermal conductivity, the solid alloy is added to the alloy such as alloy steel, stainless steel and the like, and is used for manufacturing various military equipment; and the pure graphite wire made of the solid metal is used as a material for the high-temperature electric furnace and the cutting and processing. During World War I, the amount of tungsten increased dramatically, far from the war. The scientists found that it was half lighter than tungsten, and the strength was higher than that of tungsten, and it was used instead of, for example, in the manufacture of a warship, an inner bore of a gun, and so on. The first time the element was in his hand. Interestingly, after the end of the World War I, with the reduction of the war, the demand for food was reduced. The scientists began to explore new uses of the compounds and their compounds. They found that the molecules of the baboons have a layered structure that is easy to slide between the layer and the layer, so that it can be a solid lubricant. The lubricating agent is widely used in the field of mechanical industry and aerospace. Through the New Zealand herbage event in the late 1950s, it was recognized that the grass was the essential element of the plant. The scientists further study that the human body is also the essential trace element of the human body, which can be used to configure the nutrient solution of the human body, and the muscle of the heart contains a certain amount of trace elements, which together with some enzymes maintain the energy metabolism of the myocardium. In other words, one of the causes of a myocardial infarction is the lack or absence of a heart muscle in the heart. According to the experts, the high-content food is mainly soybean, beef, grape, and so on. Since then, the element has a place in the field of medicine. Strategic metal is the most precious After the outbreak of the Second World War, the elements of the United Nations were once again used as an alloy material in the manufacture of weapons such as warships, armoured vehicles and the like. The elements of the world are truly valued by the countries after World War II. In view of the special use of the Republic of China in the manufacture of military weapons, the countries of the post-war have listed them as strategic metals, and the corresponding strategic mineral reserve system is established. The reason for the establishment of a mineral reserve system in various countries is, on the one hand, that there is little in the earthundefineds crust. As a typical pro-copper element, the present invention is mainly present in the chalcocite as the main component. The molybadite, studied in the former text of sheller, is a gabion. China, Russia, Canada and other places in the world are mainly concentrated in China, Russia, Canada and so on, with the global resource reserve of about 11 million tons (2015).

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