Hauv kev siv ib puag ncig ntawm cov ntaub ntawv tiv taus, xaiv thiab xaiv cov khoom siv tsis raug alloys tsis tsuas yog txuag cov nqi hauv kev tsim khoom, tab sis kuj tuaj yeem ua lub luag haujlwm loj tshaj plaws ntawm cov hlau tsis kam. Yuav ua li cas xaiv qhov ua tau zoo tiv thaiv xaim hlau nyob hauv peb cov txheej txheem kev yuav khoom lub neej tiag (Kang Copper wire, manganese tooj liab hlau)?
Kuv xav tias thaum yuav cov hlau tsis muaj zog tiv thaiv kab hlau (txuas txuas txuas, hlau tooj liab tooj liab hlau), peb yuav tsum muaj qee yam ntawm cov xwm txheej uas peb siv:
1. Ua haujlwm voltage: (V)
2. Siv hwj chim: (W)
3. Ua haujlwm kub: (℃)
4. Kev tiv taus ntawm 20 ° C:
5. Hom xov hlau: lub hnub qub lossis lub hnub qub
Yuav ua li cas thiaj paub qhov txawv ntawm kev xaiv cov hlau txuas thiab cov tooj liab tooj liab:
1. Kev khiav hauj lwm kub: Cov hlau txuas txuas muaj qhov kub thiab txias ntawm 0-400 ° C; manganin xaim muaj qhov kub thiab txias ntawm 5-50 ° C.
2. Kev tiv taus: qhov tiv taus ntawm cov hlau txuas ntawm 20 ° C yog 0.48 ± 0.03; resistivity ntawm manganin xaim ntawm 20 ° C yog 0.47 ± 0.03.
3. Cov khoom tseem ceeb: Cov hlau txuas txuas muaj 39%-41%ntawm cov ntsiab lus npib tsib xee, thaum cov ntsiab lus manganese tsawg dua 1%-2%; ntawm qhov tsis sib xws, manganese tooj liab hlau muaj ntau manganese, uas suav txog 11%-13%. Cov ntsiab lus npib tsib xee yog 2%-3%.
4. Nqe: Txij li cov hlau txuas txuas muaj ntau npib tsib xee, tus nqi kim dua li tooj liab tooj liab manganese.
Cov ntsiab lus: Rau cov hlau txuas txuas thiab cov hlau tooj liab tooj liab, qhov tiv thaiv ntawm ob yam tsis txawv ntau, yog li nws yog kev lag luam ntau dua los siv cov tooj liab tooj liab tooj liab thaum kub tsis kub heev.
Qhov sib txawv ntawm Constantan, Manganin thiab New Constantan:
Hlau txuas: qib 6J40. Hom tooj liab raws li cov hlau tsis kam yog cov hlau tsis muaj zog nrog tooj liab thiab npib tsib xee ua lub hauv paus tseem ceeb. Nws feem ntau siv rau kev ntsuas hauv kev ntsuas tam sim no thiab ua lub luag haujlwm tseem ceeb hauv kev ruaj ntseg ntawm tam sim no. Tam sim no cov thev naus laus zis thev naus laus zis thev naus laus zis thev naus laus zis tau paub tab heev, thiab qhov kub coefficient tuaj yeem ua tiav ± 40PPM.
Nta: Qhov ntsuas kub me me yog qhov me me, thiab nws muaj qhov kub ua haujlwm dav (ntau dua 480 degrees). Muaj zog oxidation tsis kam thiab ua haujlwm tau zoo heev.
Manganese tooj liab hlau: tiv taus hlau nrog tooj liab, manganese thiab npib tsib xee ua lub hauv paus tseem ceeb. Tsawg tsis kam, siab raug, tsis kub coefficient thiab ruaj khov zoo.
Nta: 1. Qhov ntsuas kub zoo 2. qhov kub me me coefficient 3. Cov thermoelectric muaj peev xwm me me thaum txuas nrog tooj liab hlau
Tshiab Constantan: Qib alloy yog 6J11, tooj liab-hlau raws cov hlau, cov khoom siv raw yog 1/3 ntawm cov hlau txuas, thiab qhov ntsuas kub tau loj dua piv nrog qhov txuas. Nws tsis tuaj yeem siv tau thiab yuav tsum tau electroplated nrog nickel lossis tin.
Yuav ua li cas thiaj paub qhov txawv ntawm cov hlau txuas, tooj liab tooj liab hlau thiab Kangtai tshiab:
Cov xim dawb yog qhov hloov pauv, xim tooj liab yog manganin, thiab qhov tshiab tas li kuj yog dawb, uas yog qhov sib zog ntau dua li qhov qub thiab manganese.
Peb qhia tias cov neeg yuav khoom yuav tsum tau them nyiaj mloog rau peb yam thaum yuav khoom:
1. Rau kev kuaj, nws yog qhov zoo tshaj los siv cov hlau txuas txuas
2. Rau shunting, manganese tooj liab hlau yuav tsum tau siv
3. Constantan xaim muaj zog tiv taus oxidation thiab yooj yim rau khaws. Kev tiv thaiv oxidation ntawm manganese-tooj liab hlau yog qhov tsis zoo me ntsis, thiab lub sijhawm yuav thiab khaws khoom tsis yooj yim kom ntev dhau.
