Nā waiwai o ka alumina maʻemaʻe kiʻekiʻe

ʻO ka alumini oxide he mea keʻokeʻo a ʻulaʻula iki paha me ka nui o 3.5-3.9g/cm3, kahi heheʻe o 2045, a me kahi paila o 2980 ℃. ʻAʻole hiki ke hoʻoheheʻe ʻia i ka wai akā hiki ke hoʻoheheʻe ʻia i ka alkali a i ʻole ka waika. ʻElua ʻano o ka hydrates: monohydrate a me trihydrate, kēlā me kēia me nā ʻano a me y. ʻO ka hoʻomehana ʻana i nā hydrates ma 200-600 ℃ hiki ke hoʻoulu i ka alumina hoʻōla me nā ʻano aniani like ʻole. Ma nā noi kūpono, hoʻohana nui ʻia ka alumina Y-type activated. ʻO ka paʻakikī (Hr) o ka alumina he 2700-3000, ʻo ka modulus o ka Young he 350-410 GPa, ʻo ka conductivity thermal he 0.75-1.35 / (m * h. ℃), a ʻo ka helu hoʻonui laina he 8.5X10-6 ℃ -1. (ka wela lumi -1000 ℃). Loaʻa ka maikaʻi o ka ultrafine alumina maʻemaʻe kiʻekiʻe o ka maʻemaʻe kiʻekiʻe, ka liʻiliʻi liʻiliʻi liʻiliʻi, ke kiʻekiʻe kiʻekiʻe, ka ikaika wela kiʻekiʻe, ka pale ʻana i ka corrosion, a me ka sintering maʻalahi. Loaʻa nā ʻano alumina ultrafine maʻemaʻe kiʻekiʻe e like me ka hoʻonohonoho hoʻonohonoho maikaʻi a me ke ʻano like ʻole, ka hoʻolālā palena o ka palaoa, ke kūpaʻa wela kiʻekiʻe, ka hana hoʻoponopono maikaʻi, ka pale wela, a me ka hiki ke hoʻohui me nā mea like ʻole.

ʻO ka hoʻohana ʻana i ka alumina maʻemaʻe kiʻekiʻe

Loaʻa i ka alumina maʻemaʻe kiʻekiʻe nā hiʻohiʻona o ka corrosion resistance, ke kiʻekiʻe o ka mahana wela, ka paʻakikī kiʻekiʻe, ka ikaika kiʻekiʻe, ka pale ʻana i ka ʻaʻahu, ke kūpaʻa ʻana, a me ka insulation maikaʻi me kahi ākea ākea. Hoʻohana nui ʻia ia i nā kahua ʻenehana kiʻekiʻe e like me ka bioceramics, nā seramika maikaʻi, nā catalysts kemika, ka honua ʻekolu kala ʻulaʻula fluorescent pauka, nā ʻāpana kaapuni i hoʻohui ʻia, nā ʻenehana kumu kukui aerospace, nā mea ʻike maka haʻahaʻa, a me nā mea infrared absorption.