Malangizo ochotsera zonyansa kuchokera ku ufa wa graphite

Graphite crucible imagwiritsidwa ntchito popanga zitsulo ndi zida za semiconductor. Pofuna kupanga zitsulo ndi zida za semiconductor kufika pachiyero china ndi kuchepetsa kuchuluka kwa zonyansa, ufa wa graphite wokhala ndi mpweya wambiri wa carbon ndi zosafunika zochepa zimafunika. Panthawi imeneyi, m'pofunika kuchotsa zonyansa kuchokera ku ufa wa graphite panthawi yokonza. Makasitomala ambiri sadziwa momwe angathanirane ndi zonyansa zomwe zili mu ufa wa graphite. Lero, Furuite Graphite Editor ilankhula za malangizo ochotsera zonyansa mu ufa wa graphite mwatsatanetsatane:

Popanga graphite ufa, tiyenera mosamalitsa kulamulira zili zonyansa kuchokera kusankha zipangizo, kusankha zipangizo ndi otsika phulusa okhutira, ndi kupewa kuwonjezeka zosafunika m`kati pokonza graphite ufa. The oxides ambiri zonyansa zinthu nthawi zonse kuwola ndi chamunthuyo pa kutentha kwambiri, motero kuonetsetsa chiyero opangidwa graphite ufa.

Popanga zinthu zambiri za graphitized, kutentha kwa ng'anjo kumafika pafupifupi 2300 ℃ ndipo zotsalira zotsalira zimakhala pafupifupi 0.1% -0.3%. Ngati kutentha kwapakati pa ng'anjo kukwezedwa mpaka 2500-3000 ℃, zomwe zili muzotsalira zotsalira zidzachepetsedwa kwambiri. Popanga zinthu za ufa wa graphite, mafuta a petroleum coke okhala ndi phulusa lochepa nthawi zambiri amagwiritsidwa ntchito ngati zinthu zotsutsa komanso zotchingira.

Ngakhale kutentha kwa graphitization kumangowonjezereka mpaka 2800 ℃, zonyansa zina zimakhala zovuta kuchotsa. Makampani ena amagwiritsa ntchito njira monga kuchepa kwa ng'anjo ya ng'anjo ndikuwonjezera kachulukidwe kakali pano kuti atenge ufa wa graphite, zomwe zimachepetsa kutulutsa kwa ng'anjo ya ufa wa graphite ndikuwonjezera kugwiritsa ntchito mphamvu. Choncho, kutentha kwa ng'anjo ya graphite ufa kufika pa 1800 ℃, mpweya woyeretsedwa, monga chlorine, freon ndi ma chloride ena ndi fluoride, umayambitsidwa, ndipo umapitiriza kuwonjezeredwa kwa maola angapo mphamvu itatha. Izi ndi kuteteza zonyansa vaporized kuti diffusing mu ng'anjo mbali ina, ndi kutulutsa otsala oyeretsedwa mpweya pores wa graphite ufa poyambitsa ena asafe.