Thaum twg thiab qhov twg Magnet Discovered

Cov hlau nplaum tsis yog tsim los ntawm tib neeg, tab sis yog cov khoom siv hlau nplaum.Ancient Greeks thiab Suav pom ib tug natural magnetized pob zeb nyob rau hauv cov xwm

Nws yog hu ua "magnet".Cov pob zeb no tuaj yeem nqus cov hlau me me thiab ib txwm taw tes rau tib qho kev taw qhia tom qab ua viav vias ntawm random.Cov neeg taug kev thaum ntxov tau siv cov hlau nplaum ua lawv thawj lub compass los qhia kev taw qhia ntawm hiav txwv.Thawj qhov kev tshawb nrhiav thiab siv cov hlau nplaum yuav tsum yog Suav, uas yog hais tias, ua "compass" nrog hlau nplaum yog ib qho ntawm Tuam Tshoj plaub qhov kev tsim khoom zoo.

Nyob rau lub sijhawm Warring States, Suav cov poj koob yawm txwv tau sau ntau yam kev paub hauv qhov kev hwm ntawm qhov tshwm sim hlau nplaum.Thaum tshawb nrhiav hlau ore, lawv feem ntau ntsib magnetite, uas yog, magnetite (tsuas yog tsim los ntawm ferric oxide).Cov kev tshawb pom no tau sau tseg ntev dhau los.Cov kev tshawb pom no tau sau tseg thawj zaug hauv Guanzi: "qhov twg muaj cov hlau nplaum ntawm lub roob, muaj kub thiab tooj liab nyob hauv qab."

Tom qab ntau txhiab xyoo ntawm txoj kev loj hlob, hlau nplaum tau dhau los ua cov khoom muaj zog hauv peb lub neej.Los ntawm kev sib xyaw cov alloys sib txawv, cov nyhuv tib yam tuaj yeem ua tiav raws li cov hlau nplaum, thiab lub zog sib nqus kuj tuaj yeem txhim kho.Tus txiv neej ua hlau nplaum tau tshwm sim nyob rau hauv lub xyoo pua 18th, tab sis cov txheej txheem ntawm kev ua cov hlau nplaum muaj zog tau qeeb kom txog thaum cov khoom tsim tawm.Alnicohauv xyoo 1920s.Tom qab ntawd,Ferrite magnetic khoomtau tsim thiab tsim nyob rau xyoo 1950 thiab cov hlau nplaum tsis tshua muaj hauv ntiaj teb (xws li Neodymium thiab Samarium Cobalt) tau tsim nyob rau xyoo 1970.Txog tam sim no, cov cuab yeej sib nqus tau tsim kho sai, thiab cov khoom siv hlau nplaum muaj zog kuj ua rau cov khoom me me ntau dua.