Goldmium grades, chemical composition
Holmium is a rare-earth element of group III of the Mendeleev system, where it is designated as Ho. Chemical number 67. Its atomic weight is 164.93. It is a stable isotope of the lanthanoid group, a soft metal of a light gray color, very malleable and ductile. It is obtained by reduction of HoF3 fluoride with calcium. Swiss scientist J. Sore discovered this metal by spectral analysis in "erbium earth". And chemist P. Kleve from Sweden managed to isolate holmium oxides and named this element after the ancient name of the Swedish capital Holmia. Holmium is dissolved in the world's oceans in an amount of 2.2x10-7%, its content in the lithosphere is 1.3x10-4%. It occurs most often with other rare-earth elements in apatite, bastenesite, gadolinite, and monazite. In chemical compounds it is oxidized to +3. It is stable in the atmosphere of fluorine. Reacts with nitrogen, bromine, hydrogen and chlorine when increasing temperature.
|Atomic number Ho
|Atomic (molar) mass g/mol
|Melting point t ° C
|Boiling point t ° C
|Melting point kJ/kg
This rare earth metal refers to non-ferrous metals. It is used in the production of lasers and thermoelectric materials, metallurgy, microelectronics, nuclear energy (holmium borate). Holmium ions generate laser radiation in the infrared part of the spectrum with a wavelength of 2 microns. Holmium is used to produce powerful magnetic fields in the manufacture of pole tips of superconducting magnets. Here holmium+erbium alloy is indispensable. Radioactive isotope Ho-166 is used in analytical chemistry as a radioactive indicator. Holmium salts are relevant in the production of special glasses and as an activator for luminophores. This metal is used to produce rods, sheet, wire, and ribbon.
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Holmium ni sehemu ya dunia nadra ya kundi la III la mfumo wa Mendeleev, ambapo inaitwa Ho. Nambari ya kemikali 67 Uzito wake wa atomiki ni 164.93. Ni isotopu imara ya kundi lanthanoid, chuma laini ya rangi ya kijivu mwanga, sana malleable na ductile. Inapatikana kwa kupunguza HoF3 fluoride na kalsiamu. Mwanasayansi Mhispania J. Sore aligundua chuma hicho kwa kuchanganua rangi ya "ardhi ya erbiamu". Mtaalamu wa kemia wa Sweden, P. Kleve, aliweza kutenganisha oksidi za holmium na kuipa jina la mji mkuu wa Sweden, Holmia. Holmium ni kutoweka katika bahari ya dunia katika kiasi cha 2.2 × 10 7%, maudhui yake katika lithosphere ni 1.3 × 10 4%. Mara nyingi hutokea pamoja na elementi nyingine za ardhi nadra katika apatiti, bastenesiti, gadoliniti, na monaziti. Katika misombo ya kemikali ni oxidized kwa +3. Ni imara katika anga ya fluorine. Inaitikia na nitrojeni, bromu, hidrojeni na klorini wakati wa kuongeza joto. Kiasi cha atomiki (mol) g (mol) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyusha (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) - kiwango cha kuyeyuka (m) Ni kutumika katika uzalishaji wa lasers na vifaa thermoelectric, metallurgy, microelectronics, nishati ya nyuklia (holmium borate). Ioni za Holmium hutokeza mnururisho wa laser katika sehemu ya infrared ya spectrum na urefu wa wimbi wa 2 microns. Holmium hutumiwa kutokeza mashamba yenye nguvu ya sumaku katika utengenezaji wa ncha za nguzo za sumaku zenye kuongoza nishati nyingi. Hapa aloi ya holmium+erbium ni muhimu sana. Isotopu ya radioactive Ho-166 hutumiwa katika kemia ya uchambuzi kama kiashiria cha radioactive. Chumvi za holmium ni muhimu katika uzalishaji wa glasi maalum na kama activator kwa luminophores. Chuma hicho hutumiwa kutengeneza vijiti, karatasi, waya, na mkanda. Sisi kusambaza kuthibitishwa golmium-msingi rolled bidhaa kwa bei bora. Specification huonyesha data juu ya asilimia ya muundo na sifa za mitambo ya bidhaa. Kutoka kwetu ni rahisi kununua kwa wingi bidhaa yoyote nusu-imekamilika kwa ajili ya uzalishaji wa kiwango kikubwa. Sisi kwa hiari kushirikiana na wanunuzi wa rejareja. Kiwango cha juu cha huduma, kufuata GOST na viwango vya ubora wa kimataifa, majibu ya huduma ni uso wa kampuni yetu. Ununuzi kwa bei bora Uzalishaji wote kutoka kwa metali nadra zinazouzwa na Evek GmbH hukidhi viwango vya GOST na viwango vya kimataifa vya ubora. Sisi kutoa bidhaa nusu-mwisho wa ukubwa wa kawaida na desturi katika muda mfupi iwezekanavyo. Ubora wa juu, bei za busara na uchaguzi mpana wa bidhaa kuamua uso wa kampuni yetu. Kama mteja wetu wa kawaida, unaweza kutegemea mfumo wa punguzo la bei. Ushirikiano na sisi itakusaidia kutambua mipango yoyote ya uhandisi. Tunasubiri maagizo yako kwenye tovuti yetu.