ʻO ka pauka alumina ka mea maka nui o ka grit alumina keʻokeʻo i hoʻopili ʻia a me nā mea abrasive ʻē aʻe, nona nā ʻano o ke kūpaʻa wela kiʻekiʻe, ke kūpaʻa i ka pala a me nā waiwai paʻa. ʻO Nano-alumina XZ-LY101 kahi wai ʻole kala a moakaka, i hoʻohana nui ʻia e like me nā mea hoʻohui i nā resins acrylic like ʻole, nā resins polyurethane, nā resins epoxy, a pēlā aku. Hiki iā ia ke lilo i mea hoʻoheheʻe wai a i ʻole ka ʻaila, a hiki ke uhi ʻia ma nā mea uhi aniani, nā pōhaku makamae, nā mea hana kikoʻī, a pēlā aku; a he ʻokoʻa nā hoʻohana o nā ʻano pauka alumina like ʻole. Ke nānā nei ka mea aʻe i ka hoʻolauna ʻana i ka hoʻohana ʻana i ka pauka alumina ʻano α, γ, a me β.
1.α-alumina pauka
I loko o ka lattice o ka pauka alumina ʻano α, ua hoʻopaʻa paʻa ʻia nā ion oxygen i ke ʻano hexagonal, ua hoʻolaha like ʻia ʻo Al3+ ma ke kikowaena hoʻonohonoho octahedral i hoʻopuni ʻia e nā ion oxygen, a he nui loa ka ikehu lattice, no laila he kiʻekiʻe loa ke kiko heheʻe a me ke kiko paila. ʻAʻole hiki ke hoʻoheheʻe ʻia ka oxidation ʻano α i ka wai a me ka waikawa. Ua kapa ʻia hoʻi he alumini oxide i ka ʻoihana. ʻO ia ke kumu maka no ka hana ʻana i ka alumini metala; hoʻohana ʻia hoʻi e hana i nā piliki refractory like ʻole, nā ipu hoʻoheheʻe refractory, nā paipu refractory, a me nā mea hana hoʻokolohua wela kiʻekiʻe; hiki ke hoʻohana ʻia hoʻi e like me ka abrasive, flame retardant ʻO ka alpha alumina maʻemaʻe kiʻekiʻe ke kumu maka no ka hana ʻana i ka corundum artificial, ka ruby artificial a me ka sapphire; hoʻohana ʻia hoʻi e hana i ka substrate o nā kaapuni hoʻohui nui hou.
2. pauka γ-alumina
ʻO ka alumina ʻano γ ka alumini hydroxide i loko o ka ʻōnaehana dehydration haʻahaʻa haʻahaʻa 140-150 ℃, ua kapa ʻia hoʻi ka ʻoihana he alumina hana, ka glue alumini. ʻO ke ʻano o ka hoʻokokoke ʻana o ka ion oxygen no ka ʻaoʻao kū pololei o ke kikowaena i hoʻopaʻa pono ʻia, Al3 + i hoʻolaha like ʻole ʻia i loko o ka ion oxygen ion i hoʻopuni ʻia e nā hakahaka octahedral a me tetrahedral. ʻAʻole hiki ke hoʻoheheʻe ʻia ka alumina ʻano γ i ka wai, hiki ke hoʻoheheʻe ʻia i loko o ka waikawa ikaika a i ʻole ka hopena alkali ikaika, e hoʻomehana ʻia i 1200 ℃ e hoʻololi ʻia i alumina ʻano α. ʻO ka alumina ʻano γ kahi mea porous, ʻo ka ʻili o loko o kēlā me kēia gram a hiki i nā haneli mika kuea, ka hiki ke hoʻopili ʻia ka hana kiʻekiʻe. ʻO ka huahana ʻoihana he ʻāpana cylindrical kala ʻole a ʻulaʻula iki paha me ke kūpaʻa maikaʻi o ke kaomi. I ka hoʻomaʻemaʻe ʻana i ka petroleum a me ka ʻoihana petrochemical, hoʻohana pinepine ʻia ia ma ke ʻano he adsorbent, catalyst a me ka mea lawe catalyst; i ka ʻoihana he aila transformer, turbine oil deacidification agent, hoʻohana ʻia hoʻi no ka nānā ʻana i ka papa kala; I loko o ka hale hoʻokolohua, he desiccant ikaika kūlohelohe ia, ʻaʻole emi kona hiki ke hoʻomaloʻo ma mua o ka phosphorus pentoxide, a ma hope o ka hoʻohana ʻana i ka 175 ℃ e hoʻomehana ai i ka 6-8h hiki ke hana hou ʻia a hoʻohana hou ʻia.
Pauka 3.β-alumina
Hiki ke kapa ʻia ka pauka alumina ʻano β he pauka alumina hana. Loaʻa i ka pauka alumina i hoʻāla ʻia ka ikaika mechanical kiʻekiʻe, hygroscopicity ikaika, ʻaʻole pehu a nahā paha ma hope o ka omo ʻana i ka wai, ʻaʻohe mea ʻawahia, ʻaʻohe ʻala, ʻaʻole hiki ke hoʻoheheʻe ʻia i ka wai a me ka ethanol, he adsorption ikaika no ka fluorine, hoʻohana nui ʻia no ka wehe ʻana i ka fluoride i ka wai inu ma nā wahi fluorine kiʻekiʻe.
Loaʻa i ka alumina i hoʻāla ʻia ka hiki ke hoʻopili koho i ka wai mai nā kinoea, ka mahu wai a me kekahi mau wai. Ma hope o ka saturation adsorption, hiki ke hoʻōla hou ʻia ma ka wehe ʻana i ka wai ma ka hoʻomehana ʻana ma kahi o 175-315°C. Hiki ke hana ʻia ka adsorption a me ka hoʻōla hou ʻana i nā manawa he nui. Ma waho aʻe o ka hoʻohana ʻia ʻana ma ke ʻano he desiccant, hiki iā ia ke hoʻopili i ka mahu mai ka oxygen haumia, hydrogen, carbon dioxide, kinoea kūlohelohe a me nā mea ʻē aʻe o nā aila lubricating. Hoʻohana ʻia hoʻi ia ma ke ʻano he mea hoʻoulu a me ka mea lawe catalyst a ma ke ʻano he mea lawe no ka nānā ʻana i ka papa kala.