Daim ntawv thov ntawm lub ntiaj teb tsis tshua muaj caij Praseodymium (pr).

Praseodymium (Pr) Txog 160 xyoo dhau los, Swedish Mosander nrhiav tau ib lub caij tshiab los ntawm lanthanum, tab sis nws tsis yog ib lub caij. Mosander pom tias qhov xwm ntawm cov khoom no zoo ib yam li lanthanum, thiab hu ua "Pr-Nd". "Praseodymium thiab Neodymium" txhais tau tias "ntsib" hauv Greek. Kwv yees li 40 xyoo tom qab, uas yog, xyoo 1885, thaum lub teeb lub teeb mantle tau tsim, Austrian Welsbach tau ua tiav ob lub ntsiab lus ntawm "praseodymium thiab neodymium", ib lub npe hu ua "neodymium" thiab lwm lub npe hu ua "praseodymium". Hom "npib" no tau sib cais, thiab lub caij praseodymium muaj nws lub ntiaj teb loj heev los qhia nws cov txuj ci. Praseodymium yog lub ntiaj teb tsis tshua muaj cov khoom siv loj, uas yog siv rau hauv iav, ceramics thiab cov khoom sib nqus.

praseodymium (Pr)

Praseodymium daj (rau glaze) atomic liab (rau glaze).

Pr-Nd alloy

praseodymium oxide hmoov

Praseodymium neodymium fluoride

Kev siv dav ntawm praseodymium:

(1) Praseodymium yog dav siv hauv tsev ceramics thiab niaj hnub siv ceramics. Nws tuaj yeem tov nrog ceramic glaze los ua cov xim glaze, thiab tuaj yeem siv los ua cov xim pleev xim rau ib leeg. Cov xim ua yog lub teeb daj nrog cov xim ntshiab thiab muaj kuab heev.

(2) Siv rau kev tsim cov hlau nplaum ruaj khov. Xaiv cov khoom pheej yig praseodymium thiab neodymium hlau es tsis txhob siv cov hlau neodymium ntshiab los tsim cov khoom siv hlau nplaum ruaj khov tuaj yeem txhim kho nws cov pa tiv thaiv thiab cov khoom siv kho tshuab, thiab tuaj yeem ua tiav rau hauv cov hlau nplaum ntawm ntau yam duab. Dav siv nyob rau hauv ntau yam khoom siv hluav taws xob thiab lub cev muaj zog.

(3) rau roj av catalytic cracking. Ntxiv cov enriched praseodymium thiab neodymium rau hauv Y zeolite molecular sieve los npaj roj av cracking catalyst tuaj yeem txhim kho cov kev ua, kev xaiv thiab kev ruaj ntseg ntawm cov catalyst. Tuam Tshoj tau pib muab tso rau hauv kev lag luam siv hauv xyoo 1970, thiab nws cov khoom siv tau nce ntxiv.

(4) Praseodymium kuj tseem siv tau rau polishing abrasive. Tsis tas li ntawd, praseodymium yog dav siv nyob rau hauv lub teb ntawm optical fiber.