Kodi ukadaulo wa "catalytic graphitization" ndi chiyani?

Kujambula zithunzi pogwiritsa ntchito njira yopangira zinthu ....

Mfundo Zaukadaulo

Cholinga chachikulu cha catalytic graphitization chili pakugwiritsa ntchito ma catalyst kuti achepetse mphamvu yoyambitsa ya graphitization reaction, motero kufulumizitsa kusintha kwa maatomu a kaboni kuchokera ku dongosolo losokonezeka kupita ku kapangidwe ka graphite kokonzedwa. Njira zake zimaphatikizapo mfundo ziwiri:

Njira Yosungunula ndi Kugwa kwa Mvula:

Mpweya wa amorphous umasungunuka mu chisakanizo chosungunuka chomwe chimapangidwa ndi chothandizira. Pamene kusungunukako kufika pamlingo wodzaza kwambiri, maatomu a kaboni amatuluka mu mawonekedwe a makristasi a graphite.
Mwachitsanzo, chothandizira cha ferrosilicon chimatha kusungunuka mpaka 2% ya kaboni pa kutentha kwa 1600°C, zomwe zimapangitsa kuti kaboni ipangike ngati graphite. Nthawi yomweyo, kupangidwa kwa mapangidwe a hexagonal silicon carbide kumathandiza kupanga graphite.

Njira Yopangira ndi Kuwononga Carbide:

Chothandizirachi chimagwirizana ndi kaboni kuti chipange ma carbide, omwe amawola kukhala graphite ndi nthunzi yachitsulo kutentha kwambiri.
Mwachitsanzo, chitsulo chosakanizidwa chimagwirizana ndi kaboni kuti chipange chitsulo ndi kaboni monoxide. Kenako chitsulocho chimasakanikirana ndi kaboni kuti chipange chitsulo chosungunuka, chomwe pamapeto pake chimawola kukhala kaboni ndi chitsulo chosavuta kujambulidwa.

Mitundu ya Catalyst ndi Zotsatira zake

Chothandizira cha Ferrosilicon:

• Kuchuluka kwa silicon komwe kuli bwino kwambiri ndi 25%, zomwe zimachepetsa kutentha kwa graphitization kuyambira 2500-3000°C mpaka 1500°C.
• Kukula kwa tinthu ta ferrosilicon kumakhudza mphamvu ya catalytic: pamene kukula kwa tinthu tating'onoting'ono kumachepa kuchoka pa 75 μm kufika pa 50 μm, mphamvu yamagetsi imachepa. Komabe, tinthu tating'ono kwambiri (<50 μm) tingayambitse kuwonjezereka kwa mphamvu ya resistivity.

Chothandizira cha Boron:

• Ikhoza kuchepetsa kutentha kwa graphitization kufika pansi pa 2200°C ndikuwonjezera mulingo wa ulusi wa kaboni.
• Mwachitsanzo, kuwonjezera 0.25% ya boric acid ku filimu ya graphene yosungunuka ndikuyitenthetsa pa 2000°C kumawonjezera mphamvu yamagetsi ndi 47% ndipo digiri ya graphitization ndi 80%.

Chothandizira cha Iron:

• Chitsulo chimakhala ndi malo osungunuka a 1535°C. Silikoni ikawonjezedwa, malo osungunuka amatsika kufika pafupifupi 1250°C, ndipo mphamvu yoyambitsa imayamba kutentha kumeneku.
• Chitsulo chimatuluka mu mpweya pa kutentha kwa 2000°C, pomwe silicon imatuluka ngati nthunzi pamwamba pa 2240°C, osasiya zotsalira mu chinthu chomaliza.

Ubwino Waukadaulo

Kusunga Mphamvu:

Kujambula zithunzi mwachizolowezi kumafuna kutentha kwakukulu kwa 2000-3000°C, pomwe kujambula zithunzi pogwiritsa ntchito njira yothandiza kumatha kuchepetsa kutentha kufika pafupifupi 1500°C, zomwe zimapulumutsa mphamvu kwambiri.

Kufupikitsidwa kwa Nthawi Yopangira:

Kuchita bwino kwa catalytic kumathandizira kukonzanso maatomu a kaboni, kufupikitsa nthawi ya graphitization.

Kugwira Ntchito Kwambiri kwa Zinthu:

Kujambula zithunzi pogwiritsa ntchito njira ya catalytic kumatha kukonza zolakwika m'mapangidwe a zinthu ndikuwonjezera kuchuluka kwa graphitization, motero kumawonjezera mphamvu zamagetsi, kutentha, komanso mphamvu ya makina.

• Mwachitsanzo, graphitization yothandizidwa ndi boron imapanga mafilimu a graphene okhala ndi mphamvu zamagetsi ya 3400 S/cm, yoyenera kugwiritsidwa ntchito mu zamagetsi osinthasintha komanso zotchingira kusokoneza kwa maginito.

Madera Ogwiritsira Ntchito

Zipangizo za Electrode:

Ma electrode a graphite okonzedwa kudzera mu catalytic graphitization amawonetsa mphamvu zamagetsi zambiri komanso kukana kutentha, zomwe zimapangitsa kuti akhale oyenera mafakitale monga metallurgy ndi electrochemistry.

Zipangizo Zosungira Mphamvu:

Zipangizo za kaboni zojambulidwa zimagwiritsidwa ntchito ngati ma anode m'mabatire a lithiamu/sodium, zomwe zimapangitsa kuti mphamvu yamagetsi ndi kutulutsa mphamvu zikhazikike komanso kuti kayendedwe kake kakhale kolimba.

Zipangizo Zopangira:

Ukadaulo wa graphitization wa catalytic ukhoza kupanga zinthu zopangidwa ndi carbon/carbon composite zomwe zimagwiritsidwa ntchito kwambiri mu ndege, kupanga magalimoto, ndi zina.

Mavuto aukadaulo

Kusankha ndi Kukonza Zothandizira:

Ma catalyst osiyanasiyana amakhala ndi zotsatira zosiyanasiyana zoyambitsa, zomwe zimapangitsa kuti pakhale kusankha kwa ma catalyst oyenera kutengera mtundu wa zinthu ndi momwe zinthu zilili.

Mavuto a Zotsalira za Catalyst:

Ma catalyst ena (monga vanadium) ali ndi malo osungunuka kwambiri ndipo ndi ovuta kuwachotsa kwathunthu pambuyo pa graphitization, zomwe zingakhudze kuyera kwa zinthu.

Kuwongolera Njira:

Kujambula zithunzi pogwiritsa ntchito njira yolumikizirana (catalytic graphitization) kumakhudza kwambiri zinthu monga kutentha, mlengalenga, ndi nthawi, zomwe zimafuna kulamulira kolondola kuti tipewe kujambulidwa mopitirira muyeso kapena kujambulidwa kosakwanira.