Qhov sib txawv tseem ceeb ntawm anatase rutile thiab brookite yog tias anatase muaj tetragonal unit cell nrog plaub TiO2 units thiab rutile muaj tetragonal unit cell nrog ob TiO2 units, whereas brookite muaj ib orthorhombic unit cell nrog yim TiO2 units.
Titanium dioxide lossis TiO2 yog cov ntxhia tseem ceeb uas tshwm sim ib txwm muaj. Muaj plaub qhov sib txawv ntawm cov titanium dioxide minerals: anatase, rutile, brookite, thiab akaogite.
Anatase yog dab tsi?
Anatase yog ib daim ntawv ntawm TiO2 (titanium dioxide) uas muaj xim xiav rau daj. Cov ntxhia no muaj xim tsaus nti vim muaj cov impurities. Txwv tsis pub, nws tsis muaj xim lossis dawb.
Daim duab 01: Anatase
Anatase tshwm sim nrog lub tetragonal siv lead ua, tab sis nws tsis zoo li kev npaj ntawm atoms ntawm rutile (lawv muaj kev sib txawv). Anatase yog optically tsis zoo (thaum rutile yog optically zoo). Nws muaj cov xim hlau zoo nkauj thaum piv rau cov tsos ntawm rutile. Qee zaum, cov tuam txhab tsim cov pob zeb no ua cov khoom siv hluavtaws vim nws muaj ntau daim ntawv thov hauv kev tsim cov khoom siv semiconductors. Piv txwv li: sol-gel txoj kev suav nrog kev tsim cov tshuaj anatase hom TiO2. Nyob ntawd, hydrolysis ntawm titanium tetrachloride (TiCl4) koom nrog.
Rutile yog dab tsi?
Rutile yog cov ntxhia uas feem ntau muaj TiO2 (titanium dioxide) nrog cov xim liab tob. Nws yog qhov ntau tshaj plaws tshwm sim hauv daim ntawv ntawm titanium dioxide vim nws ruaj khov siab. Rutile muaj polymorphs xws li anatase, brookite, thiab lwm yam. Rutile feem ntau tshwm sim hauv cov pob zeb tsis muaj zog thiab cov pob zeb metamorphic uas nyob rau hauv qhov kub thiab txias.
Daim duab 02: Rutile
Thaum xav txog cov qauv siv lead ua rutile, nws muaj tetragonal unit cell uas muaj titanium cations thiab oxygen anions. Cov titanium cations (Ti + 4) nyob rau hauv cov hlwb muaj kev sib koom tes ntawm 6. Cov pa oxygen anion (O2-) muaj kev sib koom tes 3. Cov khoom tseem ceeb tshaj plaws ntawm rutile yog raws li nram no:
- High refractive index ntawm pom wavelengths
- Laj birefringence
- High dispersion
Peb qhov kev siv tseem ceeb ntawm rutile yog tsim cov khoom siv hluav taws xob refractory, tsim cov xim titanium dioxide, thiab tsim cov hlau titanium. Tsis tas li ntawd, finely hmoov rutile yog ib qho tseem ceeb hauv kev tsim cov xim, yas, thiab ntawv. Qhov ntawd yog vim cov hmoov nplua nuj rutile muaj xim dawb ci ntsa iab. Ntxiv mus, nao-TiO2 hais yog siv nyob rau hauv kev lag luam tshuaj pleev ib ce vim hais tias cov khoom no yog pob tshab rau pom lub teeb thiab tuaj yeem nqus tau UV teeb tib lub sijhawm.
Brookite yog dab tsi?
Brookite yog hom TiO2 (titanium dioxide) uas muaj xim liab-xim av sib sib zog nqus. Nws yog cov qauv orthorhombic ntawm titanium dioxide. Nws tshwm sim nyob rau hauv 4 ib txwm tshwm sim polymorphic qauv. Cov txheej txheem polymorphic yog cov ntxhia uas muaj cov khoom sib xws tab sis cov qauv sib txawv. Feem ntau, brookite suav hais tias yog qhov sib xyaw tsis tshua muaj piv rau lwm cov qauv polymorphic. Nws kuj muaj qhov sib piv loj ntawm cov xov tooj ntawm tes. Feem ntau impurities nyob rau hauv cov ntxhia no yog hlau, tantalum, thiab niobium.
Daim duab 03: Brookite
Cov cwj pwm siv lead ua ntawm brookite yog tabular thiab striated; Qee zaum, nws tuaj yeem ua pyramidal. Qhov tawg ntawm cov pob zeb no yog subconchoidal rau qhov tsis sib xws, thiab cov khoom siv feem ntau yog nkig. Cov luster ntawm cov pob zeb no tuaj yeem piav qhia tias yog submetallic. Cov ntxhia streak xim ntawm brookite yog dawb, thiab nws tuaj yeem ua opaque lossis translucent.
Qhov txawv ntawm Anatase Rutile thiab Brookite yog dab tsi?
Titanium dioxide lossis TiO2 yog cov ntxhia tseem ceeb uas tshwm sim ib txwm muaj. Muaj plaub qhov sib txawv ntawm titanium dioxide minerals: anatase, rutile, brookite, thiab akaogite. Qhov sib txawv tseem ceeb ntawm anatase rutile thiab brookite yog tias anatase muaj tetragonal unit cell nrog plaub TiO2 units thiab rutile muaj tetragonal unit cell nrog ob TiO2 units, whereas brookite muaj ib orthorhombic unit cell nrog yim TiO2 units.
Cov hauv qab no infographic nthuav tawm qhov sib txawv ntawm anatase rutile thiab brookite hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.
Summary – Anatase vs Rutile vs Brookite
Anatase, rutile, thiab brookite yog peb cov qauv sib txawv ntawm titanium dioxide minerals. Qhov sib txawv tseem ceeb ntawm anatase rutile thiab brookite yog tias anatase muaj tetragonal unit cell nrog plaub TiO2 units thiab rutile muaj tetragonal unit cell nrog ob TiO2 units, whereas brookite muaj ib orthorhombic unit cell nrog yim TiO2 units.
