Taw qhia thiab cov yam ntxwv tseem ceeb ntawm Titanium Dioxide

Titanium dioxide (TiO2) yog ib qho tseem ceeb ntawm inorganic chemical khoom, uas muaj ib qho tseem ceeb siv nyob rau hauv txheej, inks, papermaking, yas roj hmab, tshuaj fiber ntau, ceramics thiab lwm yam lag luam. Titanium dioxide (lub npe lus Askiv: titanium dioxide) yog xim dawb uas nws lub ntsiab yog titanium dioxide (TiO2). Lub npe tshawb fawb yog titanium dioxide (titanium dioxide), thiab cov mis molecular yog TiO2. Nws yog ib qho polycrystalline compound uas nws cov khoom ua haujlwm tsis tu ncua thiab muaj cov qauv lattice. Qhov txheeb ze ntom ntom ntawm titanium dioxide yog qhov tsawg tshaj plaws. Kev tsim cov txheej txheem ntawm titanium dioxide muaj ob txoj hauv kev: txoj kev sulfuric acid thiab chlorination method.

Cov yam ntxwv tseem ceeb:
1) txheeb ze ntom ntom
Ntawm cov feem ntau siv cov xim dawb, qhov txheeb ze ntawm titanium dioxide yog qhov tsawg tshaj plaws. Ntawm cov xim dawb ntawm qhov zoo ib yam, thaj tsam ntawm titanium dioxide yog qhov loj tshaj plaws thiab cov xim ntim yog qhov loj tshaj plaws.
2) Melting point thiab boiling point
Txij li thaum hom anatase hloov mus rau hauv hom rutile ntawm qhov kub thiab txias, lub melting point thiab boiling point ntawm anatase titanium dioxide tsis muaj nyob. Tsuas yog rutile titanium dioxide muaj lub ntsiab lus melting thiab boiling point. Lub melting point ntawm rutile titanium dioxide yog 1850 ° C, lub melting point nyob rau hauv huab cua yog (1830 ± 15) ° C, thiab melting point nyob rau hauv oxygen nplua nuj yog 1879 ° C. Lub melting point yog hais txog lub purity ntawm titanium dioxide. . Qhov kub ntawm rutile titanium dioxide yog (3200 ± 300) ° C, thiab titanium dioxide yog me ntsis volatile ntawm qhov kub siab no.
3) Dielectric tsis tu ncua
Titanium dioxide muaj cov khoom hluav taws xob zoo heev vim nws qhov siab dielectric tas li. Thaum txiav txim siab qee lub cev ntawm titanium dioxide, cov crystallographic kev taw qhia ntawm titanium dioxide crystals yuav tsum tau xav txog. Lub dielectric tas li ntawm anatase titanium dioxide yog qhov tsawg, tsuas yog 48.
4) Kev coj ua
Titanium dioxide muaj cov khoom siv hluav taws xob semiconductor, nws cov conductivity nce sai nrog qhov kub thiab txias, thiab nws kuj tseem ceeb heev rau oxygen deficiency. Lub dielectric tas li thiab semiconductor cov khoom ntawm rutile titanium dioxide tseem ceeb heev rau kev lag luam hluav taws xob, thiab cov khoom no tuaj yeem siv los tsim cov khoom siv hluav taws xob xws li ceramic capacitors.
5) Hardness
Raws li qhov ntsuas ntawm Mohs hardness, rutile titanium dioxide yog 6-6.5, thiab anatase titanium dioxide yog 5.5-6.0. Yog li ntawd, nyob rau hauv cov tshuaj fiber ntau extinction, hom anatase yog siv kom tsis txhob hnav ntawm spinneret qhov.
6) Hygroscopicity
Txawm hais tias titanium dioxide yog hydrophilic, nws hygroscopicity tsis muaj zog heev, thiab hom rutile yog me dua li hom anatase. Lub hygroscopicity ntawm titanium dioxide muaj qee qhov kev sib raug zoo nrog qhov loj ntawm nws qhov chaw. Cov cheeb tsam loj thiab cov hygroscopicity siab kuj muaj feem xyuam rau kev kho deg thiab cov khoom.
7) Thermal stability
Titanium dioxide yog cov khoom siv nrog thermal stability.
8) Granularity
Qhov loj me me ntawm titanium dioxide yog qhov kev ntsuas dav dav, uas cuam tshuam rau kev ua haujlwm ntawm titanium dioxide pigments thiab cov khoom siv ua haujlwm. Yog li ntawd, kev sib tham ntawm npog lub hwj chim thiab dispersibility tuaj yeem ncaj qha txheeb xyuas los ntawm qhov loj me me faib.
Cov yam ntxwv cuam tshuam rau qhov loj me me ntawm titanium dioxide yog qhov nyuaj. Thawj yog qhov loj ntawm qhov loj me me ntawm hydrolysis. Los ntawm kev tswj thiab kho cov txheej txheem hydrolysis, tus thawj particle loj yog nyob rau hauv ib tug tej yam ntau yam. Qhov thib ob yog calcination kub. Thaum lub sij hawm calcination ntawm metatitanic acid, cov hais undergo ib lub sij hawm siv lead ua transformation thiab ib tug loj hlob lub sij hawm, thiab qhov tsim nyog kub yog tswj kom cov kev loj hlob hais nyob rau hauv ib tug tej yam ntau yam. Cov kauj ruam kawg yog pulverization ntawm cov khoom. Feem ntau, kev hloov kho ntawm Raymond zeb thiab kev hloov kho ntawm cov ntsuas ntsuas ceev yog siv los tswj cov pulverization zoo. Tib lub sijhawm, lwm yam khoom siv pulverizing tuaj yeem siv tau, xws li: high-speed pulverizer, dav hlau pulverizer thiab rauj mills.