Lub hauv paus ntawm kev kho cov txheej txheem sintering kom ua tiav sintering yog kev tswj xyuas qhov kub thiab txias, tuav lub sijhawm, cua sov tus nqi, thiab kev tiv thaiv huab cua. Optimizing cov tsis muaj peev xwm ua tau zoo txhawb cov recrystallization ntawm magnesium oxide nplej, tsim ib tug ntom insulating qauv.
1. Kub thiab tuav lub sij hawm tswj
Sintering Kub: Yuav tsum ruaj khov ntawm 800-1000 degree, 900 ± 50℃pom zoo;
Tuav Lub Sijhawm: Tsis pub tsawg dua 1 teev, txhawm rau kom txaus recrystallization, nws raug nquahu kom ncua mus rau 1.5 teev;
Kev Txiav Txim Siab: Kub qis dhau (<800℃) or insufficient time will prevent grain growth, resulting in a loose powdery state.
Kev xyaum qhia tau hais tias tuav ntawm 900℃rau 1.5 teev tuaj yeem nce qhov ntom ntawm magnesium oxide los ntawm 12%, ua kom nws cov rwb thaiv tsev ruaj khov.
2. Kev tswj xyuas qhov kub thiab txias
Cua sov tus nqi: Tswj tsawg dua los yog sib npaug li 5℃/ min kom tsis txhob muaj kev ntxhov siab tawg ntawm lub plhaub thiab muab tub lim los ntawm thermal shock;
Txias txoj kev: Ntuj cua txias nrog rau qhov cub rau<200℃; water cooling or air cooling is strictly prohibited;
Cov Khoom Siv Yuav Tsum Tau: Siv lub tshuab hluav taws xob ntse sintering nrog PID tswj kom ua tiav segmented kub tswj thiab nkhaus kaw.
Kev kub ceev los yog cua txias tuaj yeem ua rau muaj qhov tsis xws luag. Txawm hais tias kev ntsuas hluav taws xob dhau mus rau lub sijhawm luv, qhov ntev - lub sijhawm ua haujlwm txaus ntshai heev.
3. Kev tiv thaiv huab cua optimization
Huab cua pom zoo: Siab-purity nitrogen (Ntau dua lossis sib npaug rau 99.99%) lossis qhov chaw nqus;
Oxygen Content Control:<100ppm to prevent oxidation of metal leads or carbonization of magnesium oxide at high temperatures;
Gas Flow Rate: Nthuav qhia cov roj inert kom tsis txhob muaj cov dej noo los yog impurities nyob hauv qhov cub.
Ib qho chaw tsis muaj zog txhim kho cov qoob loo zoo thiab txo cov micropore tsim, uas yog qhov tseem ceeb lav rau siab -kawg daim ntawv thov.
4. Txheej txheem validation thiab cov ntaub ntawv Traceability
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Yam khoom validation |
Txoj kev |
Kev lees txais |
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Ua kom tiav Thermal Control Curve |
Tsis siv neeg kaw los ntawm lub qhov cub ntse |
Kub, lub sij hawm, thiab tus nqi yog tag nrho traceable |
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Metallographic Analysis |
Sampling thiab soj ntsuam ntawm lub xeev grain |
Cov nplej tau loj hlob zuj zus thiab muaj txheej txheem ntom ntom |
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Hot State Test |
Kev ntsuas rwb thaiv tsev tom qab 30 feeb ntawm kev ua haujlwm nrog lub hwj chim tawm |
Ntau tshaj lossis sib npaug rau 200 MΩ (500V DC) |
Nws raug nquahu kom khaws cov txheej txheem cov ntaub ntawv ntsuas thiab cov ntawv xeem rau txhua pawg los pab txhawb kev taug qab kom zoo thiab txhim kho txuas ntxiv.
