Dab tsi yog cov hlau tsis tshua muaj nyob hauv lub neej niaj hnub?

Cov hlau tsis tshua muaj feem ntau yog cov hlau uas tsis tshua muaj nyob hauv cov xwm txheej, tawg lossis nyuaj rau rho tawm los ntawm cov khoom siv raw. Cov hlau hauv qab no feem ntau suav hais tias tsis tshua muaj: lithium, rubidium, caesium, beryllium, tungsten, molybdenum, tantalum, niobium, titanium, zirconium, hafnium, vanadium, rhenium, gallium, indium, thallium, germanium, scandium, thanum, cereal. praseodymium, neodymium, promethium thiab neodymium. Yuav kom kawm tau yooj yim, raws li ntau yam ntawm cov hlau tsis tshua muaj qee cov ntsiab lus (xws li lub cev thiab tshuaj lom neeg ntawm cov hlau, kev sib raug zoo ntawm cov khoom siv raw, cov txheej txheem ntau lawm, thiab lwm yam). , muab faib ua tsib pawg hauv qab no: 1) tsis tshua muaj teeb pom kev zoo; 2) tsis tshua muaj siab melting point hlau; 3) tsawg dispersion hlau; 4) cov hlau tsis tshua muaj hauv ntiaj teb; 5) Cov hlau tsis tshua muaj hluav taws xob. Cov hlau tsis tshua muaj feem ntau siv hauv kev lag luam metallurgical los tsim cov hlau tshwj xeeb, super-hard alloys thiab high-temperature resistant alloys. Cov npe ntawm cov hlau tsis tshua muaj kuj yog qee yam txheeb ze. Tsis yog tag nrho cov hlau tsis tshua muaj tsawg. Ntau cov hlau tsis tshua muaj ntau dua li cov hlau zoo tib yam hauv lub ntiaj teb, xws li zirconium, vanadium, lithium thiab beryllium, uas loj dua cov hlau lead, zinc, mercury thiab tin. Raws li kev siv thev naus laus zis, cov ciam teb ntawm lawv thiab cov hlau zoo sib xws tau ploj mus.