I-Aluminium oxide yinto emhlophe noma ebomvu kancane emise okwenduku enobuningi obungu-3.5-3.9g/cm3, indawo yokuncibilika engu-2045, kanye nendawo yokubilisa engu-2980 ℃. Ayincibiliki emanzini kodwa incibilika kancane ku-alkali noma ku-asidi. Kunezinhlobo ezimbili zama-hydrates: i-monohydrate kanye ne-trihydrate, ngayinye inezinhlobonhlobo ezingu-a kanye no-y. Ukushisisa ama-hydrates ku-200-600 ℃ kungakhiqiza i-alumina ecushiwe enomumo ohlukile wekristalu. Ekusetshenzisweni okungokoqobo, i-alumina evuliwe yohlobo lwe-Y isetshenziswa kakhulu. Ukuqina (Hr) kwe-alumina kungu-2700-3000, i-modulus ye-Young ingu-350-410 GPa, i-thermal conductivity ingu-0.75-1.35/(m * h. ℃), kanti i-coefficient yomugqa yokwandisa ingu-8.5X10-6 ℃ -1 (izinga lokushisa -1000 ℃). Ukuhlanzeka okuphezulu kwe-alumina ye-ultrafine inezinzuzo zokuhlanzeka okuphezulu, usayizi wezinhlayiyana ezincane, ukuminyana okuphezulu, amandla okushisa aphezulu, ukumelana nokugqwala, nokucwiliswa kalula. Ukuhlanzeka okuphezulu kwe-ultrafine alumina inezici ezifana nesakhiwo esihle nesifanayo senhlangano, isakhiwo esithile somngcele wokusanhlamvu, ukuzinza okuphezulu kwezinga lokushisa, ukusebenza kahle kokucubungula, ukumelana nokushisa, kanye nekhono lokuhlanganisa ngezinto ezihlukahlukene.
Ukusetshenziswa kwe-alumina ephezulu yokuhlanzeka
I-alumina yokuhlanzeka okuphezulu inezici zokumelana nokugqwala, ukumelana nokushisa okuphezulu, ubulukhuni obukhulu, amandla aphezulu, ukumelana nokugqokwa, ukumelana ne-oxidation, kanye nokufakwa kahle kwendawo enkulu. Isetshenziswa kakhulu emikhakheni yobuchwepheshe obuphezulu efana ne-bioceramics, izitsha zobumba ezinhle, ama-catalysts amakhemikhali, umhlaba ongavamile izimpushana zofuzo lwe-fluorescent olunemibala emithathu, ama-chips wesekethe ahlanganisiwe, amadivayisi omthombo wokukhanya we-aerospace, izinzwa ezizwela umswakama, nezinto zokumunca i-infrared.
Isikhathi sokuthumela: Feb-01-2024