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Titanium dioxide (TiO2) ndiyo inonyanya kukodzera pigment chena kuwana kuchena uye kuviga simba mumajasi, ingi nemapurasitiki.Izvi zvinodaro nekuti ine yakanyanya kukwirisa refractive index uye haitore chiedza chinooneka.TiO2 inowanikwawo zviri nyore sezvimedu zvine saizi yakakodzera (d ≈ 280 nm) uye chimiro chakakodzera (chinopfuura kana kushoma spherical) pamwe nekusiyana-siyana kwemashure kurapwa.

Nekudaro, iyo pigment inodhura, kunyanya kana vhoriyamu mitengo yehurongwa inoshandiswa.Uye, panogara pachine kudikanwa kwekugadzira yakazara-humbowo zano kuti uwane mibairo yakanaka maererano nemutengo / kuita reshiyo, kuparadzira kushanda zvakanaka, kupararira…Uri kutsvaga zvakafanana here?

Ongorora ruzivo rwakadzama rweTiO2 pigment, kugona kwayo kuparadzira, optimization, sarudzo, nezvimwe kuti uwane yakanyanya kunaka simba reruvara chena uye kuvanza simba mumagadzirirwo ako.

Zvese Nezve Titanium Dioxide Pigment

Titanium dioxide (TiO2) ndiyo chena pigment inoshandiswa kupa kuchena uye kuhwanda simba, inonziwo opacity, kune machira, ingi, uye mapurasitiki.Chikonzero cheizvi chine mativi maviri:
oTiO2 zvimedu zvehukuru chaihwo zvinoparadzira chiedza chinooneka, chine wavelength λ ≈ 380 - 700 nm, zvinobudirira nekuti TiO2 ine yakakwira refractive index.
oIchena nekuti haitore chiedza chinooneka

Iyo pigment inodhura, kunyanya kana vhoriyamu mitengo yehurongwa inoshandiswa.Mazhinji makambani ependi neingi anotenga zvigadzirwa pahuremu uye vanotengesa zvigadzirwa zvavo nehuwandu.Sezvo TiO2 ine huremu hwakati wandei, ρ ≈ 4 g/cm3, iyo mbishi inopa zvakanyanya kumutengo wevhoriyamu.

Kugadzirwa kweTiO2 Pigment

Maitiro mashoma anoshandiswa kugadzira TiO2 pigment.Rutile TiO2 inowanikwa mune zvakasikwa.Izvi zvinodaro nekuti iyo rutile crystal chimiro ndiyo thermodynamically yakagadzikana fomu yetitanium dioxide.Mumakemikari maitiro echisikigo TiO2 anogona kucheneswa, nekudaro kuwana synthetic TiO2.Iyo pigment inogona kugadzirwa kubva kune ores, yakapfuma mutitanium, inocherwa kubva pasi.

Nzira mbiri dzemakemikari dzinoshandiswa kugadzira zvese rutile uye anatase TiO2 pigments.

1.Mukuita sulfate, iyo titanium-rich ore inobatwa ne sulfuric acid, ichipa TiOSO4.Yakachena TiO2 inowanikwa kubva kuTiOSO4 mumatanho akati wandei, ichienda kuburikidza neTiO(OH)2.Zvichienderana nemakemikari uye nzira yakasarudzwa, rutile kana anatase titanium dioxide inogadzirwa.

2.Mukuita chloride, iyo isina kuchena titanium-inopfuma yekutanga inocheneswa nekushandura titanium ku titanium tetrachloride (TiCl4) nekushandisa chlorine gas (Cl2).Iyo titanium tetrachloride inobva yaiswa oxidized pakupisa kwepamusoro, ichipa yakachena rutile titanium dioxide.Anatase TiO2 haina kugadzirwa kuburikidza neiyo chloride maitiro.

Mune zvose zviri zviviri, ukuru hwepigment particles pamwe chete nemashure ekurapa kunogadziriswa nekugadzirisa zvakanaka matanho ekupedzisira mumugwagwa wemakemikari.