He aha ka titanium dioxide?
ʻO ka ʻāpana nui o ka titanium dioxide ʻo TIO2, he pigment kemika inorganic koʻikoʻi ia ma ke ʻano he paʻa keʻokeʻo a pauka paha. ʻAʻohe ona ʻawahia, he keʻokeʻo kiʻekiʻe a me ka ʻālohilohi, a ua manaʻo ʻia ʻo ia ka pigment keʻokeʻo maikaʻi loa no ka hoʻomaikaʻi ʻana i ke keʻokeʻo o nā mea. Hoʻohana nui ʻia ia i nā ʻoihana e like me nā uhi, nā plastics, ka rubber, ka pepa, ka ʻīnika, nā keramika, ke aniani, a pēlā aku.
Ⅰ.Kiʻikuhi kaulahao ʻoihana titanium dioxide:
（1ʻO ka ʻaoʻao luna o ke kaulahao ʻoihana titanium dioxide he mau mea maka, me ka ilmenite, titanium concentrate, rutile, a pēlā aku;
（2ʻO ka midstream e pili ana i nā huahana titanium dioxide.
（3）ʻO ke kahua noi o ka titanium dioxide ka mea ma lalo.Hoʻohana nui ʻia ka Titanium dioxide ma nā ʻano like ʻole e like me nā uhi ʻana, nā plastics, ka hana pepa, ka ʻīnika, ka laholio, a me nā mea ʻē aʻe.
Ⅱ. ʻO ke ʻano kristal o ka titanium dioxide:
ʻO ka Titanium dioxide kahi ʻano hui polymorphous, nona ʻekolu mau ʻano kristal maʻamau i ke ʻano, ʻo ia hoʻi ka anatase, rutile a me ka brookite.
No ka ʻōnaehana kristal tetragonal ʻo rutile a me anatase, kahi paʻa ma lalo o ka mahana maʻamau; no ka ʻōnaehana kristal orthorhombic ʻo brookite, me ka hoʻonohonoho kristal paʻa ʻole, no laila he liʻiliʻi ka waiwai pono i ka ʻoihana i kēia manawa.
Ma waena o nā ʻano hana ʻekolu, ʻo ka pae rutile ka mea paʻa loa. E loli mau ana ka pae Anatase i ka pae rutile ma luna o 900°C, ʻoiai e loli mau ana ka pae brookite i ka pae rutile ma luna o 650°C.
（1）ʻO ka titanium dioxide pae rutile
I loko o ka titanium dioxide pae rutile, aia nā ʻātoma Ti ma ke kikowaena o ka lattice kristal, a aia nā ʻātoma oxygen ʻeono ma nā kihi o ka octahedron titanium-oxygen. Hoʻopili ʻia kēlā me kēia octahedron i 10 mau octahedron e hoʻopuni ana (me ʻewalu mau piko kaʻana like a me ʻelua mau lihi kaʻana like), a ʻelua mau molekala TiO2 e hana i kahi cell unit.
Kiʻikuhi kiʻikuhi o ke kelepona kristal o ka titanium dioxide pae rutile (hema)
ʻO ke ʻano hoʻohui o ka titanium oxide octahedron (ʻākau)
（2）ʻAnatase pae titanium dioxide
I loko o ka titanium dioxide pae anatase, ua pili kēlā me kēia octahedron titanium-oxygen i 8 mau octahedron e hoʻopuni ana (4 mau kihi kaʻana like a me 4 mau piko kaʻana like), a ʻo 4 mau molekala TiO2 e hana i kahi cell unit.
Kiʻikuhi kiʻikuhi o ke kelepona kristal o ka titanium dioxide pae rutile (hema)
ʻO ke ʻano hoʻohui o ka titanium oxide octahedron (ʻākau)
Ⅲ. Nā ʻAno Hoʻomākaukau o ka Titanium Dioxide:
ʻO ke kaʻina hana o ka titanium dioxide e pili nui ana i ke kaʻina hana sulfuric acid a me ke kaʻina hana chlorination.
（1）Ka hana ʻakika sulfuric
ʻO ke kaʻina hana waikawa sulfuric o ka hana ʻana o ka titanium dioxide e pili ana i ka hopena acidolysis o ka pauka hao titanium me ka waikawa sulfuric i hoʻopaʻa ʻia e hana i ka titanium sulfate, a laila hydrolyzed e hana i ka waikawa metatitanic. Ma hope o ka calcination a me ka kuʻi ʻana, loaʻa nā huahana titanium dioxide. Hiki i kēia ʻano hana ke hana i ka anatase a me ka rutile titanium dioxide.
（2）Kaʻina hana chlorination
ʻO ke kaʻina hana chlorination o ka hana ʻana o ka titanium dioxide e pili ana i ka hoʻohuihui ʻana i ka rutile a i ʻole ka pauka slag titanium kiʻekiʻe me ka coke a laila e hoʻokō i ka chlorination wela kiʻekiʻe e hana i ka titanium tetrachloride. Ma hope o ka oxidation wela kiʻekiʻe, loaʻa ka huahana titanium dioxide ma o ka kānana ʻana, ka holoi wai, ka maloʻo ʻana, a me ka kuʻi ʻana. ʻO ke kaʻina hana chlorination o ka hana ʻana o ka titanium dioxide hiki ke hana i nā huahana rutile wale nō.
Pehea e hoʻokaʻawale ai i ka ʻoiaʻiʻo o ka titanium dioxide?
I. Nā Hana Kino:
（1）ʻO ke ʻano maʻalahi loa, ʻo ia ka hoʻohālikelike ʻana i ke ʻano ma ka hoʻopā ʻana. He palupalu ka titanium dioxide hoʻopunipuni, ʻoiai ʻoi aku ka ʻino o ka titanium dioxide maoli.
（2）Ma ka holoi ʻana me ka wai, inā ʻoe e kau i ka titanium dioxide ma kou lima, e maʻalahi ka holoi ʻana i ka mea hoʻopunipuni, ʻoiai ʻaʻole maʻalahi ka holoi ʻana i ka mea maoli.
（3）E lawe i ke kīʻaha wai maʻemaʻe a hoʻokuʻu i ka titanium dioxide i loko. ʻO ka mea e lana ana i luna he mea maoli ia, aʻo ka mea e noho ana i lalo he mea hoʻopunipuni ia (ʻaʻole paha e hana kēia ʻano hana no nā huahana i hoʻāla ʻia a i hoʻololi ʻia paha).
（4）E nānā i kona solubility i ka wai. Ma keʻano laulā, hiki ke hoʻoheheʻe ʻia ka titanium dioxide i ka wai (koe wale nō ka titanium dioxide i hoʻolālā kūikawā ʻia no nā plastics, nā ʻīnika, a me kekahi titanium dioxide synthetic, kahi mea hiki ʻole ke hoʻoheheʻe ʻia i ka wai).
II. Nā ʻano hana kemika:
(1) Inā hoʻohui ʻia ka pauka kalipuna: ʻO ka hoʻohui ʻana i ka waikawa hydrochloric e hoʻoulu ai i kahi hopena ikaika me kahi leo ʻūlū, me ka hana ʻana o ka nui o nā pehu (no ka mea, hana ka calcium carbonate me ka waikawa e hana i ke kalapona ʻokikene).
(2) Inā hoʻohui ʻia ka lithopone: ʻO ka hoʻohui ʻana i ka waikawa sulfuric dilute a i ʻole ka waikawa hydrochloric e hoʻopuka i kahi ʻala hua pala.
(3) Inā he hydrophobic ka hāpana, ʻaʻole e hana ka hoʻohui ʻana i ka waikawa hydrochloric i kahi hopena. Eia nō naʻe, ma hope o ka hoʻomaʻū ʻana me ka ethanol a laila hoʻohui i ka waikawa hydrochloric, inā hana ʻia nā pehu, hōʻoia ia aia ka pauka calcium carbonate i uhi ʻia i loko o ka hāpana.
III. Aia kekahi mau ʻano hana maikaʻi ʻē aʻe ʻelua:
(1) Ma ka hoʻohana ʻana i ke ʻano like o PP + 30% GF + 5% PP-G-MAH + 0.5% titanium dioxide powder, ʻo ka haʻahaʻa o ka ikaika o ka mea i loaʻa, ʻo ka ʻoiaʻiʻo o ka titanium dioxide (rutile).
(2) E koho i kahi resin moakaka, e like me ka ABS moakaka me ka 0.5% pauka titanium dioxide i hoʻohui ʻia. E ana i kona hoʻoili mālamalama. ʻO ka haʻahaʻa o ka hoʻoili mālamalama, ʻoi aku ka ʻoiaʻiʻo o ka pauka titanium dioxide.
Ka manawa hoʻouna: Mei-31-2024
