Monga zatsopano zinchito mpweya, kukodzedwa graphite (EG) ndi lotayirira ndi porous nyongolotsi ngati zinthu zopezedwa masoka graphite flakes kudzera intercalation, kuchapa, kuyanika ndi mkulu-kutentha kwambiri.Kuphatikiza pa zinthu zabwino kwambiri za graphite zachilengedwe monga kukana kuzizira ndi kutentha, kukana kwa dzimbiri komanso kudzipaka mafuta, EG ilinso ndi mawonekedwe a kufewa, kulimba mtima, kutsatsa, kugwirizanitsa zachilengedwe ndi chilengedwe, kuyanjana kwachilengedwe ndi kukana kwa radiation komwe graphite yachilengedwe sichimatero. kukhala.Kumayambiriro kwa zaka za m'ma 1860, Brodie adapeza graphite yowonjezereka potenthetsa graphite yachilengedwe ndi mankhwala opangira mankhwala monga sulfuric acid ndi nitric acid.Komabe, ntchito yake inayamba patapita zaka zana.Kuyambira nthawi imeneyo, mayiko ambiri achita motsatizana kafukufuku ndi chitukuko cha graphite yowonjezera ndipo apanga zopambana zazikulu za sayansi.

Kuwonjezedwa kwa graphite kumatha kukulitsa nthawi yomweyo 150 ~ 300 mu voliyumu pa kutentha kwakukulu, ndikusintha kuchoka ku vermicular kupita ku vermicular, zomwe zimapangitsa kuti pakhale mawonekedwe otayirira, opindika komanso opindika, okulirapo pamtunda, kukhathamiritsa kwamphamvu padziko lapansi, kukhathamiritsa kwa flake graphite, ndi kudzikonda pakati pawo. vermicular graphite, yomwe imawonjezera kusinthasintha kwake, kulimba mtima ndi pulasitiki.
Mayendedwe angapo akutukuka kwa graphite yowonjezera ndi awa:

1. graphite yowonjezera pazifukwa zapadera
Zoyeserera zikuwonetsa kuti nyongolotsi za graphite zimagwira ntchito yotengera mafunde a electromagnetic, zomwe zimapangitsa kuti ma graphite okulirapo azikhala ndi ntchito yayikulu pankhondo.Asilikali aku US komanso asitikali athu achita kafukufuku woyeserera m'derali.The kukod graphite ayenera kukwaniritsa zofunika izi: (1) otsika koyamba kukula kutentha ndi lalikulu kukula voliyumu;(2) Katundu wamankhwala ndi wokhazikika, ndipo kuchuluka kwa kukulitsa sikuwola pakatha zaka 5 zosungidwa;(3) Pamwamba pa graphite yokulirapo ndi yopanda ndale ndipo ilibe dzimbiri ku cartridge case.

2. Granular anakulitsa graphite
Small-tinthu kukodzedwa graphite makamaka amatanthauza 300 cholinga expandable graphite ndi kukula buku la 100ml/g.Izi zimagwiritsidwa ntchito kwambiri popaka zotchingira moto, ndipo kufunikira kwake ndi kwakukulu.

3. graphite yowonjezedwa yokhala ndi kutentha kwakukulu koyambira kokulirapo
Kutentha koyambirira kwa graphite komwe kumakulitsidwa ndi kutentha kwakukulu koyambirira ndi 290-300 ℃, ndipo voliyumu yowonjezera ndi ≥ 230ml/g.Mtundu uwu wa graphite wokulitsidwa umagwiritsidwa ntchito makamaka pakuchepetsa moto kwa mapulasitiki aukadaulo ndi mphira.Izi zidapangidwa bwino ndi Hebei Agricultural University ndikufunsira patent yadziko lonse.

4. Pamwamba kusinthidwa graphite
Pamene kukodzedwa graphite ntchito ngati zakuthupi-retardant lawi, kumaphatikizapo kusungunuka kwa graphite ndi zigawo zina.Chifukwa cha kuchuluka kwa mineralization pamwamba pa graphite, si lipophilic kapena hydrophilic.Choncho, m'pofunika kusintha pamwamba pa graphite kuthetsa vuto la kugwirizana pakati pa graphite ndi zigawo zina.Anthu ena akufuna kuyeretsa pamwamba pa graphite, ndiko kuti, kuphimba pamwamba pa graphite ndi filimu yolimba yoyera.Ili ndi vuto lovuta kulithetsa.Zimaphatikizapo chemistry ya membrane kapena chemistry ya pamwamba, yomwe imatha kupezeka mu labotale.Pali zovuta m'mafakitale.Mtundu uwu wa white expandable graphite umagwiritsidwa ntchito makamaka ngati ❖ kuyanika koletsa moto.

5. Kutentha kochepa koyambirira kokulirapo ndi kutentha kochepa kumakulitsa graphite
Mtundu uwu wa graphite wowonjezera umayamba kukula pa 80-150 ℃, ndipo voliyumu yake yowonjezera imafika 250ml/g pa 600 ℃.Zovuta pokonzekera msonkhano wowonjezereka wa graphite mkhalidwewu uli mu: (1) kusankha wothandizila woyenerera;(2) Kuwongolera ndikuwongolera mikhalidwe yowumitsa;(3) Kutsimikiza kwa chinyezi;(4) Njira yothetsera mavuto oteteza chilengedwe.Pakali pano, kukonzekera otsika kutentha expandable graphite akadali mu experimental siteji.