Khoom Description
Titanium dioxide pigment yog cov hmoov dawb zoo.
Thaum siv cov xim, nws muab rau qhov siab tshaj plaws whiteness thiab opacity. Nws muab cov xim muaj zog zais siab, txhais tau tias muaj peev xwm npog ntsej muag lossis zais cov substrate hauv qab. Nws ua qhov no zoo dua li lwm cov xim dawb.
Niaj hnub no, titanium dioxide pigment yog nyob deb ntawm cov khoom tseem ceeb tshaj plaws uas siv los ntawm kev lag luam pleev xim rau cov xim dawb thiab opacity. Cov khoom tshwj xeeb no tau muab los ntawm qhov ntsuas qhov ntsuas ntawm titanium dioxide. Lub refractive index qhia lub peev xwm khoov thiab tawg lub teeb. Titanium dioxide muaj qhov siab tshaj plaws refractive Performance index ntawm txhua yam khoom paub rau txiv neej, ntau dua li pob zeb diamond. Txhawm rau kom tau txais txiaj ntsig zoo ntawm cov cuab yeej no, titanium dioxide yuav tsum tau mined, ua kom zoo dua thiab hauv av kom zoo, zoo ib yam me me.
Titanium dioxide dawb pigments yog cov kev loj hlob ntawm lub xyoo pua 20th, thiab vim hais tias ntawm lawv lub siab nkaum hwj chim, tsis tshua muaj toxicity thiab tsim nyog tus nqi, lawv tau eclipsed lwm tsoos dawb pigments.
Peb titanium dioxide yog R2 qib rutile xim uas:
Imparts qhov siab tshaj plaws ci ntsa iab thiab lub suab nruab nrab hauv cov xim dawb,
Ua kom ci ntsa iab, huv si tints,
Nws yog yooj yim dispersed thiab ua tau raws li tag nrho cov kev cai ntawm niaj hnub ntau lawm txoj kev,
Muab lub zog zais siab heev thiab yog li kev lag luam hauv kev siv,
Ua kom qis qis, siab-gloss coatings, thiab yog tsim rau tag nrho cov roj, hnyav thiab dej-dej xim thiab coatings rau sab nraum zoov siv.
Keeb kwm thiab keeb kwm
Titanium dioxide tuaj yeem xa mus rau txhua cov xim uas muaj cov khoom sib xyaw ntawm titanium. Lub npe "Permanent White" tau siv rau ntau cov xim, suav nrog titanium dioxide dawb. Cov npe zoo li no tuaj yeem ua rau tsis meej pem thiab muaj ntau yam tseem siv niaj hnub no. Thaum pib ntawm lub xyoo pua 20th kev loj hlob ntawm titanium dioxide dawb pigment tshwm sim ib txhij nyob rau hauv Norway thiab lub tebchaws United States. Ob peb txheej txheem tom qab tau tsim thiab patented los ntawm cov tuam txhab hauv ob lub teb chaws. Kev siv cov titanium dioxide ua cov xim dawb hauv cov neeg ua yeeb yam palettes pib hauv kev sim teb thaum ntxov li xyoo 1916, tab sis nws tsis yog mus txog rau xyoo 1940 uas tau siv ntau cov xim pib.
Qhov chaw
Ntuj tsis tawm los titanium dioxide nyob rau hauv ib daim ntawv uas siv tau raws li ib tug pigment. Titanium dioxide feem ntau yog txuam nrog hlau, feem ntau yog cov ntxhia ilmenite. Nws tseem yog mined nyob rau hauv ib qho ntawm cov ntaub ntawv ntshiab, rutile puam xuab zeb. Kev tso nyiaj ntawm titanium-bearing minerals siv los ua cov khoom siv raw hauv kev tsim cov titanium dioxide pigments tuaj yeem pom nyob hauv ntau qhov chaw hauv ntiaj teb.
Pigment manufacturers hloov cov ntaub ntawv raw los tsim titanium dioxide pigments. Kev tsim cov titanium dioxide pigments yog ib qho txheej txheem ua kom zoo. Qhov no tuaj yeem ua tiav los ntawm cov txheej txheem sulfate, uas siv sulfuric acid ua tus neeg sawv cev sib cais, lossis cov txheej txheem chloride, uas ua haujlwm nrog cov tshuaj chlorine. Thaum ua kom zoo thiab tsim kom muaj qhov loj me me, cov xim tuaj yeem raug kho nrog inorganic oxides thiab cov organic compound kom ua tiav cov kev ua tau zoo dua, xws li kev ua haujlwm yooj yim lossis siab dua huab cua.
Permanence thiab Compatibility
Ob daim ntawv rutile thiab anatase ntawm titanium dioxide dawb yog lightfast. Txawm li cas los xij, raws li Marilyn Laver (saib daim ntawv 5), raug rau lub teeb tuaj yeem ua rau cov xim phototropic hloov hauv qee qhov xwm txheej. Rutile dhau qhov kev hloov pauv xim hloov mus rau qhov tsawg dua li anatase. Cov ntaub ntawv rutile thiab anatase pigment yog ob qho tib si chemically inert, thiab tsis hnov mob nrog cov pa phem hauv huab cua, cov kuab tshuaj organic thiab lwm yam xim. Ntxiv huab cua tiv thaiv thiab dispersibility ntawm titanium dioxide pigments yog muab los ntawm txheej cov xim nrog inorganic los yog organic tshuaj. Peb qib ntawm titanium dioxide yog coated nrog alumina, silica thiab zirconia tebchaw. Qee tus hais tias qhov tsis kam ntawm titanium dioxide pigments rau cov kua qaub thiab alkalies yog qhov zoo rau lawv siv hauv qhov tseeb fresco.
Roj Absorption thiab sib tsoo
Titanium dioxide absorbs cov roj tsawg. Cov roj nqus piv yog 15-20 feem ntawm qhov hnyav ntawm cov roj mus rau 100 qhov chaw los ntawm qhov hnyav ntawm cov xim. Yog tias qhov ntsuas tau yog grams, nws yuav xav tau 15 mus rau 20 grams (los ntawm qhov hnyav) ntawm cov roj linseed rau grind 100 grams (los ntawm qhov hnyav) ntawm cov xim los ua ib qho tawv tawv. Nws ua rau qhov nruab nrab ziab cov roj pleev xim uas tsim cov xim mos, nkig.
Toxicity
Titanium dioxide pigments tau tsim thiab ua tiav rau ze li ib puas xyoo thiab tsis muaj qhov mob hnyav lossis mob ntev uas tshwm sim los ntawm titanium dioxide tau paub. Titanium dioxide tsis suav tias yog qhov phom sij, tab sis kev saib xyuas yuav tsum tau siv los tuav cov hmoov qhuav qhuav kom tsis txhob nqus cov plua plav. Cov Txheej Txheem Ua Haujlwm Ua Haujlwm (OES) rau titanium dioxide hauv huab cua ntawm qhov chaw ua haujlwm tau teeb tsa ntawm 3 mg / m3 tag nrho cov plua plav ua pa. Titanium dioxide tsis xav tias yuav muaj cov mutagenic, carcinogenic, fibrogenic, tshuaj lom lossis ua xua yog tias tus nqi no tau ua raws.
Cim npe nrov: rutile anatase qib titanium dioxide, Suav teb, manufacturers, lwm tus neeg, Hoobkas, pheej yig, luv nqi, hais, luv nqi, dawb qauv
