Lub ntsiab lus teb: C
Cov tshuaj formula ntawm graphite electrode tsuas yog C. Carbon muaj atomic tooj 6 thiab ib tug txheeb ze atomic loj ntawm 12.011, thiab graphite yog ib qho ntawm nws allotropes. Tsis muaj tshuaj lom neeg koom nrog: cov electrode yog ua los ntawm cov pa roj carbon monoxide, teem rau hauv daim ntawv crystalline, ua ke nrog cov hmoov tshauv tsawg heev - tsim cov ntxhia. Tias yog vim li cas tsis muaj ionic lossis molecular mis tuaj yeem sau rau cov electrode tag nrho, thiab vim li cas cov lus teb raug rau cov lus nug yog lub cim C.
Graphite raws li Allotrope ntawm Carbon
Cov pa roj carbon monoxide muaj nyob rau hauv ntau hom qauv nrog ntau yam khoom sib txawv. Pob zeb diamond muaj peb -sib nqus network ntawm tetrahedral bonds thiab yog ib qho hluav taws xob insulator. Fullerenes, nanotubes thiab graphene yog lwm yam kev npaj ntawm tib lub caij. Graphite yog daim ntawv thermodynamically ruaj khov nyob rau hauv cov xwm txheej zoo tib yam, thiab nws yog daim ntawv siv rau electrodes vim tias nws sib txuas cov hluav taws xob hluav taws xob zoo nrog qhov tshwj xeeb thermal stability. Tag nrho cov ntaub ntawv no qhia tib cov qauv C, thiab tsuas yog kev npaj ntawm atoms txawv.
Bonding thiab Layer Structure
Nyob rau hauv graphite txhua carbon atom tsim peb sigma daim ntawv cog lus rau peb cov neeg nyob ze nyob rau hauv ib tug ca hexagonal daim ntawv, nrog rau plaub electron delocalised tshaj tag nrho cov txheej. Lub hauv - dav hlau carbon- carbon daim ntawv cog lus ntev yog hais txog 142 picometres, thiab cov khaubncaws sab nraud povtseg yog sib cais los ntawm 335 picometres thiab tuav ua ke los ntawm cov tsis muaj zog van der Waals. Cov txheej txheej txheej no piav qhia txog cov khoom tseem ceeb hauv lub qhov cub: cov khoom siv hluav taws xob txav tau yooj yim hauv ib txheej, yog li cov khoom siv, thiab cov khaubncaws sab nraud povtseg thiab cais tau yooj yim, uas yog vim li cas graphite yog mos thiab yooj yim rau tshuab. Nws kuj piav qhia tias vim li cas cov khoom ntawm electrode yog ntsuas thaum uas tig mus thiab perpendicular mus rau extrusion kev taw qhia.
Purity ntawm Industrial Electrode
Kev lag luam graphite electrode muaj ntau dua 99 feem pua ntawm tag nrho cov pa roj carbon tom qab graphitisation. Cov seem yog tshauv, uas yog los ntawm cov ntxhia hauv cov coke thiab pitch, thiab ib qho me me ntawm leej faj. Cov qib hluav taws xob tsis tu ncua feem ntau tso cov tshauv nyob ib ncig ntawm ib nrab ib feem pua, thaum ultra- siab- qib fais fab tau tuav kom qis qis vim tias cov tshauv- tsim cov khoom tuaj yeem nkag mus rau hauv cov hlau da dej. Sulfur kuj tseem khaws cia qis, feem ntau qis dua 0.05 feem pua, txij li cov sulfur pick- yog qhov tsis xav tau hauv cov qib steel feem ntau. Cov ntsiab lus noo noo yog tsawg thiab tswj los ntawm kev xyaum khaws cia.
Yog vim li cas tus qauv tseem ceeb hauv kev xyaum
Lub hauv paus purity tom qab tus qauv C muaj qhov cuam tshuam ncaj qha rau kev lag luam. Cov hmoov tshauv xws li hlau, silicon, aluminium thiab calcium tuaj yeem tsim cov khoom sib xyaw hauv cov hlau lossis siv lub zog hauv qhov cub, yog li qis - tshauv electrode tiv thaiv steel zoo. Cov ntsiab lus tsis tshua muaj leej faj ua rau cov electrode haum rau cov qib steel tseem ceeb. Vim tias cov chemistry yooj yim, qhov sib txawv ntawm cov electrodes yog los ntawm cov qauv thiab kev ua haujlwm: qhov loj thiab kev taw qhia ntawm cov coke hais, qhov ntom ntom tau ua tiav thaum ci thiab impregnation, thiab graphitisation kub.
Cov lus nug nquag
Q: Dab tsi yog cov tshuaj formula ntawm graphite electrode?
Nws yog C, lub cim ntawm elemental carbon. Cov electrode yog tsim graphite, tsis yog ib qho compound, yog li tsis muaj molecular mis siv rau tag nrho lub cev.
Q: Puas yog graphite electrode yog cov khoom ntshiab?
Nws yog ntau tshaj 99 feem pua carbon los ntawm huab hwm coj. Cov hmoov tshauv me me - tsim cov ntxhia thiab sulfur nyob, thiab lawv cov qib raug tswj raws li qib electrode.
Q: Vim li cas graphite ua hluav taws xob yog tias nws yog cov pa roj carbon ntshiab?
Txhua cov pa roj carbon atom nyob rau hauv ib txheej pab txhawb ib qho hluav taws xob delocalised, yog li cov nqi txav mus rau hauv cov nplooj ntawv hexagonal. Qhov no yog cov cuab yeej ntawm cov qauv, tsis yog ib qho ntxiv.
Q: Dab tsi yog daim ntawv cog lus ntev thiab txheej txheej hauv graphite?
Qhov nyob rau hauv - dav hlau carbon - carbon daim ntawv cog lus ntev yog hais txog 142 picometres thiab qhov sib nrug ntawm cov khaubncaws sab nraud povtseg yog li 335 picometres, nrog rau cov khaubncaws sab nraud povtseg tuav los ntawm tsis muaj zog van der Waals rog.
Q: Ntau npaum li cas cov tshauv tso cai rau hauv ib qho electrode?
Cov qib hluav taws xob tsis tu ncua feem ntau tso cai nyob ib puag ncig 0.5 feem pua tsawg, thaum lub zog siab thiab ultra- siab- qib fais fab tau teev nyob rau theem qis los tiv thaiv kev huv ntawm steel.
Q: Puas yog cov qauv sib txawv ntawm RP, HP thiab UHP electrodes?
Tsis yog. Tag nrho peb yog carbon. Lawv txawv nyob rau hauv raw cov ntaub ntawv, ceev, resistivity, thermal expansion thiab tshauv theem es tsis yog nyob rau hauv tshuaj formula.