Gịnị kpọmkwem ka usoro "graphitization" na-ezo aka?

"Ịmepụta eserese"

"Graphitization" na-ezo aka na usoro ọgwụgwọ okpomọkụ dị elu (nke a na-emekarị na 2000°C ruo 3000°C ma ọ bụ karịa) nke na-agbanwe obere nhazi nke ihe carbonaceous (dịka petroleum coke, coal tar pitch, anthracite coal, wdg) site na ọnọdụ na-adịghị mma ma ọ bụ nke dị ala gaa na nhazi kristal dị larịị yiri graphite eke. Isi ihe dị na usoro a dị na nhazi isi nke atọm carbon, nke na-enye ihe ahụ ihe nwere njirimara anụ ahụ na kemịkalụ pụrụ iche nke graphite.

Usoro na Usoro nke Grafitization Zuru Oke

Usoro Ọgwụgwọ Okpomọkụ

1. Mpaghara Okpomọkụ Dị Ala (<1000°C)
   • Ihe ndị na-agbanwe agbanwe (dịka ọmụmaatụ, mmiri mmiri, obere hydrocarbons) na-agbanwe nwayọ nwayọ, nhazi ahụ na-amalitekwa ịbelata ntakịrị. Agbanyeghị, atọm carbon ka na-anọgide na-agbanwe agbanwe ma ọ bụ na-adị mkpụmkpụ.
2. Mpaghara Okpomọkụ Dị n'etiti (1000–2000°C)
   • Atọm kabọn na-amalite ịhazigharị site na mmegharị okpomọkụ, na-emepụta usoro netwọk hexagonal nke dị n'usoro n'ógbè ahụ (dị ka usoro nhazi nke graphite n'ime-plane). Agbanyeghị, nhazi nke oyi akwa ahụ ka dị mgbagwoju anya.
3. Mpaghara Okpomọkụ Dị Elu (>2000°C)
   • Mgbe e jiri ogologo oge kpughee oke okpomọkụ, oyi akwa carbon na-eji nwayọọ nwayọọ na-ahazi onwe ha, na-emepụta nhazi kristal nke nwere akụkụ atọ (usoro eserese). Ike dị n'etiti oyi akwa na-ebelata (mmekọrịta van der Waals), ebe ike njikọ covalent n'ime ụgbọelu na-abawanye.

Mgbanwe Nhazi Dị Mkpa

• Nhazigharị Atọm Kabọn: Mgbanwe site na nhazi "turbostatic" amorphous gaa na nhazi "layered" nke enyere iwu, ya na atọm kabọn dị n'ime-plane na-emepụta njikọ covalent sp² hybridized na njikọ dị n'etiti oyi akwa site na ike van der Waals.
• Mwepụ nke Mmerụ Ahụ: Okpomọkụ dị elu na-ebelata ntụpọ kristal (dịka ọmụmaatụ, oghere ndị na-adịghị mma, mgbanwe na-adịghị mma), na-eme ka kristal na iguzosi ike n'ezi ihe nke usoro ahụ dịkwuo mma.

Ebumnuche Isi nke eserese

1. Mmeziwanye Ọdụdọ Eletriki
   • Atọm carbon ndị e nyere iwu na-emepụta netwọk na-eduzi ihe, na-eme ka mmegharị elektrọn nwee onwe ha n'ime akwa ma na-ebelata iguzogide nke ukwuu (dịka ọmụmaatụ, coke petroleum graphitized na-egosipụta iguzogide ihe karịrị ugboro iri karịa ihe ndị na-abụghị graphitized).
   • Ngwa: Elektrọd batrị, ahịhịa carbon, ihe ndị dị na ụlọ ọrụ eletriki chọrọ nnukwu conductivity.
2. Mbelata nke Okpomọkụ
   • Nhazi ndị e nyere iwu na-eguzogide oxidation ma ọ bụ ire ere na okpomọkụ dị elu, na-eme ka iguzogide okpomọkụ dịkwuo elu (dịka ọmụmaatụ, ihe ndị e ji eserese mee na-eguzogide ihe karịrị 3000°C na ikuku na-adịghị arụ ọrụ).
   • Ngwa: Ihe ndị na-anaghị emegharị ahụ, ihe ndị na-ekpo ọkụ dị elu, sistemu nchekwa okpomọkụ nke ụgbọ elu.
3. Njirimara Mechanical Kachasị Mma
   • Ọ bụ ezie na nhazi eserese nwere ike ibelata ike zuru oke (dịka ọmụmaatụ, mbelata ike nrụgide), nhazi ahụ a na-etinye n'ime akwa na-ewebata anisotropy, na-eme ka ike dị elu dị n'ime ma na-ebelata mgbawa.
   • Ngwa: Elektrọd graphite, nnukwu katode blocks chọrọ iguzogide okpomọkụ na iguzogide iyi.
4. Mmụba nke Kemịkalụ
   • Nnukwu kristal na-ebelata ebe ndị dị n'elu, na-ebelata ọnụego mmeghachi omume site na oxygen, asịd, ma ọ bụ ntọala, ma na-eme ka iguzogide nchara dịkwuo mma.
   • Ngwa: Igbe kemịkalụ, ihe mkpuchi electrolyzer n'ebe a na-emebi emebi.

Ihe Ndị Na-emetụta Nhazi Grafitization

1. Njirimara Ihe Ndị Dị Mkpa
   • Oke kabọn a na-anaghị agbanwe agbanwe na-eme ka graphitization dịkwuo mfe (dịka ọmụmaatụ, petroleum coke graphitizes dị mfe karịa coal tar pitch).
   • Ihe ndị na-adịghị ọcha (dịka ọmụmaatụ, sọlfọ, nitrogen) na-egbochi nhazi atọm ma chọọ ọgwụgwọ tupu oge eruo (dịka ọmụmaatụ, desulfurization).
2. Ọnọdụ Ọgwụgwọ Okpomọkụ
   • Okpomọkụ: Okpomọkụ dị elu na-eme ka ogo eserese dịkwuo mma mana ọ na-eme ka ọnụ ahịa akụrụngwa na oriri ike dịkwuo elu.
   • Oge: Ogologo oge ijide ihe na-eme ka ihe owuwu zuru oke, mana ogologo oge nwere ike ibute oke mmebi na mmebi arụmọrụ.
   • Ikuku: Gburugburu ebe na-adịghị arụ ọrụ (dịka ọmụmaatụ, argon) ma ọ bụ oghere na-egbochi oxidation ma na-akwalite mmeghachi omume graphitization.
3. Ihe mgbakwunye
   • Ihe ndị na-akpali akpali (dịka ọmụmaatụ, boron, silicon) na-ebelata okpomọkụ graphitization ma melite arụmọrụ (dịka ọmụmaatụ, boron doping na-ebelata okpomọkụ achọrọ site na ~500°C).

Ntụnyere nke ihe ndị e ji eserese mee na ihe ndị na-abụghị eserese

Ikpe Ngwa Bara Uru

1. Electrọd graphite
   • A na-eji kọke mmanụ ma ọ bụ kol tar pitch mee ka elektrọd ndị nwere ike ịrụ ọrụ nke ọma, nke na-adịgide adịgide karịa 3000°C, na-adịgidekwa ike karịa.
2. Anodes Batrị Lithium-Ion
   • Grafite eke ma ọ bụ nke e ji aka mee (nke e ji eserese mee) na-arụ ọrụ dị ka ihe anode, na-eji usoro ya eme ihe maka njikọ/mwepụ lithium-ion ngwa ngwa, na-eme ka arụmọrụ chaja/mwepụ pụta ìhè ka mma.
3. Kabọọza Ịmepụta ígwè
   • Coke mmanụ a kpụrụ akpụ, nke nwere oghere dị warara na nnukwu ọdịnaya carbon, na-eme ka ọdịnaya carbon dị na ígwè a gbazere agbaze dịkwuo ngwa ngwa ma na-ebelata ntinye nke adịghị ọcha sọlfọ.