Dab tsi yog Cov Lus Qhia Tshwj Xeeb ntawm TiO2 rau Inks?
1. Qhov cuam tshuam rau cov xim dawb ntawm tus number case
(1) Qhov cuam tshuam ntawm impurities hauv titanium dioxide ntawm cov xim dawb ntawm tus number case. Zoo whiteness ntawm titanium dioxide ua los ntawm tus number case ruaj tsis daj, tuaj yeem ua rau xim luam tawm hauv ntau qhov chaw kom muaj qhov ci thiab ci ntsa iab. Feem ntau, xws li cov kab ntau ntawm cov hlau, chromium, cobalt, tooj liab thiab lwm yam impurities sib xyaw rau hauv titanium dioxide, kev npaj ntawm tus number case yuav tsim cov xim tsis zoo, whiteness yog txo. Qhov no yog vim lub impurity ions nyob rau hauv titanium dioxide, tshwj xeeb tshaj yog hlau ions, thiaj li hais tias cov crystal qauv ntawm titanium dioxide distortion, poob ntawm symmetry thiab tshwm sim. Rutile titanium dioxide yog rhiab heev rau impurities, xws li hlau oxide nyob rau hauv rutile titanium dioxide cov ntsiab lus ntau dua 0. tsim cov tshuaj tiv thaiv xim. Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum xaiv qhov zoo, tsis muaj impurity-dawb titanium dioxide.
(2) Cov duab, qhov loj me thiab kev faib tawm ntawm titanium dioxide hais txog qhov cuam tshuam ntawm kev ua kom dawb. Kev ua tau zoo ntawm titanium dioxide hais cov duab du, tsis muaj lub kaum ntse ntse, yog tias siv cov khoom siv nrog cov angular titanium dioxide nto, yuav ua rau tsis muaj zog ntawm qhov pom ntawm lub teeb thiab txo cov xim dawb ntawm tus number case. Qhov luaj li cas ntawm titanium dioxide particles yuav tsum tau tswj ntawm 0.2 ~ 0.4μm, uas yog sib npaug li 1/2 lub wavelength ntawm pom lub teeb, thiaj li yuav tau siab scattering muaj peev xwm thiab ua nws cov xim tshwm dawb. Thaum cov particle loj tsawg dua 0.1μm, cov siv lead ua yog pob tshab, yog hais tias cov particle loj tshaj 0.5μm, nws yuav txo tau cov scattering peev xwm ntawm cov xim rau lub teeb thiab cuam tshuam lub whiteness ntawm lub tus cwj mem. Vim li no, titanium dioxide yuav tsum muaj qhov loj me me thiab kev faib tawm kom pom kev zoo. Kev xyaum tau ua pov thawj tias rutile titanium dioxide ntau dua li anatase titanium dioxide kev pab them nqi yog qhov zoo, yog li siv hauv kev tsim cov number case ntau dua.
2. Qhov cuam tshuam rau tus number case npog lub hwj chim
(1) Lub refractive index ntawm titanium dioxide siv lead ua nws tus kheej yuav ncaj qha cuam tshuam qhov loj ntawm tus number case npog lub hwj chim. Gravure composite zaj duab xis number case luam ntawv txheej txheem, txhawm rau ua kom cov khoom luam tawm kom tau cov xim ci, cov nyhuv zoo nkauj, yuav tsum siv cov xim dawb priming, thiab tom qab ntawd hauv cov xim luam ntawv. Qhov no yuav tsum tau titanium dioxide nrog cov xim zoo thiab lub zog npog, txwv tsis pub cov nyhuv yuav tsis zoo. Feem ntau, qhov refractive index ntawm titanium dioxide nyob rau hauv cov xim dawb yog qhov zoo tshaj plaws, kev npaj ntawm tus number case dawb, yuav tsum tau siv ntau refractive index ntawm titanium dioxide, thiaj li yuav txhim khu kev tiv thaiv ntawm tus number case dawb.
(2) Qhov loj me, cov qauv particle thiab dispersion ntawm titanium dioxide hais txog qhov cuam tshuam ntawm cov xim dawb. Feem ntau, nyob rau hauv qhov ntau dua 1/2 ntawm qhov pom wavelength, qhov me me ntawm qhov me me, qhov smoother ntawm cov khoom seem, qhov zoo dua qhov dispersion ntawm titanium dioxide nyob rau hauv cov ntaub ntawv sib txuas, lub zog muaj zog dua. Raws li titanium dioxide nws tus kheej muaj cov qauv siv lead ua pom tseeb, nws qhov ntsuas qhov ntsuas tsis zoo yog qhov loj dua li ntawm tus neeg sawv cev sib kis, thiab qhov ntau dua qhov sib txawv ntawm qhov ntsuas qhov ntsuas ntawm ob, lub zog npog lub zog ntawm titanium dioxide siv ntau dua. Kev xyaum tau lees paub tias rutile titanium dioxide muaj lub zog zais zoo dua li anatase titanium dioxide, yog li nws tau siv ntau dua hauv kev tsim cov number case.
3. Qhov cuam tshuam rau tus cwj mem xim lub zog
Lub zog xim ntawm titanium dioxide nyob ntawm qhov muaj peev xwm tawg ntawm titanium dioxide ntawm lub teeb pom kev, thiab nws muaj kev cuam tshuam ncaj qha rau lub zog xim ntawm tus number case, qhov ntau dua qhov tawg coefficient, lub zog muaj zog dua; qhov siab dua qhov refractive Performance index ntawm titanium dioxide, lub zog ntawm cov xim muaj zog. Titanium dioxide yog qhov siab tshaj plaws refractive index nyob rau hauv cov xim dawb, thiab lub refractive index ntawm rutile titanium dioxide yog siab tshaj li ntawm anatase titanium dioxide. Yog li ntawd, kev xaiv ntawm titanium dioxide xaiv lub peev xwm tawg thiab siab refractive index ntawm titanium dioxide.
4. Qhov cuam tshuam rau kev ua haujlwm dispersion
titanium dioxide particle zoo thiab lub teeb pom kev zoo sib xws, cuam tshuam ncaj qha rau kev ua haujlwm ntawm titanium dioxide. Yog hais tias qhov saum npoo ntawm titanium dioxide hais, xav txog kev sib xws, nws cov dispersion yog qhov zoo, kev npaj ntawm cov xim dawb gloss thiab whiteness kuj zoo; conversely, qhov saum npoo ntawm cov khoom ntxhib, diffuse reflection nce, yuav txo tau qhov gloss, dispersion kuj tsis zoo, cuam tshuam ncaj qha rau cov xim dawb ntawm cov number case dawb thiab hloov kev ua haujlwm. Vim li no, titanium dioxide yuav tsum tau kho ua ntej siv.
Tsis tas li ntawd, cov hauv qab no tseem cuam tshuam rau tus number case:
Lub teeb pom kev zoo thiab huab cua tsis kam: Yog tias cov ntawv luam tawm tau muab tso rau sab nraum zoov ntev, nws yog qhov tsim nyog los xyuas kom meej tias titanium dioxide muaj lub teeb pom kev zoo thiab huab cua tsis zoo, txwv tsis pub tus number case yuav daj thiab chalky.
Kev tiv thaiv tshav kub zoo: Rau ci hom luam ntawv hlau number case, cov txheej txheem luam ntawv ci kub txog li 180 degree txog li 2 teev. Cov kev luam ntawv zoo li no xav tau cov titanium dioxide hauv tus number case kom muaj cua sov zoo heev, txwv tsis pub tus number case dawb yuav tig daj thiab poob nws cov luster ntawm qhov kub thiab txias, thiab tej zaum yuav ua rau cov ntawv luam tawm.
Kev nqus roj: Raws li kev luam ntawv nrawm thiab thev naus laus zis nce ntxiv thiab cov inks nrog txo viscosity yuav tsum tau, cov roj nqus ntawm titanium dioxide yuav tsum yog qhov tseem ceeb. Nyob rau hauv cov ntaub ntawv ntawm cov xim concentration tseem unchanged sim mus kho cov roj haum npaum li cas los pab kom lub formulation ntawm ntau viscosity inks.
