Aluminium oxide waa walax cad ama wax yar oo casaan ah oo leh cufnaanta 3.5-3.9g/cm3, barta dhalaalaysa ee 2045, iyo barta karkaraya ee 2980 ℃. Kuma milmi karaan biyaha laakiin wax yar bay ku milmi karaan alkali ama aashitada. Waxaa jira laba nooc oo hydrates ah: monohydrate iyo trihydrate, mid kastaa wuxuu leeyahay kala duwanaansho a iyo y. Kuleylinta hydrateska ee 200-600 ℃ waxay dhalin kartaa alumina firfircoon oo leh qaabab crystal kala duwan. Codsiyada la taaban karo, alumina firfircoon ee nooca Y ayaa inta badan la isticmaalaa. Adag (Hr) ee alumina waa 2700-3000, modules dhallinta waa 350-410 GPa, conductivity kaamerada waa 0.75-1.35 / (m * h. ℃), iyo iskudar ballaarinta toosan waa 8.5X10-6 ℃ -1 (heerkulka qolka -1000 ℃). Nadiifinta sare ee ultrafine alumina waxay leedahay faa'iidooyinka nadiifnimada sare, cabbirka qayb yar, cufnaanta sare, xoogga heerkulka sare, caabbinta daxalka, iyo sintering fudud. Nadiifinta sare ee ultrafine alumina waxay leedahay astaamo ay ka mid yihiin qaab-dhismeed heersare ah oo isku mid ah, qaab dhismeedka xadka hadhuudhka gaarka ah, xasilloonida heerkulka sare, waxqabadka habaynta wanaagsan, iska caabinta kulaylka, iyo awooda isku-dhafka agabyada kala duwan.
Isticmaalka aluminium-nadiifinta sare leh
Nadiifinta sare ee alumina waxay leedahay sifooyinka caabbinta daxalka, iska caabinta heerkulka sare, adkaanta sare, xoogga sare, xirashada caabbinta, caabbinta oksaydhka, iyo dahaarka wanaagsan oo leh aag weyn oo dusha sare ah. Waxaa si weyn loogu isticmaalaa beeraha teknoolajiyada sare sida bioceramics, ceramics fine, kicin kiimikaad, dhulka dhif ah saddex midab hidde fluorescent budo, chips wareeg ah isku dhafan, qalabka isha iftiinka hawada, dareemayaasha xasaasiga ah huurka, iyo qalabka nuugista infrared.
Waqtiga boostada: Febraayo-01-2024