Lafu Safaira
Fa'amatalaga
Safaira (Al2O3) tioata tasi o se mea sili ona lelei tele.O loʻo i ai le maualuga o le vevela, faʻaleleia lelei o le vevela, maualuga le maaa, felauaiga infrared ma le mautu vailaʻau lelei.E fa'aaogaina lautele i le tele o vaega o alamanuia, puipuiga a le atunu'u ma su'esu'ega fa'asaienisi (e pei o le fa'amalama fa'amalama infrared maualuga).I le taimi lava e tasi, o se ituaiga o mea e faʻaaogaina faʻapipiʻi tioata tasi.O le mea muamua filifiliga substrate i le taimi nei lanumoana, violet, paʻepaʻe malamalama-emitting diode (LED) ma le lanumoana lanumoana (LD) alamanuia (gallium nitride ata tifaga e tatau ona epitaxial i luga o le substrate safaira muamua), ma o se superconducting taua foi. mea'ai ata.I le faaopoopo atu i le Y-system, La system ma isi ata tifaga maualuga maualuga, e mafai foi ona faʻaaogaina e faʻatupu ai ata fou MgB2 (magnesium diboride) superconducting ata tifaga (e masani lava o le tasi-crystal substrate o le a chemically pala i le taimi o le fausiaina o MgB2. ata tifaga).
Meatotino
| Mama tioata | > 99.99% |
| Fa'asao (℃) | 2040 |
| Malosi (g/cm3） | 3.98 |
| Malosi (Mho) | 9 |
| Fa'alauteleina o le vevela | 7.5 (x10-6/oC) |
| Avela faapitoa | 0.10 ( kalena /oC) |
| Amioga vevela | 46.06 @ 0oC 25.12 @ 100oC, 12.56 @ 400oC ( W/(mK) ) |
| Dielectric tumau | ~ 9.4 @300K ile A axis ~ 11.58@ 300K ile C axis |
| Ma'imau Tanent i le 10 GHz | <2x10-5i A axis , <5 x10-5i le C axis |
Safaira Substrate Faauigaga
Sapphire substrate e faasino i se mea tioata manino e faia i le tioata alumini oxide (Al2O3).O le faaupuga "sapphire" e masani ona faʻaaogaina e faʻamatala ai le ituaiga corundum gemstone, lea e masani ona lanu lanumoana.Ae ui i lea, i tulaga o substrates, safaira e faasino i se tioata faʻatupuina, leai se lanu, maualuga-mama faʻaaogaina i le tele o talosaga.O nisi nei o manatu autu e uiga i substrates safaira:
1. Faiga tioata: Safaira ei ai se fausaga tioata hexagonal lea o loʻo faʻatulagaina faʻasolosolo ai atoms alumini ma okesene.E a'afia i le faiga tioata trigonal.
2. Maaa maualuga: Safaira o se tasi o mea sili ona faigata ua iloa, ma le malosi o le Mohs o le 9. O lenei mea e matua'i maoa'e ma abrasion tete'e, saofaga i lona umi ma le umi i le talosaga.
3. Faʻasalalauga malamalama: Safaira e sili ona lelei le faʻamalamalamaina o le malamalama, aemaise lava i le vaʻaia ma le latalata-infrared itulagi.E mafai ona tuʻuina atu le malamalama mai le tusa ma le 180 nm i le 5500 nm, faʻafaigofie mo le tele o faʻaoga opitika ma optoelectronic.
4. Vaila ma mea faʻainisinia: Safaira e lelei le vevela ma mea faʻainisinia, maualuga le faʻafefeteina, maualalo le faʻalauteleina o le vevela, ma le lelei tele o le faʻaogaina o le vevela.E mafai ona tatalia le maualuga o le vevela, faʻalavelave faʻainisinia ma le uila vevela, ma faʻaoga talafeagai mo le maualuga o le vevela ma le maualuga o le mana.
5. Faʻamautu vailaʻau: Safaira e maualuga le mautu vailaʻau ma e mafai ona teteʻeina le tele o vailaʻau, alkalis ma solvents organic.O lenei vaega e fa'amautinoa ai lona tumau ma le fa'amaoni i si'osi'omaga faigata eseese.
6. Eletise fa'a'ese'ese meatotino: Safaira o se fa'amalo eletise sili ona lelei, lea e aoga mo talosaga e mana'omia ai le fa'amama eletise po'o le fa'amama.
7. Faʻaaogaina: Sapphire substrates e faʻaaogaina lautele i optoelectronics, semiconductors, moli-emitting diodes, laser diodes, optical windows, matamata tioata ma suʻesuʻega faasaienisi.
Sapphire substrates e sili ona taua mo lo latou tuʻufaʻatasia o mea faʻapitoa, masini, vevela ma vailaʻau.O ana meafaitino mata'ina e fetaui lelei mo talosaga mana'omia e mana'omia ai le tumau maualuga, maualuga le manino o le mata, fa'amalo eletise ma le tetee atu i elemene siosiomaga.
