Titanium dioxide (TiO2) ndi chinthu chofunika kwambiri pakupanga mankhwala, chomwe chimagwiritsidwa ntchito kwambiri popaka, inki, kupanga mapepala, mphira wapulasitiki, ulusi wa mankhwala, zoumba ndi mafakitale ena. Titanium dioxide (dzina lachingerezi: titanium dioxide) ndi pigment yoyera yomwe chigawo chake chachikulu ndi titanium dioxide (TiO2). Dzina la sayansi ndi titanium dioxide (titanium dioxide), ndipo mawonekedwe a molekyulu ndi TiO2. Ndi gulu la polycrystalline lomwe tinthu tating'onoting'ono timapangidwa nthawi zonse ndipo timapanga lattice. Kachulukidwe kakang'ono ka titanium dioxide ndi kakang'ono kwambiri. Njira yopanga titaniyamu woipa ili ndi njira ziwiri: njira ya sulfuric acid ndi njira ya chlorination.
Zofunikira zazikulu:
1) Kachulukidwe wachibale
Pakati pa mitundu yoyera yomwe imagwiritsidwa ntchito kwambiri, kuchuluka kwa titaniyamu woipa ndi kochepa kwambiri. Pakati pa mitundu yoyera yamtundu womwewo, pamwamba pa titanium dioxide ndi yayikulu kwambiri ndipo voliyumu ya pigment ndi yayikulu kwambiri.
2) Malo osungunuka ndi malo otentha
Popeza mtundu wa anatase umasanduka mtundu wa rutile pa kutentha kwakukulu, malo osungunuka ndi malo otentha a anatase titanium dioxide kulibe kwenikweni. Ndi titanium dioxide yokha yomwe imakhala ndi malo osungunuka ndi malo otentha. Malo osungunuka a rutile titanium dioxide ndi 1850 ° C, malo osungunuka mumlengalenga ndi (1830 ± 15) ° C, ndipo malo osungunuka mu mpweya wabwino ndi 1879 ° C. Malo osungunuka akugwirizana ndi chiyero cha titaniyamu dioxide. . Malo otentha a rutile titanium dioxide ndi (3200±300) °C, ndipo titaniyamu woipayo amasinthasintha pang'ono pa kutentha kwakukulu kumeneku.
3) Dielectric nthawi zonse
Titanium dioxide ili ndi mphamvu zabwino kwambiri zamagetsi chifukwa cha kuchuluka kwake kwa dielectric. Pozindikira zina mwakuthupi za titaniyamu woipa, mayendedwe a crystallographic a titaniyamu woipa makhiristo ayenera kuganiziridwa. Dielectric constant ya anatase titanium dioxide ndiyotsika, 48 yokha.
4) Conductivity
Titanium dioxide imakhala ndi semiconductor katundu, ma conductivity ake amawonjezeka mofulumira ndi kutentha, komanso amakhudzidwa kwambiri ndi kusowa kwa okosijeni. Ma dielectric okhazikika komanso semiconductor a rutile titanium dioxide ndi ofunikira kwambiri pamakampani opanga zamagetsi, ndipo zinthu izi zitha kugwiritsidwa ntchito kupanga zida zamagetsi monga ceramic capacitors.
5) Kuuma
Malinga ndi kukula kwa kuuma kwa Mohs, rutile titanium dioxide ndi 6-6.5, ndipo anatase titanium dioxide ndi 5.5-6.0. Chifukwa chake, pakutha kwa ulusi wamankhwala, mtundu wa anatase umagwiritsidwa ntchito kupewa kuvala kwa mabowo a spinneret.
6) Hygroscopicity
Ngakhale titanium dioxide ndi hydrophilic, hygroscopicity yake si yamphamvu kwambiri, ndipo mtundu wa rutile ndi wocheperako kuposa mtundu wa anatase. The hygroscopicity wa titaniyamu woipa ali ndi ubale wina ndi kukula kwa pamwamba dera. Malo akuluakulu apamwamba komanso hygroscopicity yapamwamba imagwirizananso ndi chithandizo chapamwamba ndi katundu.
7) Kukhazikika kwamafuta
Titanium dioxide ndi chinthu chokhala ndi kukhazikika kwamafuta abwino.
8) Granularity
The tinthu kukula kugawa titaniyamu woipa ndi mabuku index, amene kwambiri amakhudza ntchito ya titaniyamu woipa inki ndi ntchito mankhwala ntchito. Choncho, kukambirana za kuphimba mphamvu ndi dispersibility akhoza mwachindunji kusanthula tinthu kukula kugawa.
Zomwe zimakhudza kukula kwa titaniyamu wogawira titaniyamu ndizovuta. Yoyamba ndi kukula kwa choyambirira tinthu kukula kwa hydrolysis. Ndi kulamulira ndi kusintha zinthu hydrolysis ndondomeko, choyambirira tinthu kukula ndi mkati osiyanasiyana. Chachiwiri ndi kutentha kwa calcination. Pa mawerengedwe a asidi metatitanic, ndi particles kukumana kristalo kusintha nyengo ndi kukula nyengo, ndi kutentha koyenera amalamulidwa kuti kukula particles mkati osiyanasiyana. Chomaliza ndi pulverization ya mankhwala. Nthawi zambiri, kusinthidwa kwa mphero ya Raymond ndi kusintha kwa liwiro la analyzer kumagwiritsidwa ntchito kuwongolera mtundu wa pulverization. Nthawi yomweyo, zida zina zopukutira zingagwiritsidwe ntchito, monga: pulverizer yothamanga kwambiri, jet pulverizer ndi nyundo.
Nthawi yotumiza: Jul-28-2023