Yuav Ua Li Cas Xaiv Titanium Dioxide rau Cov Tshuaj Txhuam Hniav
Cov tshuaj pleev ib ce qib titanium dioxide tau muab faib ua cov roj thiab dej raws li titanium dioxide. titanium dioxide yog siv dav hauv cov tshuaj pleev ib ce rau nws cov tshuaj pleev ib ce kom zoo nkauj vim nws cov tshuaj ruaj khov, siab refractive index, siab opacity, siab zais hwj chim, zoo whiteness thiab tsis muaj tshuaj lom.
Tsis tsuas yog titanium dioxide yog ib qho zoo tshaj plaws tshuaj pleev ib ce, nws kuj muaj ib tug siab refractive index, photoactivity thiab zoo UV tsis kam, yog li titanium dioxide kuj tau pib siv los ua tshuaj pleev thaiv hnub tshiab hauv tshuaj pleev ib ce. Rau cov tuam txhab tshuaj pleev ib ce, nws yog ib qho tseem ceeb uas yuav tau xaiv cov khoom siv raw nrog cov khoom zoo dua vim tias muaj ntau hom titanium dioxide crystals, qhov loj me thiab kev npaj. Xaiv cov tshuaj pleev thaiv hnub kab tshuaj pleev ib ce nrog titanium dioxide yuav tsum tau them sai sai rau ob lub ntsiab lus hauv qab no.
Ua ntej, kev xaiv ntawm titanium dioxide crystalline
Daim ntawv crystalline ntawm titanium dioxide feem ntau yog rutile thiab anatase, yav tas los tau los ntawm calcination tom kawg, yog li rutile titanium dioxide lattice qauv yog zoo meej, thiab ruaj khov dua thermodynamically. Los ntawm qhov kev xav ntawm kev tswj kev ruaj ntseg, txhim khu kev tiv thaiv ntawm ultraviolet lub teeb, txo cov photoactivity, kev npaj cov tshuaj pleev thaiv hnub yuav tsum sim siv rutile titanium dioxide.
Qhov thib ob, kev xaiv ntawm titanium dioxide particle loj
Titanium dioxide particle loj yog hais txog nws lub peev xwm los tiv thaiv ultraviolet lub teeb. Nyob rau hauv nws cov particle loj yog sib npaug los yog tsawg tshaj li ib nrab ntawm lub wavelength ntawm lub teeb, titanium dioxide nyob rau hauv lub reflection ntawm lub teeb, tawg qhov loj tshaj plaws, qhov zoo tshaj plaws shielding nyhuv. Lub wavelength ntawm ultraviolet lub teeb nyob nruab nrab ntawm 190 thiab 400 nm, yog li qhov loj me ntawm titanium dioxide tsis tuaj yeem loj dua 200 nm, nyiam dua tsis loj dua 100 nm. Nws tsis yog qhov me dua qhov zoo dua, qhov me me ntawm qhov me me yog ib qho yooj yim rau agglomerate, tsis conducive rau dispersion, yooj yim los thaiv cov pores ntawm daim tawv nqaij, tsis conducive rau lub exclusion ntawm ua pa thiab hws. Nws feem ntau lees paub tias qhov loj me ntawm 30 thiab 100nm, ob qho tib si UV tiv thaiv zoo, thaum lub teeb pom kev tuaj yeem kis tau, yog li ntawd cov tawv nqaij dawb zoo nkaus li nplua nuj kev zoo nkauj.
