Cov qauv ntawm cov cua sov uas tiv taus cov dej noo yog yooj yim, yooj yim siv, yooj yim ua, yog ib hom dej noo uas siv dav tshaj plaws. Tib neeg feem ntau hu ua lub tshuab cua sov lossis lub nkoj nqus dej noo.
Cov khoom siv tiv taus uas siv rau kev ua kom sov yog: kub heev, tiv taus tau, tsis muaj pa dej ntau thaum kub heev, tsis muaj tshuaj lom neeg cuam tshuam nrog cov khoom siv membrane, tsis tsim cov pa tawm thiab ua rau muaj kuab paug. Cov khoom siv tiv taus cua sov xaiv feem ntau yog los ntawm cov hlau refractory, xws li W, Mo, Ta thiab lwm yam khoom siv lossis xaiv cov khoom siv graphite lossis boron nitride uas muaj cov khoom siv hluav taws xob thiab lwm yam khoom siv. Qee zaum, kuj tseem tuaj yeem xaiv Fe, Ni, Ni-Cr alloy thiab Pt ua cov khoom siv evaporation.
Cov khoom siv niaj hnub (xws li Ti, Mo, C, Ta, W, thiab lwm yam) uas muaj ntau yam kev tiv thaiv cua sov, qhov kub thiab txias ntawm cov khoom siv evaporation txawv. Ntawm lawv, tungsten ua brittle thaum cua sov mus rau qhov kub thiab txias evaporation vim yog cov khoom sib txuas cua sov. Molybdenum, ntawm qhov tod tes, sib txawv hauv kev huv, qee qhov ua brittle thiab lwm tus tsis ua. Tungsten reacts nrog dej pa los tsim cov pa oxygen WO3.
Yog li ntawd, thaum tungsten raug cua sov hauv cov dej seem, cov khoom siv cua sov tas li ploj mus. Thaum cov roj seem tsawg, tsis muaj kev poob ntau ntawm cov khoom siv, tab sis nws yog kev ua qias tuaj loj ntawm daim nyias nyias.
Kev siv cov khoom siv filamentary yuav tsum tau ua tib zoo saib xyuas qhov ntub ntawm cov hlau kub ntawm cov khoom siv membrane. Piv txwv li, qhov kub ntawm cov hlau kub nce sai dhau, cov khoom siv membrane tsis yooj yim yaj tag nrho cov khoom siv membrane tam sim ntawd thiab qhov ntub ntawm cov hlau kub tsis txaus. Yog li ntawd, cov zaj duab xis tsis yaj yuav poob tawm ntawm lub pob tawb hlau. Tib lub sijhawm, qhov kub nce sai dhau kuj yuav ua rau cov khoom siv membrane hauv cov pa tawm sai sai, ua rau muaj npuas lossis dej txaws, qhov tshwm sim yuav ua rau cov dej me me lo rau ntawm lub substrate. Yog li ntawd, cov khoom siv filament yuav tsum tau siv nrog kev tswj qhov kub.
Qhov tsis zoo ntawm cov pob tawb hlau, cov kauj conical lossis cov kauj kauv yog tias qhov ntau ntawm cov khoom siv zaj duab xis txhawb nqa me dhau, thiab qhov chaw no yuav ua rau qhov kub ntawm cov hlau kub nce siab thaum qhov ntau ntawm cov khoom siv zaj duab xis txo qis tom qab cov khoom siv zaj duab xis tau evaporated, yog li ua rau tus nqi evaporation nce siab. Qhov no kuj yog ib qho teeb meem uas yuav tsum tau sau tseg rau cov txheej txheem ua zaj duab xis uas xav tau kev tswj hwm nruj ntawm tus nqi evaporation.
(2) Lub hauv paus ntsiab lus ua haujlwm thiab cov qauv zoo li cas thiab siv yam ntxwv
Qhov ua kom sov tsis kam, qhov tseeb, yog lub cua sov tsis kam uas siv lub tshuab hluav taws xob lossis lub nkoj ua kom sov ncaj qha, yog li tam sim no hla ntau tus lej Joule cua sov thiab tau txais qhov kub siab kom yaj cov khoom siv hlau zaj duab xis, yog li nws ua rau nws ua ib hom qhov ua kom tsis kam.
– Tsab xov xwm no yog tso tawm los ntawmlub tshuab nqus tsev txheej tshuab chaw tsim khoomGuangdong Zhenhua
Lub sijhawm tshaj tawm: Lub Ob Hlis-23-2024