Hlau nplaum tau los txoj kev ntev txij li hnub koj tseem hluas thaum koj tau siv cov xuab moos zoo nkauj yas cov hlau nplaum cov hlau nplaum rau koj tus niam lub qhov rooj tub yees. Niaj hnub no cov hlau nplaum muaj zog dua puas tau thiab lawv cov khoom ua rau lawv muaj txiaj ntsig zoo nyob hauv cov ntawv thov ntau yam.
Tsis tshua muaj lub ntiaj teb thiab tej hlau nplaum tej phab ntsa - tshwj xeeb tshaj yog cov hlau nplaum tsis tshua muaj kev lag luam thiab kev lag luam los ntawm kev nthuav dav cov ntawv thov lossis ua cov ntawv thov uas twb muaj lawm ntau dua. Thaum ntau tus tswv lag luam yog paub txog cov hlau nplaum, nkag siab dab tsi ua rau lawv txawv tuaj yeem tsis meej pem. Ntawm no yog qhov nrawm nrawm ntawm qhov sib txawv ntawm ob hom hlau nplaum, ntxiv rau qhov kev hloov siab ntawm lawv cov txheeb ze thiab qhov tsis zoo:
Tsis tshua muaj ntiaj teb
Cov hlau nplaum muaj zog kawg yuav tsim los ntawm cov neodymium lossis Samarium, ob qho tib si yog rau txoj kev lag luam hauv keeb kwm ntawm cov ntsiab lus. Samarium tau siv thawj zaug hauv xyoo 1970, nrog cov hlau nplaum neodymium tuaj rau hauv xyoo 1980s. Ob lub neodymium thiab Samarium muaj zog tsis tshua muaj lub ntiaj teb cov hlau nplaum thiab siv nyob rau ntau cov ntawv thov muaj xws li cov ntawv thov kev tshawb fawb.
Neodymium
Qee zaum hu ua NDFEt cov hlau nplaum rau cov khoom lawv muaj - neodymium, hlau thiab boron, cov hlau nplaum yog cov hlau nplaum muaj zog tshaj plaws muaj. Cov khoom lag luam lub zog siab tshaj plaws (BHMAX) ntawm cov hlau nplaum, uas sawv cev rau lub zog tseem ceeb, tuaj yeem ntau dua 50mgoe.
Qhov siab bhmax - kwv yees li 10 npaug dua li cov hlau nplaum ceramic - ua rau muaj kev ntxhov siab, uas txhais tau tias thaum nws dhau nws lub peev xwm ua haujlwm. TMAX ntawm neodymium hlau nplaum yog 150 degrees Celsius, kwv yees li ib nrab ntawm cov paarium cobalt lossis ceramic. (Nco ntsoov tias qhov ntsuas kub uas poob ntau ntawm cov hlau nplaum uas poob lawv lub zog thaum raug cua sov tuaj yeem sib txawv me ntsis raws li cov alloy.)
Hlau nplaum kuj tseem tuaj yeem muab piv raws lawv tus mob Tcurie. Thaum cov hlau nplaum yog rhuab rau qhov kub tshaj lawv tmax, feem ntau lawv tuaj yeem rov qab txias dua; Lub Tcurie yog qhov kub tshaj qhov rov qab yuav tshwm sim. Rau neodymium hlau nplaum, Tcurie yog 310 degrees Celsius; Neodymium hlau nplaum rhuab mus rau los yog dhau qhov ntsuas kub yuav tsis muaj peev xwm rov qab ua haujlwm thaum txias. Ob lub hlauerium thiab tej hub hlau nplaum muaj qhov kev xaiv siab dua, uas ua rau lawv xaiv tau zoo dua rau cov ntawv thov kub.
Neodymium hlau nplaum yog qhov tsis tshua muaj kev sib nqus los ntawm cov sib nqus sab nraud, tab sis lawv nyiam cov hlau nplaum thiab feem ntau yog coated thiab feem ntau cov hlau nplaum yog coated thiab feem ntau cov hlau nplaum yog coated thiab feem ntau cov hlau nplaum yog coated thiab feem ntau cov hlau nplaum yog coated thiab feem ntau cov hlau nplaum yog coated los muab kev tiv thaiv los ntawm kev tiv thaiv ntawm kev xeb.
Samarium cobalt
Samarium cobalt, lossis Saco, cov hlau nplaum tau dhau los ua muaj nyob rau hauv xyoo 1970, thiab txij thaum lawv tau siv ntau yam kev siv. Txawm hais tias tsis muaj zog li neodysmium Magnet - Samarium cobalt cov hlau nplaum feem ntau muaj qhov kom tau txais ntau dua ntawm neodymium hlau nplaum. TMAX ntawm SAMARIAL COBALAL MOTET yog 300 degrees Celsius, thiab Tcurie tuaj yeem muaj ntau li 750 degrees Celsius. Lawv tus txheeb ze ntawm lawv lub peev xwm tiv taus cov kev kub ntxhov siab heev ua rau lawv zoo rau kev siv cua sov. Tsis zoo li cas iodymium hlau nplaum, Samarium cobalal hlau nplaum muaj qhov zoo rau xeb; Lawv kuj nyiam kom muaj tus nqi siab dua tshaj li keeb kwm neodymium.
Iav dawb
Ua los ntawm tog barium ferrite lossis strontium, tej hub hlau nplaum tau nyob ntev dua li lub ntiaj teb tsis tshua muaj hlau thiab tau siv thawj zaug hauv 1960. Cov hlau nplaum tej hlau feem ntau tsis tshua muaj nqi ntau dua li ntawm 3.5 - txog ib feem kaum lossis tsawg dua li ntawm cov hlau nplaum lossis tsis muaj suab paj nruag.
Hais txog cov cua sov, cov hlau nplaum tej hub muaj ib qho tmax ntawm 300 degrees Celsius thiab, zoo li Samarium Hlau nplaum, Ib qho Tcurie ntawm 460 degrees Celsius. Tej ke coilets yog cov tiv taus zoo heev rau kev xeb thiab feem ntau tsis tas yuav tsum muaj kev tiv thaiv txheej. Lawv yooj yim rau cov hlau nplaum thiab kuj yog tsis tshua kim tshaj cov neodymium lossis samarium cobal hlau; Txawm li cas los xij, cov hlau nplaum tej hub yog cov, ua rau lawv xaiv tsis zoo rau kev siv nrog kev daws teeb meem tseem ceeb lossis ntxhov siab. Cov hlau nplaum cov hlau nplaum feem ntau siv rau cov qauv siv hauv chav kawm thiab cov ntawv thov lag luam tsawg, xws li cov tshuab hluav taws xob qis lossis cov tshuab luam ntawv qis dua lossis cov tshuab luam ntawv qis dua lossis cov tshuab luam ntawv qis dua lossis cov tshuab luam ntawv qis dua. Lawv kuj tseem siv tau hauv cov ntawv thov hauv tsev thiab hauv kev tsim cov ntawv sib sib sib sib zog nqus thiab kos npe.
Lub Sijhawm Post: Mar-09-2022
