Graphite crucible feem ntau yog siv los tsim cov hlau thiab cov khoom siv semiconductor. Txhawm rau ua kom cov hlau thiab cov khoom siv semiconductor ncav cuag qee yam purity thiab txo cov impurities, graphite hmoov nrog cov ntsiab lus siab carbon thiab tsawg impurities yuav tsum tau. Lub sijhawm no, nws yog qhov tsim nyog los tshem tawm impurities los ntawm graphite hmoov thaum ua. Ntau tus neeg muas zaub tsis paub yuav ua li cas nrog cov impurities hauv graphite hmoov. Niaj hnub no, Furuite Graphite Editor yuav tham txog cov lus qhia kom tshem tawm impurities hauv graphite hmoov kom ntxaws:
Thaum tsim cov graphite hmoov, peb yuav tsum nruj me ntsis tswj cov ntsiab lus ntawm impurities los ntawm kev xaiv cov ntaub ntawv raw, xaiv raw cov ntaub ntawv uas muaj cov hmoov tshauv tsawg, thiab tiv thaiv kom tsis txhob muaj impurities nyob rau hauv cov txheej txheem ntawm graphite hmoov. Cov oxides ntawm ntau yam impurity yog tas li decomposed thiab evaporated ntawm qhov kub thiab txias, yog li xyuas kom meej lub purity ntawm cov graphite hmoov.
Thaum tsim cov khoom lag luam graphitized, lub qhov cub kub kub nce mus txog 2300 ℃ thiab cov ntsiab lus tsis huv yog li ntawm 0.1% -0.3%. Yog hais tias lub cub tawg kub yog nce mus rau 2500-3000 ℃, cov ntsiab lus ntawm residual impurities yuav txo tau zoo heev. Thaum tsim cov khoom siv graphite hmoov, roj av coke nrog cov hmoov tshauv tsawg feem ntau yog siv los ua cov khoom siv tiv thaiv thiab cov khoom siv rwb thaiv tsev.
Txawm hais tias qhov kub ntawm graphitization tsuas yog nce mus rau 2800 ℃, qee qhov impurities tseem nyuaj rau tshem tawm. Qee lub tuam txhab siv txoj hauv kev xws li shrinking rauv cores thiab nce qhov ceev tam sim no kom rho tawm graphite hmoov, uas txo cov zis ntawm graphite hmoov rauv thiab ua kom lub zog noj. Yog li ntawd, thaum qhov kub ntawm graphite hmoov rauv mus txog 1800 ℃, purified gas, xws li chlorine, freon thiab lwm yam chlorides thiab fluorides, yog qhia, thiab nws tseem ntxiv rau ob peb teev tom qab lub hwj chim tsis ua hauj lwm. Qhov no yog los tiv thaiv cov vaporized impurities los ntawm diffusing mus rau hauv lub cub tawg nyob rau hauv lub opposite kev taw qhia, thiab kom tshem tawm cov seem purified gas los ntawm lub pores ntawm graphite hmoov los ntawm kev qhia ib co nitrogen.
Post lub sij hawm: Jan-06-2023