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Titanium dioxide (TiO2) ndiye mtundu woyenera kwambiri wa pigment kuti upeze kuyera ndi kubisala mphamvu mu zokutira, inki ndi mapulasitiki.Izi ndichifukwa choti ili ndi index yotsika kwambiri ndipo siyitenga kuwala kowoneka.TiO2 imapezekanso mosavuta ngati tinthu tating'onoting'ono tomwe timakhala ndi kukula koyenera (d ≈ 280 nm) ndi mawonekedwe olondola (ozungulira kapena ozungulira) komanso ndi njira zosiyanasiyana zochiritsira.

Komabe, mtundu wa pigment ndi wokwera mtengo, makamaka pamene mitengo yamagetsi imagwiritsidwa ntchito.Ndipo, nthawi zonse pamakhala kufunikira kopanga njira yotsimikizirika kuti mupeze zotsatira zabwino kwambiri potengera mtengo / magwiridwe antchito, kufalitsa bwino, kubalalitsidwa…Kodi mukusaka zomwezo?

Dziwani zambiri za mtundu wa TiO2, kufalikira kwake, kukhathamiritsa, kusankha, ndi zina zambiri kuti mukwaniritse mphamvu zamtundu woyera komanso kubisala mphamvu mumapangidwe anu.

Zonse Zokhudza Titanium Dioxide Pigment

Titanium dioxide (TiO2) ndi mtundu woyera womwe umagwiritsidwa ntchito kupangitsa kuyera ndi kubisala mphamvu, yotchedwanso opacity, ku zokutira, inki, ndi mapulasitiki.Zifukwa izi ndi ziwiri:
Tinthu tating'onoting'ono ta oTiO2 timamwaza kuwala kowoneka bwino, kukhala ndi kutalika kwa mafunde λ ≈ 380 - 700 nm, chifukwa TiO2 ili ndi cholozera chowoneka bwino.
o Ndi oyera chifukwa satenga kuwala kowonekera

Pigment ndi yokwera mtengo, makamaka pamene mitengo yamagetsi imagwiritsidwa ntchito.Makampani ambiri opaka utoto ndi inki amagula zopangira pa kulemera kwake ndikugulitsa zinthu zawo ndi voliyumu.Popeza TiO2 ili ndi kachulukidwe kwambiri, ρ ≈ 4 g/cm3, zopangirazo zimathandizira kwambiri pamtengo wamagetsi.

Kupanga kwa TiO2 Pigment

Njira zingapo zimagwiritsidwa ntchito popanga mtundu wa TiO2.Rutile TiO2 imapezeka m'chilengedwe.Izi ndichifukwa choti mawonekedwe a rutile crystal ndi mawonekedwe okhazikika a titanium dioxide.Mu mankhwala njira zachilengedwe TiO2 akhoza kuyeretsedwa, motero kupeza kupanga TiO2.Pigment imatha kupangidwa kuchokera ku ores, olemera mu titaniyamu, omwe amakumbidwa kuchokera kudziko lapansi.

Njira ziwiri zamankhwala zimagwiritsidwa ntchito popanga mitundu yonse ya rutile ndi anatase ya TiO2.

1.Mu njira ya sulphate, ore wolemera wa titaniyamu amachitidwa ndi sulfuric acid, kupereka TiOSO4.TiO2 yoyera imapezeka kuchokera ku TiOSO4 munjira zingapo, kudutsa TiO(OH)2.Kutengera chemistry ndi njira yosankhidwa, rutile kapena anatase titanium dioxide amapangidwa.

2.Mu njira ya chloride, zinthu zoyambira zokhala ndi titaniyamu zopanda pake zimatsukidwa potembenuza titaniyamu kukhala titaniyamu tetrachloride (TiCl4) pogwiritsa ntchito mpweya wa chlorine (Cl2).Titaniyamu tetrachloride ndiye oxidized pa kutentha, kupereka koyera rutile titaniyamu woipa.Anatase TiO2 sanapangidwe kudzera munjira ya chloride.

Muzochita zonsezi, kukula kwa tinthu tating'onoting'ono ta pigment komanso pambuyo pa chithandizo kumasinthidwa ndi kukonza bwino njira zomaliza mu njira ya mankhwala.