Likarolo tsa Silika tse Hloekileng tsa Mocheso le Lik'hemik'hale Joalo ka Lintho tse Crucible
- Electro-quartz
- Quartz e kopantsoeng
- Hlama ea silika e kopantsoeng
Tlhaloso e Khutšoane
Lisebelisoa
Fused Silica ke thepa e tala e ntle haholo bakeng sa tšebeliso ea ho etsa matsete, li-refractories, li-foundries, ceramics tsa tekheniki, le lits'ebetso tse ling tse hlokang sehlahisoa se tsitsitseng, se hloekileng se nang le katoloso e tlase haholo ea mocheso.
| Sebopeho sa Lik'hemik'hale | Sehlopha sa Pele | E tloaelehileng | Mophato wa Bobedi | E tloaelehileng |
| SiO2 | 99.9% mets | 99.92 | 99.8% mets | 99.84 |
| Fe2O3 | 50ppm max | 19 | 80ppm boholo | 50 |
| Al2O3 | 100ppm max | 90 | 150ppm max | 120 |
| K2O | 30ppm max | 23 | 30ppm max | 25 |
Mokhoa oa Tlhahiso le Sebopeho
Silika ea Fused e entsoe ka silica e hloekileng e phahameng, e sebelisa theknoloji e ikhethang ea fusion ho netefatsa boleng bo holimo.Silika ea rona ea Fused e feta 99% ea amorphous mme e na le coefficient e tlase haholo ea katoloso ea mocheso le khanyetso e phahameng ho ts'oenyeho ea mocheso.Fused Silica ha e sebetse, e na le botsitso bo botle ba lik'hemik'hale, 'me e na le motlakase o tlase haholo.
Quartz e kopantsoeng e na le thepa e ntle ea mocheso le lik'hemik'hale e le lisebelisoa tsa crucible bakeng sa khōlo e le 'ngoe ea kristale ho tloha ho qhibiliha,' me ho hloeka ha eona ho phahameng le litšenyehelo tse tlaase li etsa hore e khahle haholo bakeng sa kholo ea likristale tse hloekileng haholo. ho hlokahala lesela la pyrolytic carbon coating pakeng tsa ho qhibiliha le crucible ea quartz.
Lintho tse ka sehloohong tsa Silika e Fused
Silika e kopantsoeng e na le likarolo tse 'maloa tse tsotehang mabapi le thepa ea eona ea mochine, ea mocheso, ea lik'hemik'hale le ea optical:
• E thata ebile e tiile, 'me ha e thata haholo ho e etsa mochine le ho e bentša.(Motho a ka boela a sebelisa laser micromachining.)
• Mocheso o phahameng oa mocheso oa likhalase o etsa hore ho be thata ho qhibiliha ho feta likhalase tse ling tsa optical, empa hape o fana ka maikutlo a hore mocheso o batlang o le holimo o ka khoneha.Leha ho le joalo, silika e kopantsoeng e ka 'na ea bontša devitrification (crystallization ea sebakeng seo ka mokhoa oa cristobalite) ka holimo ho 1100 °C, haholo-holo tlas'a tšusumetso ea litšila tse itseng,' me sena se ka senya thepa ea optical.
• Coefficient ea ho atolosa mocheso e tlaase haholo - hoo e ka bang 0.5 · 10−6 K-1.Sena se tlase ka makhetlo a 'maloa ho feta likhalase tse tloaelehileng.Katoloso e fokolang haholo ea mocheso e haufi le 10−8 K−1 e ka khoneha ka mofuta o fetotsoeng oa silica e kopantsoeng le titanium dioxide, e hlahisoang ke Corning [4] mme e bitsoa khalase e kholo e tlase haholo.
• Ho hanyetsa mocheso o phahameng oa mocheso ke phello ea ho atolosoa ho fokolang ha mocheso;ho na le khatello ea kelello e itekanetseng feela ea mochine esita le ha likhahla tse phahameng tsa mocheso li etsahala ka lebaka la ho pholile ka potlako.
• Silika e ka hloeka haholo ka lik'hemik'hale, ho itšetlehile ka mokhoa oa ho etsoa (sheba ka tlase).
• Silika ha e sebetse hantle ka lik'hemik'hale, ntle le hydrofluoric acid le metsoako e matla ea alkaline.Ha lithempereichara tse phahameng, e boetse e qhibiliha ka metsing (haholo ho feta crystalline quartz).
• Sebaka sa ponaletso se pharaletse haholo (hoo e ka bang 0.18 μm ho 3 μm), se lumellang tšebeliso ea silika e kopantsoeng eseng feela sebakeng se feletseng se bonahalang sa spectral, empa hape le ho ultraviolet le infrared.Leha ho le joalo, meeli e itšetlehile haholo ka boleng ba thepa.Mohlala, lihlopha tse matla tsa infrared tse monyang li ka bakoa ke litaba tsa OH, le ho monya ha UV ho tsoa litšila tsa tšepe (sheba ka tlase).
• Joaloka lisebelisoa tsa amorphous, silica e kopantsoeng ke optically isotropic - ho fapana le quartz ea crystalline.Sena se bolela hore ha e na birefringence, mme index ea eona ea refractive (sheba setšoantšo sa 1) e ka khetholloa ka mokhoa o le mong oa Sellmeier.
