Sapphire (Al2O3)
Sapphire (Al2O3) yog ib qho siv lead ua txhuas oxide (Al2O3) nrog Mohs hardness ntawm 9, nws yog ib qho ntawm cov ntaub ntawv nyuaj. Qhov hardness ntawm sapphire no ua rau nws nyuaj rau polish siv cov txheej txheem txheej txheem. High optical zoo tiav ntawm sapphire tsis yog ib txwm ua tau. Txij li Sapphire yog qhov ruaj khov heev thiab muaj lub zog zoo txhua yam, nws ib txwm siv los ua cov khoom siv qhov rai qhov twg yuav tsum muaj khawb tiv thaiv. Nws lub siab melting point, zoo thermal conductivity thiab thermal expansion tsis tshua muaj kev ua tau zoo nyob rau hauv qhov kub thiab txias. Sapphire yog chemically inert thiab insoluble rau dej, ntau acids, thiab alkalis rau kub txog li 1,000 ° C. Nws yog feem ntau siv nyob rau hauv IR laser systems, spectroscopy, thiab rugged ib puag ncig khoom.
Khoom Khoom
Refractive Index
1.755 @ 1.064 µm
Abbe Number (Vd)
Nqe: 72.31, 72.99
Thermal Expansion Coefficient (CTE)
8.4x 10-6 /K
Thermal conductivity
0.04 W / m / K
Mohs Hardness
9
Qhov ntom
3.98g / cm33
Lattice Constant
ib = 4,75 a; c=12.97 ib
Melting Point
2030 ℃
Transmission Regions & Daim Ntawv Thov
| Optimum Transmission Range | Ideal Applications |
| 0.18-4.5 hli | Feem ntau siv nyob rau hauv IR laser systems, spectroscopy thiab rugged ib puag ncig khoom |
Daim duab
Cov duab zoo yog kis tau tus mob nkhaus ntawm 10 mm tuab, uncoated sapphire substrate
Lub tswv yim: Sapphire yog me ntsis birefringent, lub hom phiaj dav dav IR qhov rais feem ntau yog txiav hauv txoj kev random los ntawm siv lead ua, txawm li cas los xij ib qho kev taw qhia yog xaiv rau cov kev siv tshwj xeeb uas qhov birefringence yog qhov teeb meem. Feem ntau qhov no yog nrog optic axis ntawm 90 degrees mus rau lub dav hlau nto thiab hu ua "zero degree" khoom. Synthetic optical sapphire tsis muaj xim.
Yog xav paub ntxiv cov ntaub ntawv tshwj xeeb hauv qhov tob, thov saib peb cov catalog optics kom pom peb cov kev xaiv tiav ntawm optics ua los ntawm sapphire.
