Video: Puas yog rhenium magnetic?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Rhenium , nyob rau hauv ntau, tsis yog ib Sib nqus cov khoom, tab sis nws hloov tawm nws yog nyob rau hauv tej yam kev sib txuas ntawm atomic scale. Cov kws tshawb fawb tau hais tias Sib nqus cov khoom uas lawv nrhiav tau tuaj yeem ua rau 2-D alloys txaus siab rau cov neeg uas tsim cov khoom siv spintronic.
Ntawm no, rhenium puas yog hlau lossis nonmetal?
Rhenium yog ib qho tshuaj lom neeg nrog lub cim Re thiab atomic naj npawb 75. Nws yog silvery-grey, hnyav, peb-kab hloov hlau nyob rau hauv pawg 7 ntawm lub periodic table. Nrog rau qhov kwv yees qhov nruab nrab concentration ntawm 1 feem ntawm ib billion (ppb), rhenium yog ib qho ntawm cov ntsiab lus tsis tshua muaj nyob hauv lub ntiaj teb crust.
Ib sab saum toj no, tsev neeg dab tsi rhenium belongs rau?
| Lub npe | Rhenium |
|---|---|
| Boiling Point | 3627.0°C dej |
| Qhov ntom | 21,02 g ib cubic centimeter |
| Theem ib txwm | Khoom |
| Tsev neeg | Hloov cov hlau |
Hauv qhov no, rhenium zoo li cas?
Rhenium yog ib tug tsawg, silvery-dawb, lustrous, ntom hlau. Nws tiv taus corrosion thiab oxidation tab sis maj mam tarnishes hauv huab cua ntub. Ntawm cov khoom, tsuas yog carbon thiab tungsten muaj cov ntsiab lus melting ntau dua thiab tsuas yog iridium, osmium, thiab platinum. yog tuab dua.
Yuav ua li cas Rhenium tau txais?
Kev lag luam rhenium tau txais los ntawm molybdenum roaster-flu plua plav pom nyob rau hauv tooj liab-sulfide ores. Txawm li cas los xij, rhenium tsis tshwm sim dawb nyob rau hauv cov xwm los yog ib tug compound nyob rau hauv ntxhia ores. Molybdenum muaj los ntawm 0.002 feem pua rau 0.2 feem pua rhenium , thiab lub caij yog pom dav dav los ntawm lub ntiaj teb crust.
Pom zoo:
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Yuav ua li cas nrhiav tau lub rhenium uas ploj lawm?
Nyob rau xyoo 1990, cov kws tshawb fawb tau rov tshuaj xyuas nws cov ntaub ntawv thiab txiav txim siab tias nws tau tshawb pom cov ntsiab lus 75, uas peb paub tias yog rhenium. Xyoo 1925, German chemists Walter Noddack thiab Ida Tacke pib txheeb xyuas cov ntxhia gadolinite. Lawv ntseeg tias lawv tau pom cov ntsiab lus uas ploj lawm 73 hauv cov pob zeb hauv av