I-aluminiyam oxide yinto emhlophe okanye ebomvu kancinane emile okwentonga enoxinano lwe-3.5-3.9g/cm3, indawo yokunyibilika ye-2045, kunye nenqanaba lokubila lika-2980 ℃. Ayinyibiliki emanzini kodwa inyibilika kancinane kwialkali okanye kwiasidi. Kukho iindidi ezimbini ze-hydrates: i-monohydrate kunye ne-trihydrate, nganye ineentlobo ze-a kunye no-y. Ukufudumeza i-hydrates kwi-200-600 ℃ inokuvelisa i-alumina esebenzayo ngeemilo zekristale ezahlukeneyo. Kwizicelo ezisebenzayo, uhlobo lwe-Y-alumina olusebenzayo lusetyenziswa ikakhulu. Ubunzima (Hr) be-alumina yi-2700-3000, i-modulus ye-Young yi-350-410 GPa, i-thermal conductivity yi-0.75-1.35 / (m * h. ℃), kunye ne-coefficient yokwandiswa komgca ngu-8.5X10-6 ℃ -1 (ubushushu begumbi -1000 ℃). Ukucoceka okuphezulu kwe-alumina ye-ultrafine ineengenelo zokucoceka okuphezulu, ubungakanani bamasuntswana amancinci, uxinaniso oluphezulu, amandla obushushu obuphezulu, ukumelana nokugqwala, kunye nokuntywila ngokulula. Ucoceko oluphezulu lwe-alumina ye-ultrafine ineempawu ezifana nesakhiwo esilungileyo kunye nesifanayo sombutho, isakhiwo somda weenkozo ezithile, ukuzinza kobushushu obuphezulu, ukusebenza kakuhle kokucubungula, ukumelana nobushushu, kunye nokukwazi ukuhlanganisa izinto ezahlukeneyo.
Ukusetyenziswa kwe-alumina ephezulu
Ucoceko oluphezulu lwe-alumina luneempawu zokuxhathisa umhlwa, ukuxhathisa ubushushu obuphezulu, ubulukhuni obuphezulu, ukomelela okuphezulu, ukuxhathisa ukunxiba, ukumelana ne-oxidation, kunye nokugquma okulungileyo kwindawo enkulu. Isetyenziswa kakhulu kwiinkalo zobuchwephesha obuphezulu obunje nge-bioceramics, iiseramikhi ezintle, iikhemikhali zokwenziwa kweekhemikhali, umhlaba onqabileyo wemibala emithathu yemfuza yomgubo we-fluorescent, iitshiphusi ezidityanisiweyo zesekethe, izixhobo zomthombo wokukhanya kwe-aerospace, izinzwa ezibuthathaka zokufuma, kunye nezixhobo zokufunxa infrared.
Ixesha lokuposa: Feb-01-2024