Ngwa LiF
Nkọwa
kristal anya LiF2 nwere ọmarịcha arụmọrụ IR maka windo na oghere.
Njirimara
| Njupụta (g/cm3) | 2.64 |
| Ebe mgbaze (℃) | 845 |
| Nrụpụta okpomọkụ | 11.3 Wm-1K-1 na 314K |
| Mgbasawanye okpomọkụ | 37 x 10-6 / ℃ |
| Isi ike (Mho) | 113 nwere 600g indenter (kg/mm2) |
| Ikike Okpomọkụ akọwapụtara | 1562 J/ (kg.k) |
| Dielectric Constant | 9.0 na 100 Hz |
| Youngs Modulus (E) | 64.79 GPA |
| Shear Modulus (G) | 55.14 GPA |
| Nnukwu Modul (K) | 62.03 GPA |
| Modul mgbawa | 10.8 MPa |
| Ngwakọta ọnụ ala | C11=112;C12=45.6;C44=63.2 |
Nkọwa mkpụrụ nke LiF
Ngwakọta LiF (lithium fluoride) na-ezo aka na ihe eji dị ka ntọala ma ọ bụ nkwado maka usoro ntinye ihe nkiri dị mkpa dị iche iche n'ọhịa nke optics, photonics na microelectronics.LiF bụ kristal pụtara ìhè na nke ukwuu nke nwere nnukwu bandgap.
A na-ejikarị ihe ndị LiF eme ihe na ngwa ihe nkiri dị mkpa n'ihi nghọta ha magburu onwe ya na mpaghara ultraviolet (UV) yana nnukwu iguzogide okpomọkụ na mmeghachi omume kemịkal.Ha dabara adaba maka ngwa dị ka mkpuchi anya, ntinye ihe nkiri dị mkpa, spectroscopy na microscopy eletrọn.
A na-ahọrọkarị mkpụrụ osisi LiF dị ka ihe mkpụrụ n'ihi na ha nwere obere nnabata na oke UV ma na-adị nro nke ọma maka nha ma ọ bụ nlele ziri ezi.Na mgbakwunye, LiF na-egosipụta nkwụsi ike dị mma na okpomọkụ dị elu ma nwee ike iguzogide ọtụtụ usoro nkwụnye ego dị ka ikuku evaporation, sputtering, na molecular beam epitaxy.
Njirimara nke ihe ndị LiF na-eme ka ha dabara adaba maka ngwa na UV optics, lithography, na X-ray crystallography.Nnukwu nguzogide ha na ihe gburugburu ebe obibi na nkwụsi ike kemịkalụ na-eme ka ha bụrụ ihe dị iche iche maka nyocha dị iche iche na ngwa mmepụta ihe.
Ngwaahịa ndị emetụtara
A maara LiF (lithium fluoride) maka ọmarịcha infrared (IR) ya dị ka ngwa anya maka windo na lenses.Nke a bụ isi ihe ụfọdụ gbasara kristal anya LiF2:
1. Nghọta infrared: LiF2 na-egosipụta nghọta dị mma na mpaghara infrared, karịsịa n'etiti etiti infrared na nke dị anya-infrared wavelengths.Ọ nwere ike ibunye ọkụ n'ogo ogologo nke ihe dịka 0.15 μm ruo 7 μm, na-eme ka ọ dabara maka ngwa infrared dị iche iche.
2. Nri dị ala: LiF2 nwere obere absorption na infrared ụdịdị dị iche iche, na-ekwe ka obere attenuation nke infrared ìhè site na ihe onwunwe.Nke a na-eme ka nnyefe dị elu ma si otú a na-ebufe radieshon infrared nke ọma.
3. Ntụgharị ihe nhụsianya dị elu: LiF2 nwere akara ntugharị dị elu n'ogo ogologo ikuku infrared.Ngwongwo a na-enye ohere njikwa nke ọma na ịmegharị ọkụ infrared, na-eme ka ọ baa uru maka atụmatụ oghere nke kwesịrị ilekwasị anya na ịgbagọ radieshon infrared.
4. Wide bandgap: LiF2 nwere nnukwu bandgap nke ihe dịka 12.6 eV, nke pụtara na ọ na-achọ ntinye ike dị elu iji malite ntụgharị eletrik.Ihe onwunwe a na-enye aka na nghọta dị elu na ntinye dị ala na mpaghara ultraviolet na infrared.
5. Nkwụsi ike nke okpomọkụ: LiF2 nwere ezigbo nkwụsi ike nke okpomọkụ, nke na-enyere ya aka iguzogide okpomọkụ dị elu na-enweghị mmebi arụmọrụ dị ịrịba ama.Nke a na-eme ka ọ dabara maka ngwa metụtara ikpughe na oke okpomọkụ, dị ka sistemu onyonyo ọkụ ma ọ bụ sensọ infrared.
6. Nguzogide kemịkalụ: LiF2 na-eguzogide ọtụtụ kemịkalụ, gụnyere acids na alkalis.Ọ naghị emeghachi omume ma ọ bụ na-eweda ngwa ngwa n'ihu ihe ndị a, na-ahụ maka ịdịte aka na ntụkwasị obi nke ngwa anya sitere na LiF2.
7. Obere birefringence: LiF2 nwere obere birefringence, nke pụtara na ọ naghị ekewa ìhè na steeti polarization dị iche iche.Ngwongwo a dị mkpa n'ime ngwa chọrọ nnwere onwe polarization, dị ka na interferometry ma ọ bụ sistemu ngwa anya ndị ọzọ ziri ezi.
N'ozuzu, a na-akwanyere LiF2 ùgwù nke ukwuu maka ịrụ ọrụ ya dị mma na ụdị infrared, na-eme ka ọ bụrụ ihe bara uru maka windo na anya anya n'ụdị ngwa infrared dị iche iche.Ngwakọta ya nke nghọta dị elu, obere absorption, bandgap sara mbara, nkwụsi ike nke okpomọkụ, nguzogide kemịkalụ, na obere birefringence na-enye aka na arụmọrụ infrared dị mma.
