Ikoranabuhanga rya "catalytic graphitization" ni iki?

Gukoresha ikoranabuhanga rya "catalytic grafitization" ni ikoranabuhanga, mu gihe cyo gutegura ibikoresho bya karuboni, rikoresha "catalysts" zihariye (nk'icyuma, ferrosilicon, boron, nibindi) kugira ngo byorohereze guhindura karuboni idafite ibara ry'umukara mu buryo bwa "grafiti" ku bushyuhe buke.

Ihame rya tekiniki

Ishingiro rya catalytic graphitization riri mu gukoresha catalysts kugira ngo bigabanye ingufu zo gukora za graphitization reaction, bityo bikihutisha ihinduka rya atome za karuboni ziva mu buryo butanoze zijya mu buryo bwa graphite. Uburyo bw'ibanze burimo inyigisho ebyiri:

Uburyo bwo gusenya no kugwa kw'imvura:

Karuboni idafite imvange ishongeshwa mu mvange ishongeshejwe ikorwa na catalyst. Iyo ishongeshejwe igeze ku rugero rwo hejuru, atome za karuboni zisohoka mu buryo bwa kristu za grafiti.
Urugero, katalyst ya ferrosilicon ishobora gushonga kugeza kuri 2% bya karuboni kuri 1600°C, bigatuma karuboni yihuta cyane nk'iy'igrafiti. Mu gihe kimwe, ikorwa ry'imiterere ya karuboni ya silicone ifite impande esheshatu rifasha mu ikorwa rya karuboni.

Uburyo bwo Gutunganya Karuboni no Kuziba Ingano:

Karuboni ikorana na karuboni, ikora karubide, ibora ikaba girafiti n'umwuka w'icyuma iyo ubushyuhe bwinshi bukabije.
Urugero, icyuma gihuza na karuboni kugira ngo kivugurure icyuma na monoxide ya karuboni. Hanyuma icyuma gihuza na karuboni kugira ngo kivemo karuboni y'icyuma, amaherezo kikabora kikavamo karuboni n'icyuma byoroshye gukoresha.

Ubwoko bwa Catalyst n'ingaruka zayo

Ferrosilicon Catalyst:

• Igipimo cyiza cya silikoni ni 25%, bishobora kugabanya ubushyuhe bwa grafitisation kuva kuri 2500-3000°C kugeza kuri 1500°C.
• Ingano y'uduce twa ferrosilicon igira ingaruka ku ngaruka za catalytic: iyo ingano y'uduce igabanutse kuva kuri 75 μm ikagera kuri 50 μm, ubushobozi bwo guhangana n'amashanyarazi buragabanuka. Ariko, uduce duto cyane (<50 μm) dushobora gutuma habaho kwiyongera kwa resistivity.

Boron Catalyst:

• Bishobora kugabanya ubushyuhe bwa graphitization bukagera munsi ya 2200°C no kongera icyerekezo cy'imigozi ya karuboni.
• Urugero, kongeramo aside boric 0.25% kuri filime ya graphene ya oxidized no kuyitunganya ubushyuhe kuri 2000°C byongera amashanyarazi ku kigero cya 47% naho graphitization yongereho 80%.

Igikatarishi cy'icyuma:

• Ubutare bufite aho bushongesha 1535°C. Iyo silicon yongewemo, aho bushongesha hamanuka kugera kuri 1250°C, kandi igikorwa cyo gukurura gitangira kuri ubu bushyuhe.
• Ubushyuhe bw'icyuma buva mu mwuka kuri 2000°C, mu gihe silicon iva mu mwuka uri hejuru ya 2240°C, nta bisigazwa bisigaye mu musaruro wa nyuma.

Ibyiza bya tekiniki

Kuzigama Ingufu:

Gukoresha graphitization gakondo bisaba ubushyuhe buri hejuru ya 2000-3000°C, mu gihe gukoresha graphitization ya catalytic bishobora kugabanya ubushyuhe bukagera kuri 1500°C, bigatuma ingufu zigabanuka cyane.

Igabanuka ry'umusaruro:

Igikorwa cya "catalytic" cyihutisha ivugurura rya atome za karuboni, bigabanya igihe cyo gukoresha graphitization.

Imikorere myiza y'ibikoresho:

Gukoresha ikoranabuhanga rya "catalytic graphitization" bishobora gusana inenge mu miterere no kongera urugero rwa "graphitization", bityo bikanoza imikorere y'amashanyarazi, imikorere y'ubushyuhe, n'imbaraga za mekanike.

• Urugero, graphitization ya boron-catalyzed ikora filime za graphene zifite amashanyarazi ya 3400 S/cm, zikoreshwa mu bikoresho by'ikoranabuhanga byoroshye no mu kurinda amashanyarazi.

Ahantu ho Gukoresha Serivisi

Ibikoresho bya Electrode:

Electrode za grafiti zikozwe binyuze mu gupima amashanyarazi zigaragaza amashanyarazi menshi kandi zirwanya ubushyuhe, bigatuma zikoreshwa mu nganda nka metallurgie na electrochimie.

Ibikoresho byo kubika ingufu:

Ibikoresho bya karuboni byakoreshejwe mu gushushanya bikoreshwa nk'ibice binini bya anode muri bateri za lithiamu/sodium, bikongera ubushobozi bwihariye bwo gusohora umuriro no guhagarara neza kw'uruziga.

Ibikoresho bigize imvange:

Ikoranabuhanga rya "catalytic graphitization" rishobora gukora ibikoresho bivanze na karuboni/karuboni bikora neza cyane kugira ngo bikoreshwe mu by’indege, mu nganda zikora imodoka, n’ahandi.

Imbogamizi za tekiniki

Guhitamo no kunoza Catalyst:

Kataloji zitandukanye zigaragaza ingaruka zitandukanye cyane zo gukamura, bikaba ngombwa guhitamo kataloji zikwiye hashingiwe ku bwoko bw'ibikoresho n'imiterere y'imikorere.

Ibibazo by'ibisigazwa bya Catalyst:

Hari ibintu bimwe na bimwe bishongesha (nk'abanadium) bifite aho bishongesha cyane kandi biragoye kubikuraho burundu nyuma yo gukoresha graphitization, bishobora kugira ingaruka ku isuku y'ibikoresho.

Kugenzura Imikorere:

Gutunganya imiterere y’ibishushanyo mbonera (catalytic graphitization) bireba ibipimo nk’ubushyuhe, ikirere, n’igihe, bigasaba kugenzura neza kugira ngo hirindwe gukwirakwiza imiterere y’ibishushanyo mbonera birenze urugero cyangwa gukwirakwiza imiterere y’ibishushanyo mbonera bidahagije.