Dab tsi yog Titanium Dioxide?
Lub ntsiab tivthaiv ntawm titanium dioxide yog tam sim no2, uas yog ib qho tseem ceeb inorgacic cov xim xim nyob rau hauv daim ntawv ntawm cov khoom dawb tawv lossis hmoov. Nws tsis yog-toxic, muaj siab zoo thiab ci ci, thiab yog suav hais tias yog xim dawb zoo tshaj plaws rau kev txhim kho cov khoom siv whiteness. Nws yog dav siv nyob rau hauv kev lag luam xws li txheej ci, plastics, roj hmab, ntawv, number case, ceramics, iav, thiab lwm yam iav
Ⅰ.Titanium Dioxide Kev Lag Luam Saw Daim Duab:
(1) Cov dej ntws ntawm lub titanium dioxide kev lag luam saw muaj cov ntaub ntawv raw, suav nrog ilmenite, titanium mloog, rutile, thiab lwm yam;
(2) Xeev California hais txog cov khoom lag luam rau Titanium Dioxide khoom.
(3) Cov dej hauv qab yog daim ntawv thov teb ntawm titanium dioxide.Titanium Dioxide yog dav siv nyob rau hauv ntau daim teb, plastics, papermaking, number case, roj hmab, thiab lwm yam.
Ⅱ.Qhov crystal qauv ntawm titanium dioxide:
Titanium Dioxide yog ib hom polymorphous compound, uas muaj peb crystal cov ntawv nyob rau hauv xwm, namely anatase, rutile thiab brookite.
Ob lub rutile thiab anatase muaj rau tetragonal crystal system, uas ruaj khov nyob rau hauv qhov kub tsis xws li; Brookite belongs rau Orthodhombic Crystal Crystal, nrog cov qauv siv lead ua tsis ruaj khov, yog li nws muaj nuj nqis me me hauv kev lag luam tam sim no.
Ntawm peb cov kev teeb tsa, Rutile theem yog qhov ruaj khov tshaj plaws. Anatase theem yuav irreveribly hloov mus rau hauv rutile rau hauv rutile theem siab tshaj 900 ° C, thaum Broorreveribly hloov mus rau hauv rutile ua rau rutile theem siab tshaj 650 ° C.
(1) Cov Phaj Rutile Titanium Dioxide
Nyob rau hauv rutile base titanium dioxide, ti atoms yog nyob ntawm qhov chaw ntawm lub crystal lattice, thiab rau cov oxygen atps yog nyob ntawm cov fab ntawm titanium-oxygen Octahedron. Txhua tus octahedron tau txuas nrog 10 ib puag ncig Octahedrons (suav nrog yim sib koom ntsug vertices thiab ob txoj kev sib koom ua), thiab ob tio2 molecules tsim ib qho ntawm tes.
Schematic daim duab ntawm crystal cell ntawm rutile base titanium dioxide (sab laug)
Txoj kev sib txuas ntawm titanium oxide oxahedron (txoj cai)
(2) Anatase Pase Titanium Dioxide
Hauv anatase thase titanium, txhua titanium-oxygen octahedron muaj kev sib txuas thiab 4 sib koom ua ke), thiab 4 tio2 molecules tsim ib qho ntawm tes.
Schematic daim duab ntawm crystal cell ntawm rutile base titanium dioxide (sab laug)
Txoj kev sib txuas ntawm titanium oxide oxahedron (txoj cai)
Ⅲn.Propation txoj kev ntawm titanium dioxide:
Cov txheej txheem ntau lawm ntawm titanium dioxide feem ntau suav nrog cov txheej txheem sulfuric acid thiab chlorination txheej txheem.
(1) sulfuric acid txheej txheem
Cov txheej txheem sulfuric acid ntawm titanium dioxide kev tsim khoom ntawm titanium txiv qaub ua rau tsim titanium sulfate, uas yog ces hydrolyzed los tsim metatitanic acid. Tom qab laij thiab cov crushing, titanium dioxide khoom yog tau. Txoj kev no tuaj yeem tsim cov anatase thiab rutile titanium dioxide.
(2) cov txheej txheem chlorination
Cov txheej txheem chlorination ntawm titanium dioxide kev tsim khoom cuam tshuam nrog rutile lossis high-titanium sutag lossis tom qab ntawd nqa tawm high-kub chlorination los ua tloanium tetrachloride. Tom qab cov oxidation siab, lub titanium dioxide cov khoom yog tau los ntawm kev lim dej, ntxuav dej, thiab crushing. Cov txheej txheem collorination ntawm titanium dioxide kev tsim khoom tsuas yog tsim cov khoom siv rutile.
Yuav ua li cas paub qhov txawv ntawm cov qhabnias ntawm titanium dioxide?
I. Txoj Kev Siv Lub Cev:
(1)Qhov yooj yim qauv yog los sib piv cov qauv los ntawm kov. Fake titanium dioxide xav tias smoother, thaum muaj cov titinekide hnov zoo li ntxhib.
(2)Los ntawm yaug nrog dej, yog tias koj tso qee qhov titanium dioxide ntawm koj txhais tes, qhov cuav ib qho yooj yim ntxuav, thaum lub ib qho tsis yooj yim ntxuav tawm.
(3)Siv lub khob dej huv thiab ua cov titanium dioxide rau hauv nws. Ib qho uas ntab rau saum npoo yog tiag tiag, thaum lub sij hawm uas tau hais rau hauv qab yog fake (hom no yuav tsis ua haujlwm rau cov khoom lag luam lossis hloov kho).
(4)Xyuas nws solubility hauv dej. Feem ntau, Titanium Dioxide yog soluble hauv dej (tsuas yog rau titanium dioxide tshwj xeeb tsim rau cov plastics tshwj xeeb tsim rau cov tog cua dub, thiab qee cov hluavtaws titanium, uas yog insoluble hauv dej).
Ii. Tshuaj Txuj Ci:
(1) Yog hais tias muaj hmoov calcium ntxiv: ntxiv hydrochloric acid yuav ua rau muaj ntau lub suab tawm tsam nrog cov roj carbonate cov acid los tsim cov roj carbon dioxide).
(2) Yog tias Lithopone yog ntxiv: ntxiv durute sulfuric acid los yog hydrochloric acid yuav ua rau cov qe lwj lwj.
(3) Yog tias cov qauv yog hydrophobic, ntxiv hydrochloric acid yuav tsis ua rau muaj kev tiv thaiv. However, after wetting it with ethanol and then adding hydrochloric acid, if bubbles are produced, it proves that the sample contains coated calcium carbonate powder.
III. Kuj tseem muaj ob txoj hauv kev zoo:
(1) Los ntawm kev siv tib cov mis ntawm PP + 30% GF + 5% PP-G-Mah + (0.5% titing cov ntaub ntawv yog, qhov ntau qhabnias lub titanium dioxide (rutile) yog.
(2) Xaiv lub pob tshab resin, xws li pob tshab abs nrog 0.5% titanium dioxide hmoov ntxiv. Ntsuas nws cov kev hloov pauv lub teeb. Qhov qis dua qhov teeb meem loj yog, qhov ntau qhabnias rau cov hmoov titanium dioxide yog.
Lub Sijhawm Post: Lub Tsib Hlis-31-2024
