Kev taw qhia txog kev lag luam synthesis thiab kev siv cov graphite nthuav dav

Expanded graphite, tseem hu ua vermicular graphite, yog crystalline compound uas siv lub cev los yog tshuaj txoj kev los intercalate non-carbon reactants rau hauv naturally-scaled graphitic intercalated nanocarbon cov ntaub ntawv thiab ua ke nrog carbon hexagonal network dav hlau thaum tuav Graphite txheej txheej. Nws tsis tsuas yog tuav lub cev thiab tshuaj lom neeg zoo ntawm graphite, xws li kub tsis kam, corrosion kuj, neutron flux, X-ray thiab gamma-ray ntev irradiation. Nws kuj muaj cov khoom zoo ntawm lub cev thiab tshuaj lom neeg, xws li kev sib txhuam coefficient qis, zoo rau nws tus kheej lubrication, hluav taws xob thiab thermal conductivity, thiab anisotropy. Ntxiv mus, vim muaj kev sib cuam tshuam ntawm cov khoom siv sib txuas thiab cov graphite txheej, nthuav cov graphite nthuav tawm cov khoom tshiab uas cov graphite pristine thiab cov khoom sib txuas tsis muaj, thiab kov yeej cov brittleness thiab kev cuam tshuam ntawm ntuj graphite. Cov nram qab no Furuite graphite editors qhia cov kev taw qhia txog kev lag luam synthesis thiab kev siv ntawm nthuav graphite:

1. Cov txheej txheem hluavtaws feem ntau siv hauv kev lag luam

① Tshuaj oxidation

Qhov zoo: Cov tshuaj oxidation yog siv dav thiab tsim kom zoo hauv kev lag luam. Yog li ntawd, nws muaj qhov pom tseeb zoo, paub tab technology thiab tus nqi qis.

Disadvantage: Tus neeg sawv cev intercalating feem ntau yog cov concentrated sulfuric acid, uas siv cov kua qaub ntau. Muaj Sox cov pa phem phem hauv cov txheej txheem tsim khoom, thiab cov khoom seem hauv cov khoom kuj corrode cov khoom siv hluavtaws.

② Electrochemical oxidation

Zoo li cov tshuaj oxidation, nws yog ib qho ntawm cov kev lag luam synthesis rau nthuav graphite.

Qhov zoo: Tsis tas yuav ntxiv cov oxidants muaj zog, xws li cov kua qaub muaj zog, thiab cov tshuaj tiv thaiv tuaj yeem tswj tau los ntawm kev kho qhov tsis xws li tam sim no thiab voltage. Cov khoom siv synthesis yog qhov yooj yim, cov synthesis yog loj, cov electrolyte tsis muaj kuab paug, thiab tuaj yeem rov qab siv dua.

Qhov tsis zoo: Kev ruaj ntseg ntawm cov khoom sib txuas yog qhov tsis zoo dua li lwm txoj hauv kev, uas yuav tsum tau siv cov khoom siv siab dua, thiab muaj ntau yam cuam tshuam rau qhov zoo ntawm cov khoom. Qee zaum, qhov nthuav dav ntawm cov khoom raug txo qis heev vim qhov nce hauv qhov kub thiab txias. Tsis tas li ntawd, muaj kev cuam tshuam sab ntawm cov dej ntws siab hauv cov kev daws teeb meem aqueous, yog li nws yog qhov nyuaj kom tau txais cov khoom sib txuas ua ntej.

2. Cov tuam txhab tsim khoom tseem ceeb thiab muaj peev xwm ntau lawm

Kev tsim cov khoom lag luam graphite nthuav dav hauv kuv lub teb chaws tau loj hlob los ntawm thawj theem mus rau ntau tshaj 100 lub tuam txhab, nrog rau cov khoom tsim tawm txhua xyoo txog 30,000 tons, thiab kev lag luam concentration tsawg. Tsis tas li ntawd, feem ntau cov tuam txhab lag luam feem ntau yog cov khoom siv qis kawg nkaus, tsis tshua muaj siv nyob rau hauv tsheb ntsaws ruaj ruaj thiab nuclear aviation teeb. Txawm li cas los xij, nrog kev txhim kho ntawm cov cuab yeej siv hauv tsev, qhov feem ntawm cov khoom siv high-end yuav maj mam nce.

3. Kev lag luam xav tau thiab kev kwv yees ntawm cov khoom sib khi

Tam sim no, nthuav graphite feem ntau yog siv los ua cov khoom siv tsheb sib khi, xws li lub tog raj kheej gaskets, qhov nkag thiab qhov chaw nres nkoj tso pa, thiab lwm yam. Cov khoom siv graphite sealing hauv kuv lub teb chaws feem ntau yog siv los ua sealing fillers. Tam sim no, nthuav graphite nrog cov ntsiab lus qis carbon tau tsim, uas tuaj yeem txo cov nqi tsim tawm ntawm cov graphite nthuav dav, yog li hloov cov asbestos ntawm qhov loj thiab xav tau ntau ntxiv. Ntawm qhov tod tes, yog tias cov ntaub ntawv yas, roj hmab thiab hlau sealing tuaj yeem hloov tau ib nrab, qhov kev thov txhua xyoo rau cov khoom siv graphite sealing yuav ntau dua.

Hauv kev lag luam tsheb, txhua lub tsheb lub tog raj kheej taub hau gasket, cua nkag thiab qhov chaw nres nkoj gasket xav tau txog 2 ~ 10kg ntawm graphite nthuav dav, thiab txhua 10,000 lub tsheb xav tau 20 ~ 100 tons ntawm graphite nthuav. Tuam Tshoj txoj kev lag luam tsheb tau nkag mus rau lub sijhawm ntawm kev loj hlob sai. Yog li ntawd, kuv lub teb chaws txhua xyoo thov rau nthuav graphite sealing cov ntaub ntawv tseem yog lub hom phiaj heev.