Hom thiab cov ntsiab lus ntawm impurities Hauv cov txheej txheem titanium dioxide, tshwj xeeb tshaj yog cov txheej txheem sulfuric acid, feem ntau ntawm cov haujlwm yog tshem cov impurities hauv cov khoom. Cov txheej txheem tiav txheej txheem ntawm cov txheej txheem sulfuric acid xav tau cov cuab yeej ua haujlwm qis heev thiab ua kom cov khoom siv tsawg. Ob leeg titanium ore thiab titanium slag yog siv tau. Ntxiv mus, txoj kev no tuaj yeem tsim ua ob qho rutile titanium dioxide thiab anatase titanium dioxide. Tsawg yuav tsum tau thiab lub sijhawm luv luv ntau lawm. Hauv kev lag luam titanium dioxide, tshwj xeeb tshaj yog kuv lub teb chaws' s titanium dioxide kev lag luam tseem nyob hauv txoj haujlwm tseem ceeb heev. Cov tshuaj titanium tau los ntawm sulfuric acid hydrolysis yog qhov kev ua rau kev ncua kev nyuaj, uas muaj cov ntsiab lus tsis zoo tsis xws li ilmenite, tab sis kuj muaj qee qhov zoo uas tsis tau koom nrog qhov tshuaj tiv thaiv, thiab colloidal impurities tsim los ntawm cov ntsiab xws li silicon thiab txhuas. Muaj ntau ntau cov soluble impurities xws li sulfates. Txawm hais tias cov ntsiab lus ntawm qee qhov tsis huv tseem tsawg heev, nws muaj cov txiaj ntsig tsis zoo rau nws qhov tsis zoo. Cov impurities no tsuas yog oxides, thiab qhov kev coj ua kom tsawg ntawm titanium dioxide tshwm sim los ntawm oxides tuaj yeem raug faib ua ob qho xwm txheej, ib qho yog cov xim tsis huv uas cuam tshuam los ntawm cov pa phem, thiab lwm qhov yog xim los ntawm lattice doping. Xim hlau oxide impurities tuaj yeem cuam tshuam rau whiteness ntawm cov ntsiab lus qis heev. Cov ntsiab lus no suav nrog hlau, manganese, chromium, tooj liab, thiab lwm yam Cov impurities muaj lawv tus kheej xim, thiab lawv tau yooj yim tsim hauv cov dawb titanium dioxide. Lub impurities thiab xim concentration yog pom nyob hauv qab hauv qab no.
Hauv qhov tseeb ntau lawm, cov ntsiab lus tsis pub cuam tshuam ntawm kev ua qias tuaj tsis haum ntawm titanium dioxide qis dua qhov saum toj no, thiab lub impurity tuaj yeem txhim kho xim ntawm qhov qis qis. Coj tus hlau los ua piv txwv. Thaum liab Fe3+ nkag rau Ti4+ txoj hauj lwm, nws deforms vim polarization, uas nqus ntau liab dua li qub hlau. Ntxiv rau qhov cuam tshuam los ntawm cov txheej txheem saum toj no, qhov cuam tshuam los ntawm kev hnav tshuab, piv txwv, hauv Raymond, roj hmoov thiab lwm yam khoom siv, vim muaj kev sib txhuam loj, cov khoom siv nyob rau saum npoo ntawm lub tshuab yuav poob tawm, thiab cov impurities tseem yuav raug coj mus rau hauv cov pa roj carbon dioxide, yog li ua kom cov nyhuv ntawm titanium dioxide. Qhov nqus ntawm lub teeb ua rau nws cov tsis pom kev. 2. Particle loj thiab faib loj npaum li cas Cov Particle loj thiab faib qhov loj me kuj yog qhov tseem ceeb cuam tshuam rau kev nplawm ntawm titanium dioxide, uas feem ntau cuam tshuam los ntawm kev xav thiab tawg ntawm lub teeb los ntawm titanium dioxide hais. Tsis pub dhau qee qhov me me cov khoom loj, qhov loj ntawm cov titanium dioxide hais tsawg dua, thaj tsam thaj chaw nce, thiab lub teeb tawg lub peev xwm nce ntxiv, thiab lub siab dawb dua. Los ntawm qhov pom ntawm qhov muag cuam tshuam, thaum lub teeb tawg quab yuam ntau dua, qhov kev sib raug zoo ntawm qhov ntev ntawm cov xim thiab lub nthwv dej ntawm qhov xwm txheej teeb pom kev zoo λ, qhov ntsuas qhov hloov siab ntawm cov xim n1, thiab qhov ntsuas qhov ntsuas qhov xim xim n2 tuaj yeem xam tau los ntawm tus qauv: D = 2λ [π (n1-n2)] Los sawv cev. Hauv cov qauv hais saum toj no, nthwv dej ntawm lub teeb pom kev yog 400-700nm, qhov ntsuas qhov tsis txaus siab ntawm rutile titanium dioxide yog 2.71, thiab qhov ntsuas tsis zoo ntawm cov xim tsev feem ntau (resins) hauv txheej txheej yog 1.45-1.60, yog li ntawd qhov loj me ntawm rutile titanium Cov pa roj yog tswj nyob hauv 0.2 ~ 0.3 μm yog qhov zoo tshaj plaws, cov xim xaj muaj lub zog loj tshaj plaws rau lub zog kom pom qhov pom nyob rau hauv qhov ntau qhov me me no, thiab cov zais siab zog, txiav txim siab lub zog thiab dawb huv tuaj yeem tau txais. Txawm li cas los xij, thaum lub particle loj dua li 0.1μm, vim tias qhov sib txawv ntawm lub teeb, lub teeb dhau los ntawm cov xim xim yam tsis muaj kev cuam tshuam, tab sis qhov zais zog poob qis thiab txawm tias yuav ua pob tshab. Qhov ua tau zoo ntawm ultrafine titanium dioxide yog pob tshab thiab tuaj yeem siv Chaw tsim khoom ntawm lub hnub ci pob tshab saib xyuas cov tawv nqaij ua kom pom kev noj qab haus huv, hom tawv nqaij cream cream yog muag heev thiab muaj lub ntsej muag ntuj. Nws yog tam sim no nrov heev hauv Japanese khoom tu tawv nqaij.
Cov qauv nrov no ntawm Nissan' s" Txhua Lub Hnub Caj Npaum Kub Lub raj mis", uas yog nyiam los ntawm cov poj niam, yog cov tshuaj pleev thaiv hnub ntsiab tseem ceeb yog zinc oxide thiab titanium dioxide. Thib peb, qhov ntsuas txhim kho ntawm titanium dioxide txheej txheej tus neeg sawv cev ntawm titanium dioxide yog qhov sib txawv ntawm qhov ntawm titanium dioxide, uas muaj zoo zais zog. Kev txhim kho ntawm cov roj carbon dioxide titanium yog muaj qhov tsawg, uas cuam tshuam rau qhov dawb ntawm titanium dioxide. Feem ntau, txoj kev npog lub zog yuav tsis zoo yog tias cov tshuaj txheej tau loj. Cov ntsiab lus ntawm titanium dioxide hauv xim-qib titanium dioxide yog feem ntau siab dua 90%, tshwj xeeb li ntawm 92% thiab 98%. Lwm yam tshuaj tsuas yog cov tshuaj pleev xim thiab yog ib qho me me ntawm kev ua kom lub cev tsis huv. Tam sim no, ntau hom txheej txheej ua tuaj yeem raug xaiv raws li nyias cov ntawv thov. Cov khoom siv ua txheej txheem feem ntau suav nrog txhuas txheej, tshuaj pleev xim silicon, zirconium txheej, thiab lwm yam. Nws tseem muaj ob los sis ntau cov txheej txheej siv ua ke, xws li zirconium aluminium txheej Cov ntau npaum li cas ntawm cov tshuaj pleev xim no txawv txav los ntawm cov chaw tsim tshuaj paus mus rau cov chaw tsim khoom. 4. Kev ua tsis zoo hauv cov nplai siv lead ua ntawm titanium dioxide hais. Qhov piv ntawm Ti rau O ntawm titanium dioxide yog 1: 2, tab sis vim muaj kev hloov pauv ntawm kev tsim khoom thiab lwm yam, qhov kawg ntawm cov khoom siv titanium dioxide tuaj yeem tsis muaj O txaus, uas yog, cov pa oxygen tsis zoo, thiab nws yog ntshiab Titanium dioxide tuaj yeem ua rau cov pa atoms kom tawg tawm ntawm cov khoom siv hluav taws xob vim yog lub zog sab nraud xws li hluav taws xob ultraviolet lossis cua sov (TiO2 → Ti2O3+1 / 2O2). O atom hauv Ti4+O22+ siv lead ua yoojyim tawm ob qho khoom siv hluav taws xob kom tawm ntawm lub system, thiab seem tshuav ob qho hluav taws xob kom tsawg dua ob zaug Ti4+ rau Ti3+. Ti4+ tsis muaj xim, thaum Ti3+ yog cov xim xiav xiav. Ti3+ nyob rau hauv cov muaju vim cov pa oxygen tsis muaj lub zog ua haujlwm polarization, thiab lub plhaub hluav taws xob muaj hluav taws xob ntau heev, uas nqus ntau lub teeb ntau dua Ti3+ tsis muaj polarization, yog li cov xim muaj xim hnyav dua xiav-grey theem. 5. Qhov kev faib tawm ntawm cov khoom tawg yooj yim titanium dioxide muaj feem xyuam rau lub zog zais, tshwj xeeb tshaj yog thaum tus nqi ntawm qhov ntxiv me me, tib 100g titanium dioxide tsis tuaj yeem pom pom tseeb pom thaum tawg mus rau 10um thiab 20um, tab sis qhov zoo me me qhov particle loj yuav muaj ntau qhov ntau los txhawm rau nyob hauv txoj hauj lwm tus cob, thiab qhov pom lub teeb refraction yuav muaj ntau yam. Yog hais tias qhov dispersibility ntawm titanium dioxide tsis zoo, cov hmoov yog agglomerated thiab sib koom ua ke, thiab cov hmoov zoo ua coarser, uas yuav ib txwm txo qhov kev npluav thiab zais zog ntawm titanium dioxide.
