Lub raj mis thiab tuaj yeem iav tuaj yeem txiav tawm qhov hluav taws xob ultraviolet, tiv thaiv cov khoom tsis zoo. Piv txwv li, npias raug rau xiav lossis ntsuab teeb nrog lub wavelength tsawg dua 550nm thiab yuav ua rau muaj ntxhiab tsw, uas yog hu ua hnub ci saj. Caw, ntses thiab lwm yam zaub mov tseem yuav cuam tshuam los ntawm lub teeb ultraviolet nrog qhov zoo ntawm tsawg dua 250nm. Cov kws tshawb fawb German tau hais tias pom lub teeb pom kev photochemical maj mam tsis muaj zog los ntawm lub teeb ntsuab mus rau qhov kev taw qhia yoj ntev thiab xaus ntawm txog 520nm. Hauv lwm lo lus, 520nm yog qhov tseem ceeb wavelength, thiab txhua lub teeb luv dua qhov yuav ua rau cov ntsiab lus ntawm lub raj mis raug rhuav tshem. Raws li qhov tshwm sim, tuaj yeem iav yuav tsum nqus lub teeb hauv qab 520nm, thiab lub raj mis xim av ua haujlwm zoo tshaj plaws.
Thaum cov mis nyuj raug rau lub teeb, nws tsim "lub teeb saj" thiab "odor" vim yog tsim ntawm peroxides thiab cov tshuaj tiv thaiv tom qab. Vitamin C thiab ascorbic acid kuj txo qis, zoo li cov vitamins A, Bg thiab D. Cov nyhuv ntawm lub teeb ntawm cov mis nyuj zoo tuaj yeem zam tau yog tias ntxiv ultraviolet absorption rau iav cov khoom, uas muaj cov nyhuv me ntsis ntawm cov xim thiab ci. Rau lub raj mis thiab cov kaus poom uas muaj cov tshuaj, 2 hli tuab iav yuav tsum nqus 98% ntawm lub wavelength ntawm 410nm thiab dhau 72% ntawm lub wavelength ntawm 700nm, uas tuaj yeem tsis tsuas yog tiv thaiv cov nyhuv photochemical, tab sis kuj saib xyuas cov ntsiab lus ntawm lub raj mis.
Dhau li ntawm quartz iav, feem ntau zoo tib yam sodium-calcium-silicon iav tuaj yeem lim feem ntau cov kab hluav taws xob ultraviolet. Sodium-calcium-silicon iav tsis tuaj yeem dhau los ntawm lub teeb ultraviolet (200 ~ 360nm), tab sis tuaj yeem dhau los ntawm lub teeb pom kev (360 ~ 1000nm), uas yog hais tias, cov iav zoo tib yam sodium-calcium-silicon tuaj yeem nqus tau feem ntau ntawm cov hluav taws xob ultraviolet.
Txhawm rau ua kom tau raws li cov neeg siv khoom xav tau kom pom tseeb ntawm lub raj mis iav, nws yog qhov zoo tshaj plaws los ua kom lub raj mis iav tuaj yeem nqus tau cov kab hluav taws xob ultraviolet thiab tsis ua rau nws cov xim tsaus, ntxiv CeO hauv cov ntsiab lus 2 tuaj yeem ua tau raws li qhov yuav tsum tau ua. Cerium tuaj yeem muaj nyob hauv Ce 3+ lossis Ce 4+, ob qho tib si uas tsim muaj zog ultraviolet nqus. Japanese patent qhia txog hom iav muaj pes tsawg leeg uas muaj vanadium oxide 0.01% ~ 1.0%, cerium oxide 0.05% ~ 0.5%. Tom qab ultraviolet irradiation, cov nram qab no tshwm sim: Ce3 + V3 + - Ce4 + V2 +
Nrog rau qhov txuas ntxiv ntawm lub sijhawm irradiation, koob tshuaj ultraviolet tawg tau nce, V2 + piv tau nce, thiab cov iav xim tob zuj zus. Yog hais tias sake raug kev txom nyem ultraviolet irradiation yuav perishable yooj yim, cuam tshuam transparency nrog cov xim iav lub raj mis, tsis yooj yim los soj ntsuam cov ntsiab lus. Txais yuav cov muaj pes tsawg leeg uas ntxiv rau tus neeg CeO 2 thiab V: O:, lub sij hawm tso nyiaj luv luv, raug kev txom nyem ultraviolet irradiation koob kom tsis muaj xim thiab pob tshab thaum me me, tab sis lub sij hawm tso nyiaj ntev, ultraviolet irradiation koob ntau dhau, iav discoloration, dhau qhov tob ntawm discoloration, tuaj yeem txiav txim qhov ntev ntawm lub sijhawm tso nyiaj.
Post lub sij hawm: May-06-2020