Graphite pas nrig yog cov khoom tsis yog xim hlau uas yog ib qho tseem ceeb ntawm cov khoom siv ua ntej vuam hauv cov pa roj carbon arc cua gouging txheej txheem. Nws yog tsim los ntawm cov pa roj carbon thiab graphite nrog cov nplaum tsim nyog, extruded, ci ntawm 2200, thiab tom qab ntawd coated nrog ib txheej tooj liab. Nws yog resistant rau kub kub, muaj zoo conductivity, thiab tsis yooj yim tawg. Haum rau kev txiav hlau rau hauv cov duab uas ua tau raws li qhov yuav tsum tau ua.
Graphite pas nrig yog ib qho khoom siv hluav taws xob uas feem ntau siv rau hauv lub tshuab nqus tsev kub kub, nrog rau kev siv kub txog li 3000. Nws yog nquag oxidation ntawm qhov kub thiab txias thiab tsuas yog siv nyob rau hauv nruab nrab los yog txo cua sov tsuas yog nyob rau hauv lub nqus tsev vacuum. Nws thermal expansion coefficient yog me me, thermal conductivity yog siab, thiab kuj coefficient yog (8-13) 10-6m. Nws cov kev ua tau zoo dua li SiC thiab MoSi2, thiab nws tiv taus qhov kub thiab txias, huab cua txias, thiab kub kub, nrog tus nqi qis.
Graphite rods muab faib ua ntuj graphite rods thiab dag graphite rods. Nws yog ib tug crystalline carbon nrog metallic luster. Raws li cov ntsiab lus carbon, graphite rods muab faib ua high carbon graphite rods, nruab nrab carbon graphite rods, thiab tsawg carbon graphite rods. Graphite rods yog dav siv nyob rau hauv roj teeb technology electrodes, metallurgical refractory cov ntaub ntawv, tshuaj lubrication thiab sealing cov ntaub ntawv, thiab lwm yam teb. Raws li cov khoom siv ua haujlwm rau cov txheej txheem, nws yog siv rau hauv cov khoom siv hluav taws xob, tshuaj tiv thaiv corrosion, thiab cov txheej txheem conductive. Ntxiv mus, graphite rods, raws li ib yam ntawm cov khoom siv los tiv thaiv corrosion, muaj kev tiv thaiv corrosion zoo dua thaum cov tshuaj pigments xws li zinc daj ntxiv rau cov mis.
Raws li cov nplaim retardant muab tub lim, nthuav graphite rods yog interlayer tebchaw ntawm graphite rods kho tshuaj los yog electrochemically. Expandable graphite rods nthuav dav nyob rau hauv cov cua kub, suffocating nplaim taws thiab tsim cov khoom nthuav tawm uas tuaj yeem cais tawm, ncua, lossis cuam tshuam cov nplaim hluav taws. Tsis yog flammable, tsis mos, nrog zoo saj zawg zog, nto zog, thiab carbonization txheej zog.
Tsis tas li ntawd, qhov ntim thiab qhov ntau ntawm lub cev nthuav dav yuav tsum raug xaiv kom raug. Kev sim tau pom tias qhov loj me ntawm 150 microns, 30% nthuav dav tus nqi, thiab ntau npaum li cas ntawm 5% yog qhov tsim nyog heev. Yog li ntawd, graphite rods tuaj yeem siv ncaj qha los ua carbon conductive fillers lossis tuaj yeem ua rau cov khoom sib xyaw ua ke rau cov txheej txheem conductive. Txawm li cas los xij, vim muaj ntau ntawm graphite rods thiab nplai, qhov kev ua tau zoo ntawm cov txheej yuav ua nkig, uas rau qee qhov txwv tsis pub siv cov txheej txheem. Txhawm rau txhawm rau txhim kho cov kev coj ua ntawm graphite rods, tus nqi ntawm cov nplooj ntawv graphite ntxiv tuaj yeem txo tau zoo.
Piv nrog impregnated graphite, pob zeb sib tsoo pas nrig muaj cov yam ntxwv hauv qab no:
1. Cov txheej txheem ntau lawm yog correspondingly simplified, thiab cov khoom siv no tuaj yeem siv los tsim cov khoom graphite nrog crushed pob zeb number case, txo cov nqi.
2. Tsis tshua muaj porosity, cov qauv zoo sib xws, thiab zoo permeability.
3. Tom qab tsim, cov duab yog ntom thiab ci, thiab tsis tas yuav tsum tau ua haujlwm tshwj tsis yog qhov kawg txuas.
4. Lub thermal conductivity yog qis dua li ntawm impregnated graphite, thiab linear expansion coefficient siab dua.
5. Zoo heev tshuaj stability, thermal conductivity, conductivity, tshav kub tsis kam, thermal stability, thiab siab mechanical zog.