Qhov kev tiv thaiv oxidation ntawm graphite electrodes yog cuam tshuam los ntawm kev sib xyaw ua ke ntawm ntau yam, suav nrog qhov kub, oxygen concentration, crystal structure, electrode material properties (xws li graphitization degree, bulk density, thiab mechanical strength), electrode design (xws li qhov zoo ntawm kev sib koom ua ke thiab thermal expansion compatibility), thiab surface treatment (xws li antioxidant coatings). Cov hauv qab no yog kev tshuaj xyuas ntxaws ntxaws ntawm cov yam no:
1, Kub:
Tus nqi oxidation ntawm graphite electrodes nce ntxiv ntau nrog rau qhov kub nce siab. Saum toj no 450 ° C, graphite pib ua haujlwm nrog oxygen, thiab tus nqi oxidation nce ntxiv sai thaum qhov kub tshaj 750 ° C.
Thaum kub siab, cov tshuaj lom neeg ntawm qhov chaw graphite yuav ua rau muaj kev sib xyaw ua ke ntau dua, ua rau muaj kev sib xyaw ua ke sai dua. Piv txwv li, hauv cov cub hluav taws xob arc, qhov kub ntawm qhov electrode yuav tshaj 2000 ° C, ua rau kev sib xyaw ua ke yog qhov ua rau electrode siv ntau dhau.
2, Kev Ntsuas Pa:
Qhov concentration ntawm cov pa oxygen yog ib qho tseem ceeb uas cuam tshuam rau qhov oxidation ntawm cov electrodes graphite. Thaum kub siab, qhov thermal motion ntawm cov molecules oxygen yuav nce ntxiv, ua rau lawv yuav sib tsoo nrog graphite thiab txhawb kev oxidation.
Hauv cov chaw ua haujlwm xws li cov cub hluav taws xob arc, muaj cua ntau heev nkag mus rau hauv lub qhov hluav taws xob ntawm lub hau cub thiab lub qhov rooj cub, coj cov pa oxygen thiab ua rau cov electrode oxidation hnyav dua.
3, Cov Qauv Siv Crystal:
Cov qauv siv lead ua ntawm graphite yog qhov xoob thiab yooj yim rau kev tawm tsam los ntawm cov pa oxygen. Thaum kub siab, cov qauv siv lead ua ntawm graphite feem ntau hloov pauv, ua rau kev ruaj khov tsawg dua thiab kev ua kom oxidation sai dua.
4, Cov Khoom Siv Electrode:
- Qib Graphitization: Cov electrodes uas muaj qib graphitization siab dua qhia tau tias muaj kev tiv thaiv oxidation zoo dua thiab siv tsawg dua. Cov graphite uas muaj purity siab, nrog rau qhov kub graphitization feem ntau ncav cuag li 2800 ° C, qhia tau tias muaj kev tiv thaiv oxidation zoo dua piv rau cov electrodes graphite fais fab ib txwm (nrog rau qhov kub graphitization kwv yees li 2500 ° C).
- Qhov Ceev Ntawm Cov Khoom Siv: Lub zog kho tshuab, cov qauv elastic, thiab cov thermal conductivity ntawm cov electrodes graphite nce nrog rau qhov ceev ntawm cov khoom siv, thaum lub zog tiv taus thiab porosity txo qis. Qhov ceev ntawm cov khoom siv muaj feem cuam tshuam ncaj qha rau kev siv electrode, nrog rau cov electrodes ntawm qhov ceev ntawm cov khoom siv ntau dua qhia txog kev tiv thaiv oxidation zoo dua.
- Lub Zog Kho Tshuab: Cov hluav taws xob graphite tsis yog tsuas yog raug rau lawv qhov hnyav thiab lub zog sab nraud xwb tab sis kuj raug rau tangential, axial, thiab radial thermal stresses thaum siv. Thaum thermal stresses tshaj qhov mechanical strength ntawm lub electrode, tej zaum yuav muaj kab nrib pleb lossis tawg. Yog li ntawd, cov hluav taws xob uas muaj zog kho tshuab siab muaj zog tiv taus thermal stresses thiab zoo dua oxidation resistance.
5, Tsim hluav taws xob:
- Qhov Zoo ntawm Cov Pob Qij Txha: Cov pob qij txha yog cov qhov tsis muaj zog ntawm cov electrodes thiab yooj yim puas tsuaj dua li lub cev electrode. Cov yam xws li kev sib txuas xoob ntawm cov electrodes thiab cov pob qij txha, thiab cov coefficients thermal expansion tsis sib xws tuaj yeem ua rau oxidation sai dua thiab txawm tias tawg ntawm cov pob qij txha.
- Kev Sib Txuas Lus Txog Kev Nthuav Dav ntawm Thermal: Cov coefficients ntawm kev nthuav dav ntawm thermal ntawm cov khoom siv electrode thiab ib puag ncig kuj tuaj yeem ua rau electrode tawg. Thaum lub electrode dhau los ntawm kev nthuav dav thermal ntawm qhov kub siab, yog tias ib puag ncig lossis cov ntaub ntawv uas kov lub electrode tsis tuaj yeem nthuav dav raws li, kev ntxhov siab tshwm sim, thaum kawg ua rau tawg.
6, Kev Kho Mob Nto:
Kev siv cov txheej txheem antioxidant tuaj yeem ua rau muaj kev tiv thaiv oxidation ntawm cov electrodes graphite. Piv txwv li, RLHY-305 graphite antioxidant txheej tsim cov txheej txheem antioxidant ntom ntom ntawm qhov chaw substrate, muab cov khoom sealing zoo heev. Nws cais cov pa oxygen ntawm graphite ntawm qhov kub siab, thaiv cov tshuaj tiv thaiv ntawm graphite thiab oxygen, thiab txuas ntxiv lub neej ntawm cov khoom graphite tsawg kawg 30%.
Kev kho mob impregnation kuj yog ib txoj kev tiv thaiv antioxidant zoo. Los ntawm kev impregnating antioxidants rau hauv graphite electrodes los ntawm kev nqus tsev los yog kev ntub dej ntuj, qhov kev tiv thaiv oxidation ntawm cov electrodes tuaj yeem txhim kho.
Lub sijhawm tshaj tawm: Lub Xya Hli-01-2025