Chii chinonzi "catalytic graphitization" tekinoroji?

Kugadzira girafiti (catalytic graphitization) tekinoroji iyo, panguva yekugadzirira zvinhu zvekabhoni, inoshandisa zvinhu zvinokonzeresa (zvakaita sesimbi, ferrosilicon, boron, nezvimwewo) kuti zvive nyore kushandura kabhoni isina morphous kuita chimiro chegirafiti patembiricha yakaderera.

Nheyo yeUnyanzvi

Chinangwa chikuru che catalytic graphitization chiri mukushandisa catalysts kuderedza activation energy ye graphitization reaction, nokudaro zvichikurumidzisa kuchinja kwemaatomu ekabhoni kubva pakurongeka kusina kurongeka kuenda kuchimiro che graphite chakarongeka. Maitiro acho anosanganisira dzidziso mbiri:

Nzira yeKunyungudika-Kunaya kwemvura:

Kabhoni isina kunyunguduka inonyunguduka mumusanganiswa wakanyungudutswa unoumbwa ne catalyst. Kana kunyunguduka kwasvika padanho re supersaturated, maatomu ekabhoni anobuda muchimiro chemakristaro egraphite.
Semuenzaniso, chinhu chinobatsira kugadzira ferrosilicon chinogona kunyungudutsa kusvika 2% kabhoni pa1600°C, zvichiita kuti kabhoni iite graphite. Panguva imwe chete, kuumbwa kwezvikamu zve hexagonal silicon carbide kunobatsira pakuumbwa kwegraphite.

Maitiro Ekugadzira Carbide-Kuora:

Chinhu chinokonzeresa chinosangana nekabhoni kuti chigadzire makabhoidhi, ayo anoora kuita graphite nesimbi kana tembiricha yakakwira.
Semuenzaniso, iron oxide inosangana nekabhoni kuti igadzire iron nekabhoni monoxide. Iron inobva yabatana nekabhoni kuti igadzire iron carbide, iyo inozopedzisira yaora kuita kabhoni nesimbi zviri nyore kushandisa.

Mhando dzeCatalyst uye Migumisiro

Ferrosilicon Catalyst: Chinosimudzira

• Zviri mukati mesilicon zvakanaka i25%, izvo zvinogona kuderedza tembiricha yegraphitization kubva pa2500-3000°C kusvika 1500°C.
• Saizi yezvikamu zveferrosilicon inokanganisa catalytic effect: kana saizi yezvikamu ichidzikira kubva pa75 μm kusvika pa50 μm, resistivity yemagetsi inodzikira. Zvisinei, zvikamu zvidiki zvakanyanya (<50 μm) zvinogona kutungamira mukuwedzera kwe resistivity.

Boron Catalyst:

• Inogona kuderedza tembiricha yegraphitization kusvika pasi pe2200°C uye kuwedzera mwero wekutenderera kwefibers dzekabhoni.
• Semuenzaniso, kuwedzera 0.25% boric acid mufirimu regraphene rakasanganiswa uye kuripisa pa2000°C kunowedzera conductivity yemagetsi ne47% uye graphitization degree ne80%.

Chinosimudzira Iron:

• Simbi ine poindi yekunyunguduka ye1535°C. Kana silicon yawedzerwa, poindi yekunyunguduka inodonha kusvika pa1250°C, uye catalytic action inotanga patembiricha iyi.
• Simbi inobuda muchimiro chegasi pa2000°C, nepo silicon ichibuda seutsi huri pamusoro pe2240°C, isingasiyi zvasara muchinhu chekupedzisira.

Zvakanakira zvehunyanzvi

Kuchengetedza Simba:

Kugadzira girafiti yechinyakare kunoda tembiricha yepamusoro ye2000-3000°C, nepo kugadzira girafiti yechinyakare kunogona kuderedza tembiricha kusvika pa1500°C, zvichichengetedza simba zvakanyanya.

Kupfupikiswa Kwekugadzirwa Kwezvinhu:

Chiito cheCatalytic chinokurumidza kurongwazve kwemaatomu ekabhoni, zvichipfupisa nguva yegraphitization.

Kubudirira Kwekushanda Kwezvinhu:

Kugadzira girafiti yemagetsi (catalytic graphitization) kunogona kugadzirisa zvikanganiso zvemuumbi uye kuwedzera mwero wegirafiti, nokudaro kuchivandudza kufambiswa kwemagetsi, kufambiswa kwemafuta, uye simba remuchina.

• Semuenzaniso, graphitization inokonzereswa neboron inogadzira mafirimu egraphene ane conductivity yemagetsi ye3400 S/cm, yakakodzera kushandiswa mumagetsi anochinjika uye kudzivirira kukanganiswa kwemagetsi.

Nzvimbo dzeKushandisa

Zvinhu zveElectrode:

Maelectrode eGraphite akagadzirwa kuburikidza ne catalytic graphitization anoratidza kufambisa kwemagetsi kwakanyanya uye kusapisa, zvichiita kuti akwanise kushandiswa mumaindasitiri akadai se metallurgy uye electrochemistry.

Zvinhu zvekuchengetedza simba:

Zvinhu zvekabhoni zvakagadziriswa zvinoshandiswa seanode mumabhatiri e lithium/sodium, zvichivandudza kugona kwechaja-kuburitsa simba uye kugadzikana kwedenderedzwa.

Zvinhu Zvinosanganiswa:

Tekinoroji yeCatalytic graphitization inogona kugadzira zvinhu zvine carbon/carbon composite zvinoshanda zvakanyanya kuti zvishandiswe mundege, kugadzira mota, nedzimwe nzvimbo.

Matambudziko eUnyanzvi

Kusarudzwa kweCatalyst uye Kugadzirisa:

Ma catalyst akasiyana anoratidza mhedzisiro dzakasiyana-siyana dze catalytic, zvichiita kuti pave nekusarudza ma catalyst akakodzera zvichienderana nerudzi rwezvinhu uye mamiriro ekushanda.

Matambudziko eCatalyst Residue:

Zvimwe zvinhu zvinokonzeresa kunyunguduka (zvakaita sevanadium) zvine poindi dzakawanda dzekunyunguduka uye zvakaoma kubvisa zvachose mushure me graphitization, izvo zvinogona kukanganisa kuchena kwezvinhu.

Kudzora Maitiro:

Kugadziriswa kwegirafiti kunoenderana nezvinodiwa nemuviri zvakaita setembiricha, mhepo, nenguva, zvichida kudzorwa kwakanyatsonaka kudzivirira kuwedzeredzwa kwegirafiti kana kusakwana kwegirafiti.