Lẹẹdi jẹ ẹya allotrope ti erogba, a iyipada gara laarin atomiki kirisita, irin kirisita ati molikula kirisita.Generally grẹy dudu, asọ sojurigindin, greasy feeling.Enhanced ooru ni air tabi atẹgun ti Burns ati ki o gbe erogba oloro.Strong oxidizing òjíṣẹ yoo oxidize o sinu Organic acids.Used as antiwear agent and lubricating material, making crucible, electrode, dry battery, pencil lead.The scope of graphite erin: adayeba graphite, ipon crystalline graphite, flake graphite, cryptocrystalline graphite, graphite powder, graphite paper, expanded graphite, lẹẹdi emulsion, ti fẹ lẹẹdi, amo lẹẹdi ati conductive lẹẹdi lulú, ati be be lo.
1. giga otutu resistance: awọn yo ojuami ti lẹẹdi ni 3850 ± 50 ℃, paapaa lẹhin olekenka-ga otutu arc sisun, awọn àdánù làìpẹ jẹ gidigidi kekere, thermal imugboroosi olùsọdipúpọ jẹ gidigidi small.The agbara ti graphite posi pẹlu awọn ilosoke ti otutu . Ni 2000 ℃, agbara ti lẹẹdi ilọpo meji.
2. conductive, thermal conductivity: iṣiṣẹ ti graphite jẹ ọgọrun igba ti o ga ju awọn ohun elo ti kii-ti-metallic gbogbogbo lọ.The thermal conductivity of steel, iron, lead and other irin materials.Thermal conductivity n dinku pẹlu ilosoke ti iwọn otutu, paapaa ni pupọ. iwọn otutu giga, graphite sinu idabobo;
3. lubricity: iṣẹ lubrication ti graphite da lori iwọn ti flake graphite, flake, olùsọdipúpọ edekoyede jẹ kere, iṣẹ lubrication dara julọ;
4. Iduroṣinṣin kemikali: graphite ni iwọn otutu yara ni iduroṣinṣin kemikali ti o dara, resistance acid, resistance alkali and Organic epo resistance resistance;
5. ṣiṣu: graphite toughness jẹ dara, le ti wa ni itemole sinu kan tinrin dì;
6. resistance mọnamọna gbona: graphite ni iwọn otutu yara nigba lilo le ṣe idiwọ awọn ayipada nla ni iwọn otutu laisi ibajẹ, iyipada iwọn otutu, iwọn didun graphite yipada diẹ, kii yoo kiraki.
1. igbekale tiwqn: erogba ti o wa titi, ọrinrin, awọn impurities, bbl;
2. Idanwo iṣẹ ṣiṣe ti ara: lile, eeru, viscosity, fineness, iwọn patiku, iyipada, walẹ pato, agbegbe dada kan pato, aaye yo, ati bẹbẹ lọ.
3. Idanwo awọn ohun-ini ẹrọ: agbara fifẹ, brittleness, idanwo atunse, idanwo fifẹ;
4. Idanwo iṣẹ ṣiṣe kemikali: resistance omi, agbara, acid ati resistance alkali, resistance corrosion, resistance oju ojo, resistance ooru, bbl
5. Awọn ohun elo idanwo miiran: itanna eletiriki, imudara igbona, lubrication, iduroṣinṣin kemikali, resistance mọnamọna gbona