Dab tsi yog graphitization?
Graphitization yog txheej txheem kev lag luam uas carbon tau hloov mus rau graphite.Qhov no yog qhov hloov pauv microstructure uas tshwm sim hauv cov pa roj carbon lossis cov hlau tsis tshua muaj hlau uas raug kub ntawm 425 txog 550 degrees Celsius rau lub sijhawm ntev, hais 1,000 teev.Qhov no yog hom embrittlement.Piv txwv li, microstructure ntawm carbon-molybdenum steels feem ntau muaj pearlite (ib qho sib xyaw ntawm ferrite thiab cementite).Thaum cov khoom yog graphitized, nws ua rau pearlite decompose rau hauv ferrite thiab randomly dispersed graphite.Qhov no ua rau embrittlement ntawm cov hlau thiab ib tug me me txo nyob rau hauv lub zog thaum cov graphite hais yog randomly faib thoob plaws hauv lub matrix.Txawm li cas los xij, peb tuaj yeem tiv thaiv graphitization los ntawm kev siv cov ntaub ntawv nrog kev ua haujlwm siab dua uas tsis tshua muaj siab rau graphitization.Ntxiv rau, peb tuaj yeem hloov kho ib puag ncig los ntawm, piv txwv li, nce pH lossis txo cov ntsiab lus chloride.Lwm txoj hauv kev los tiv thaiv graphitization yog siv cov txheej.Cathodic tiv thaiv ntawm cam khwb cia hlau.
Carbonization yog dab tsi?
Carbonization yog txheej txheem kev lag luam uas cov khoom organic hloov mus rau carbon.Cov organics peb tab tom txiav txim siab ntawm no suav nrog cov nroj tsuag thiab tsiaj txhu.Cov txheej txheem no tshwm sim los ntawm kev puas tsuaj distillation.Qhov no yog cov tshuaj tiv thaiv pyrolytic thiab suav hais tias yog ib txoj kev nyuaj uas muaj ntau yam tshuaj tiv thaiv ib txhij tuaj yeem pom.Piv txwv li, dehydrogenation, condensation, hloov hydrogen thiab isomerization.Cov txheej txheem carbonization txawv ntawm cov txheej txheem carbonization vim tias carbonization yog txheej txheem sai dua vim tias nws cuam tshuam ntau qhov kev txiav txim ntawm qhov loj dua.Feem ntau, cov cua sov siv tau tuaj yeem tswj cov qib ntawm carbonization thiab tus nqi ntawm cov khoom txawv teb chaws seem.Piv txwv li, cov ntsiab lus carbon ntawm cov seem yog li 90% los ntawm qhov hnyav ntawm 1200K thiab txog 99% los ntawm qhov hnyav ntawm txog 1600K.Feem ntau, carbonization yog exothermic cov tshuaj tiv thaiv, uas tuaj yeem tso rau ntawm nws tus kheej lossis siv los ua lub zog tsis muaj cov pa roj carbon dioxide.Txawm li cas los xij, yog tias cov khoom siv biomaterial raug hloov pauv sai sai hauv cov cua sov (xws li hauv kev tawg nuclear), cov khoom siv biomaterial yuav carbonize sai li sai tau thiab ua cov pa roj carbon ntau.
Graphitization zoo ib yam li carbonization
Ob leeg yog cov txheej txheem tseem ceeb hauv kev lag luam uas koom nrog cov pa roj carbon monoxide los yog cov khoom lag luam.
Dab tsi yog qhov txawv ntawm graphitization thiab carbonization?
Graphitization thiab carbonization yog ob txoj kev lag luam.Qhov sib txawv tseem ceeb ntawm carbonization thiab graphitization yog tias carbonization yuav hloov cov organic teeb meem rau carbon, thaum graphitization yuav hloov carbon rau graphite.Yog li, carbonization yog kev hloov tshuaj lom neeg, thaum graphitization yog kev hloov microstructure.
Post lub sij hawm: Sep-29-2021