I-Fused Silica Enhle Kakhulu Eshisayo Nezakhiwo Zamakhemikhali Njengezinto Ezibalulekile Ezimbaxakayo

I-Electro-quartz
I-quartz ehlanganisiwe
Isigaxa se-silica esihlanganisiwe

Incazelo emfushane

I-Fused Silica yenziwe nge-silica ehlanzekile kakhulu, isebenzisa ubuchwepheshe obuhlukile bokuhlanganisa ukuze kuqinisekiswe ikhwalithi ephezulu kakhulu. I-Fused Silica yethu ingaphezu kuka-99% i-amorphous futhi ine-coefficient ephansi kakhulu yokwanda okushisayo kanye nokumelana okuphezulu nokushaqeka okushisayo. I-Fused Silica iyi-inert, inokuqina okuhle kakhulu kwamakhemikhali, futhi ine-conductivity kagesi ephansi kakhulu.

XHUMANA MANJE

Izinhlelo zokusebenza

I-Fused Silica iwukusetshenziswa okuhle kakhulu kwe-investimenti yokutshala, izinqaba, izisekelo, izitsha zobumba zobuchwepheshe, nezinye izinhlelo zokusebenza ezidinga umkhiqizo ongaguquki, omsulwa onokwandiswa okushisayo okuphansi kakhulu.

Ukwakheka Kwamakhemikhali	Ibanga Lokuqala	Okujwayelekile	Ibanga lesibili	Okujwayelekile
SiO2	99.9%imizuzu	99.92	99.8%imizuzu	99.84
Fe2O3	50ppm ubuningi	19	80ppm ubukhulu	50
I-Al2O3	100ppm ubukhulu	90	150ppm ubukhulu	120
K2O	30ppm ubuningi	23	30ppm ubuningi	25

Inqubo Yokukhiqiza Nokuziphatha

I-quartz ehlanganisiwe inezinto ezinhle kakhulu ezishisayo namakhemikhali njengezinto ezibonakalayo zokukhula kwekristalu eyodwa kusukela ekuncibilikeni, futhi ukuhlanzeka kwayo okuphezulu nezindleko eziphansi kuyenza ithandeke ikakhulukazi ekukhuleni kwamakristalu ahlanzekile kakhulu. Nokho, ekukhuleni kwezinhlobo ezithile zamakristalu, a ungqimba lwe-pyrolytic carbon coating luyadingeka phakathi kokuncibilika kanye ne-quartz crucible.

Izici ezibalulekile ze-Fused Silica

I-silica ehlanganisiwe inezici ezimbalwa eziphawulekayo kokubili mayelana nemishini yayo, eshisayo, yamakhemikhali kanye ne-optical properties:
• Iqinile futhi iqinile, futhi ayinzima kakhulu ukuyifaka ngomshini nokuyipholisha. (Umuntu angase futhi asebenzise i-laser micromachining.)
• Izinga lokushisa eliphezulu lengilazi likwenza kube nzima kakhulu ukuncibilika kunezinye izibuko zamehlo, kodwa liphinde lisho ukuthi amazinga okushisa aphakeme kakhulu angenzeka. Kodwa-ke, i-silica ehlanganisiwe ingase ibonise i-devitrification (i-crystallization yendawo ngendlela ye-cristobalite) ngaphezu kuka-1100 °C, ikakhulukazi ngaphansi kwethonya lokungcola okuthile okulandela umkhondo, futhi lokhu kungonakalisa izakhiwo zokubona.
• I-coefficient yokwandisa okushisayo iphansi kakhulu - cishe 0.5 · 10−6 K−1. Lokhu kuphansi izikhathi ezimbalwa kunezingilazi ezijwayelekile. Ngisho nokwanda okushisayo okubuthaka kakhulu cishe ku-10−8 K−1 kungenzeka ngendlela eguquliwe ye-silica ehlanganisiwe nenye i-titanium dioxide, eyethulwe yi-Corning [4] futhi ebizwa ngengilazi yokwandisa ephansi kakhulu.
• Ukumelana nokushaqeka okuphezulu kwe-thermal kuwumphumela wokwanda okubuthakathaka kokushisa; kukhona ukucindezeleka kwemishini okuphakathi nendawo ngisho nalapho izinga lokushisa eliphezulu livela ngenxa yokupholisa ngokushesha.
• I-silica ingaba amakhemikhali ahlanzekile kakhulu, kuye ngendlela yokwenziwa (bheka ngezansi).
• I-silica ayisebenzi ngamakhemikhali, ngaphandle kwe-hydrofluoric acid kanye ne-alkaline eqinile. Emazingeni okushisa aphakeme, iphinde inyibilike kancane emanzini (ingaphezulu kakhulu kune-crystalline quartz).
• Isifunda esingafihlisi sibanzi impela (cishe ngo-0.18 μm kuya ku-3 μm), okuvumela ukusetshenziswa kwe-silica ehlanganisiwe hhayi kuphela kuyo yonke indawo ye-spectral ebonakalayo, kodwa futhi ku-ultraviolet ne-infrared. Nokho, imikhawulo incike kakhulu kukhwalithi yezinto ezibonakalayo. Isibonelo, amabhande okumunca aqinile e-infrared angabangelwa okuqukethwe kwe-OH, nokumuncwa kwe-UV kusuka ekungcoleni kwensimbi (bona ngezansi).
• Njengempahla ye-amorphous, i-silica ehlanganisiwe i-optically isotropic - ngokungafani ne-crystalline quartz. Lokhu kusho ukuthi ayinakho i-birefringence, futhi inkomba yayo ye-refractive (bheka Umfanekiso 1) ingabonakala ngefomula eyodwa ye-Sellmeier.