Isendlalelo sefilimu emthonjeni wokuhwamuka wokuhwamuka kokushisisa kungenza izinhlayiya zolwelwesi zibe sesimweni sama-athomu (noma ama-molecule) zingene endaweni yesigaba segesi. Ngaphansi kwezinga lokushisa eliphezulu lomthombo wokuhwamuka, ama-athomu noma ama-athomu angaphezulu kolwelwesi athola amandla anele ukuze anqobe ukungezwani okungaphezulu futhi ahwamuke ebusweni. Lawa ma-athomu ahwamukile noma ama-molecule akhona endaweni yegesi endaweni engenalutho, okungukuthi indawo yesigaba segesi. izinto zensimbi noma ezingezona ezensimbi.
Endaweni ye-vacuum, izinqubo zokushisa kanye nokuhwamuka kwezinto ze-membrane zingathuthukiswa. Imvelo yevacuum inciphisa umphumela wokucindezela komkhathi enqubweni yokuhwamuka, okwenza inqubo yokuhwamuka kube lula ukuyenza. Ekucindezelweni komkhathi, izinto ezibonakalayo zidinga ukucindezelwa okukhulu ukuze zinqobe ukumelana negesi, kanti endaweni engenalutho, lokhu kumelana kuncipha kakhulu, okwenza izinto zibe lula ukuhwamuka. Enqubweni yokumboza ukuhwamuka, izinga lokushisa lokuhwamuka kanye nomfutho womhwamuko wempahla yomthombo wokuhwamuka kuyisici esibalulekile ekukhetheni impahla yomthombo wokuhwamuka. Ekwembozweni kwe-Cd (Se, s), izinga lokushisa layo lokuhwamuka livame ukuba ku-1000 ~ 2000 ℃, ngakho-ke udinga ukukhetha impahla yomthombo wokuhwamuka enezinga lokushisa elifanele lokuhwamuka. Njenge-aluminium atmospheric pressure evaporation temperatures engu-2400 ℃, kodwa ezimeni zevacuum, izinga lokushisa layo lokuhwamuka lizokwehla kakhulu. Lokhu kungenxa yokuthi awekho ama-molecule asemkhathini ekuvinjweni kwe-vacuum, ukuze ama-athomu e-aluminium noma ama-molecule angahwamuka kalula ukusuka phezulu. Lesi simo siyinzuzo ebalulekile yokugcoba i-vacuum evaporation. Emkhathini we-vacuum, ukuhwamuka kwezinto zefilimu kuba lula ukwenza, ukuze amafilimu amancane akheke emazingeni okushisa aphansi. Lokhu kushisa okuphansi kunciphisa i-oxidization kanye nokubola kwezinto, ngaleyo ndlela kube nesandla ekulungiseleleni amafilimu ekhwalithi ephezulu.
Ngesikhathi se-vacuum coating, ingcindezi lapho umhwamuko wefilimu ulingana oqinile noma owuketshezi ubizwa ngokuthi i-saturation vapor pressure kulelo zinga lokushisa. Lokhu kucindezela kubonisa ukulingana okuguquguqukayo kokuhwamuka nokufiphala ezingeni lokushisa elinikeziwe. Ngokuvamile, izinga lokushisa kwezinye izingxenye ze-vacuum chamber liphansi kakhulu kunezinga lokushisa lomthombo wokuhwamuka, okwenza kube lula ukuhwamuka kwama-athomu we-membrane noma ama-molecule ukuminyana kwezinye izingxenye zegumbi. Kulesi simo, uma izinga lokuhwamuka likhulu kunezinga lokufingqa, khona-ke ekulinganisweni okuguquguqukayo ukucindezela komhwamuko kuzofinyelela ukucindezela komhwamuko wokugcwala. Okusho ukuthi, kulesi simo, inani lama-athomu noma ama-molecule ahwamukayo lilingana nenani elijiyayo, futhi ukulingana okuguquguqukayo kuyafinyelelwa.
-Le ndatshana ikhishwe nguumenzi womshini we-vacuum coatingI-Guangdong Zhenhua
Isikhathi sokuthumela: Sep-27-2024