ʻO ka alumini oxide he mea ʻano ʻole me ke ʻano kemika A1203, kahi hui paʻa loa me kahi helu heheʻe o 2054°C a me kahi helu hoʻolapalapa o 2980°C.He aniani ionic hiki keionizedi nā wela kiʻekiʻe a hoʻohana mau ʻia i ka hana ʻana i nā mea refractory.ʻO ka alumina calcined a me ka alumina i loaʻa i ka mea like, akā ma muli o kekahi mau hana hana a me nā ʻokoʻa kaʻina hana ʻē aʻe, i hiki ai i nā mea ʻelua ke hoʻohana i ka hana a no laila e loaʻa kekahi mau ʻokoʻa.
ʻO ka alumina ka mineral nui o ka alumini ma ke ʻano, e ʻoki ʻia a hoʻomoe ʻia me ka hopena sodium hydroxide kiʻekiʻe e loaʻa ai ka hopena sodium alumina;kānana e hoʻoneʻe i ke koena, hoʻomaha i ka kānana a hoʻohui i nā kristal alumini hydroxide, ma hope o ka hoʻoulu ʻana i ka manawa lōʻihi, e decompose ka solution alumina alumina a hoʻoheheʻe i ka alumini hydroxide;E hoʻokaʻawale i ka eha a holoi, a laila e hoʻokaʻawale iā ia ma 950-1200 ° C no ka loaʻa ʻana o ka pauka alumina c-type, ʻo Alumina calcined he alumina c-type.He kiʻekiʻe loa ka helu heheʻe a me ka paila.
ʻAʻole hiki ke hoʻoheheʻe ʻia ka alumina calcined i ka wai a me ka waikawa, ʻike ʻia hoʻi he alumini oxide i ka ʻoihana, a ʻo ia ke kumu kumu no ka hana ʻana i ka metala alumini;hiki ke hoʻohana ʻia i ka hana ʻana i nā ʻāpana like ʻole refractory, refractory crucibles, refractory tubes a me nā mea hana keʻena kiʻekiʻe.hiki ke hoʻohana ʻia e like me ka abrasive, flame retardant a me ka hoʻopiha;ʻO ka alumina calcined maʻemaʻe kiʻekiʻe nō hoʻi ka mea maka no ka hana ʻana i ka corundum artificial, pōhaku haku ʻulaʻula a me ka pōhaku haku uliuli;hoʻohana ʻia no ka hana ʻana i nā substrates papa no nā kaʻa kaʻa hoʻohui nui o kēia wā.ʻO ka alumina calcined a me ka alumina i ke kaʻina hana a me nā ʻano ʻē aʻe he ʻokoʻa liʻiliʻi, ʻokoʻa nā wahi ʻoihana kūpono, no laila i ke kūʻai ʻana i nā huahana ma mua o ka ʻike ʻana i nā wahi kikoʻī o ka hoʻohana.