nūhou

ʻO Titanium dioxide (TiO2) ka puaʻa keʻokeʻo kūpono loa no ka loaʻa ʻana o ka keʻokeʻo a me ka mana huna i loko o nā uhi, inika a me nā plastics.ʻO kēia no ka mea he kiʻekiʻe loa kona kuhikuhi refractive a ʻaʻole ia e komo i ka mālamalama ʻike ʻia.Loaʻa koke ʻia ʻo TiO2 ma ke ʻano he mau ʻāpana me ka nui kūpono (d ≈ 280 nm) a me ke ʻano kūpono (ʻoi aʻe a liʻiliʻi spherical) a me nā ʻano lapaʻau like ʻole.

Eia naʻe, he pipiʻi ka puaʻa, ʻoi aku ka nui o ka hoʻohana ʻana i nā kumukūʻai volume o nā ʻōnaehana.A, aia mau ka pono e hoʻomohala i kahi hoʻolālā piha-hōʻoia e loaʻa ai nā hopena maikaʻi loa ma ke ʻano o ke kumukūʻai / ka hoʻokō ʻana, ka hoʻopuehu ʻana, ka hoʻopuehu…Ke ʻimi nei ʻoe i ka mea like?

E ʻimi i ka ʻike kikoʻī o ka puaʻa TiO2, kona maikaʻi hoʻopuehu, ʻoi aku ka maikaʻi, ke koho ʻana, a me nā mea ʻē aʻe e hoʻokō ai i ka ikaika kala keʻokeʻo maikaʻi loa a me ka mana huna i kāu mau hana.

ʻO nā mea a pau e pili ana i ka Titanium Dioxide Pigment

ʻO Titanium dioxide (TiO2) ka puaʻa keʻokeʻo i hoʻohana ʻia no ka hāʻawi ʻana i ka mana keʻokeʻo a me ka huna huna, i kapa ʻia hoʻi ka opacity, i nā uhi, inika, a me nā plastics.ʻO ke kumu o kēia he ʻelua ʻano:
ʻO nā ʻāpana oTiO2 o ka nui kūpono e hoʻopuehu i ka mālamalama ʻike ʻia, loaʻa ka lōʻihi hawewe λ ≈ 380 - 700 nm, no ka mea he kiʻekiʻe ko TiO2 huahelu refractive kiʻekiʻe.
o He keʻokeʻo no ka mea ʻaʻole ia e komo i ka mālamalama ʻikea

He pipiʻi ka puaʻa, ʻoiai ke hoʻohana ʻia nā kumukūʻai volume o nā ʻōnaehana.ʻO ka hapa nui o nā hui pena a me ka inika e kūʻai i nā mea maka no ke kaupaona a kūʻai aku i kā lākou huahana ma ka leo.No ka mea, he ʻano kiʻekiʻe ko TiO2, ρ ≈ 4 g/cm3, hāʻawi nui ka mea maka i ke kumukūʻai leo o kahi ʻōnaehana.

Ka hana ʻana o ka TiO2 Pigment

Hoʻohana ʻia kekahi mau kaʻina hana e hana i ka puaʻa TiO2.Loaʻa iā Rutile TiO2 ma ke ʻano.ʻO kēia no ka mea ʻo ka rutile crystal structure ka thermodynamically stable form of titanium dioxide.Ma nā kaʻina hana kemika hiki ke hoʻomaʻemaʻe ʻia ʻo TiO2 maoli, pēlā e loaʻa ai ka TiO2 synthetic.Hiki ke hana ʻia ka puaʻa mai nā ores, waiwai i ka titanium, i ʻeli ʻia mai ka honua.

Hoʻohana ʻia ʻelua ala kemika e hana i nā puaʻa rutile a me anatase TiO2.

1. Ma ke kaʻina hana sulfate, ua hoʻopili ʻia ka titanium-waiwai oka me ka sulfuric acid, hāʻawi iā TiOSO4.Loaʻa ka TiO2 maʻemaʻe mai TiOSO4 ma nā ʻanuʻu he nui, e hele ana ma o TiO(OH)2.Ma muli o ke kemika a me ke ala i koho ʻia, hana ʻia ka rutile a i ʻole anatase titanium dioxide.

2. Ma ke kaʻina hana chloride, hoʻomaʻemaʻe ʻia ka mea hoʻomaka waiwai nui o ka titanium ma ka hoʻololi ʻana i ka titanium i ka titanium tetrachloride (TiCl4) ma ka hoʻohana ʻana i ke kinoea chlorine (Cl2).Hoʻopili ʻia ka titanium tetrachloride i ka wela kiʻekiʻe, e hāʻawi ana i ka rutile titanium dioxide.ʻAʻole hana ʻia ʻo Anatase TiO2 ma o ka hana chloride.

Ma nā kaʻina ʻelua, hoʻoponopono ʻia ka nui o nā ʻāpana puaʻa a me ka mālama ʻana ma hope o ka hoʻoponopono ʻana i nā pae hope loa i ke ala kemika.