HOLMIUM CAS 7440-60-0
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Chemical Name: HOLMIUM
CAS No.: 7440-60-0
Molecular Formula: Ho
Molecular weight: 163.94
Sample: Available
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What is HOLMIUM?
With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is HOLMIUMwhich has developed particularly rapidly in recent years. Do you know about HOLMIUM?
The official answer: [1] is a metallic element with a chemical symbol ho, atomic number 67, atomic weight 164.93, and the name of the element derives from the birthplace of the discoverer. In 1878, Soritt discovered holium from the spectrum of erbium soil, and the following year Clive of Sweden separated holmium from erbium soil. The content of holmium in the earth’s crust is 0.000115%, and it is found in monazite and rare earth minerals along with other rare earth elements. The natural stable isotope is only holmium 165. Holmium is a silvery-white metal, softer and ductile; Melting point 1474 °C, boiling point 2695 °C, density 8.7947 g / cm3. Holmium is stable in dry air and oxidizes at high temperatures; Holmium oxide is the most known paramagnetic substance. Holmium compounds can be used as additives for new ferromagnetic materials; Holmium iodide is used in the manufacture of metal halide lamps – holmium lamps, and holmium lasers are also used in the medical field.
1), used as a metal halide lamp additive, metal halogen lamp is a kind of gas discharge lamp, it is developed on the basis of high-pressure mercury lamp, which is characterized by filling the bulb with a variety of different rare earth halides. Rare earth iodides are used, which emit different spectral light colors when the gas is discharged. The working substance used in the holmium lamp is holmium iodide, and a higher concentration of metal atoms can be obtained in the arc region, which improves the radiation efficiency.
(2), holmium can be used as an additive for ferro-yttrium or yttrium aluminum garnet;
holmium
holmium
(3), holmium-doped yttrium aluminum garnet (Ho:YAG) can emit 2μm laser, human tissue to 2μm laser absorption rate is high, almost 3 orders of size higher than Hd:YAG. Thus, when using Ho:YAG lasers for medical surgery, it can not only improve the efficiency and accuracy of the operation, but also reduce the thermal damage area to a smaller extent. The free beam of light produced by holmium crystals eliminates fat without generating excessive heat, thereby reducing thermal damage to healthy tissues, and it is reported that the treatment of glaucoma with holmium lasers in the United States can reduce the pain of surgery for patients. The level of 2μm laser crystals in China has reached the international level, and this laser crystal should be developed and produced.
(4) In the magnetostrictive alloy Terfenol-D, a small amount of holmium can also be added to reduce the external field required for saturation magnetization of the alloy [3].
(5), besides, the use of holmium-doped optical fiber can be made of fiber lasers, optical fiber amplifiers, optical fiber sensors and other optical communication devices will play a more important role in today’s rapid optical fiber communication.
Conclusion
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