Ngwakọta Silica dị mma na akụrụngwa kemịkalụ dị ka ihe na-emebi emebi
- Electro-quartz
- Quartz agbakọtara
- Akpụkpọ anụ silica
Nkọwa dị mkpirikpi
Ngwa
Fused Silica bụ akụrụngwa dị mma maka iji nkedo itinye ego, refractories, foundries, teknuzu ceramics, na ngwa ndị ọzọ chọrọ ngwaahịa na-agbanwe agbanwe, ịdị ọcha dị elu yana mgbasawanye ọkụ dị ala.
| Ngwakọta kemịkalụ | Ọkwa mbụ | Ụdị | Ọkwa nke abụọ | Ụdị |
| SiO2 | 99.9% nkeji | 99.92 | 99.8% nkeji | 99.84 |
| Fe2O3 | 50ppm kacha | 19 | 80ppm kacha | 50 |
| Al2O3 | 100ppm max | 90 | 150ppm max | 120 |
| K2O | 30ppm kacha | 23 | 30ppm kacha | 25 |
Usoro Mmepụta na Njirimara
A na-eme Silica Fused site na silica dị oke ọcha, na-eji teknụzụ ngwakọta pụrụ iche iji hụ na ọ kacha mma.Silica Fused anyị karịrị 99% amorphous ma nwee ọnụọgụ dị oke ala nke mgbasawanye ọkụ yana nnukwu iguzogide ujo ọkụ.Silica Fused bụ ihe na-adịghị agwụ agwụ, nwere nkwụsi ike kemịkalụ mara mma, ma nwee ngbanwe eletrik dị ala.
Fused quartz nwere ezigbo thermal na chemical Njirimara dị ka crucible ihe maka otu kristal uto si gbazee, na elu ịdị ọcha na ọnụ ala na-eme ka ọ mara mma karịsịa maka uto nke elu-ọcha kristal. Otú ọ dị, na uto nke ụfọdụ ụdị kristal, a oyi akwa nke pyrolytic carbon mkpuchi chọrọ n'etiti gbazee na quartz crucible.
Njirimara igodo nke Silica Fused
Silica fused nwere ọtụtụ atụmatụ dị ịrịba ama ma gbasara igwe ya, thermal, chemical and optical properties:
• Ọ siri ike ma sie ike, ọ bụghịkwa ihe siri ike iji igwe na polishing.(Otu nwekwara ike itinye micromachining laser.)
• Okpomọkụ mgbanwe iko dị elu na-eme ka ọ sie ike ịgbaze karịa enyo anya ndị ọzọ, mana ọ na-egosikwa na ọ ga-ekwe omume okpomọkụ ọrụ dị elu.Otú ọ dị, silica fused nwere ike igosi devitrification (cristalization mpaghara n'ụdị cristobalite) n'elu 1100 Celsius C, karịsịa n'okpuru mmetụta nke ụfọdụ adịghị ọcha, na nke a ga-emebi ihe anya.
• Ọnụ ọgụgụ mgbasawanye nke okpomọkụ dị oke ala - ihe dịka 0.5 · 10-6 K-1.Nke a dị ọtụtụ ugboro ala karịa nke enyo enyo.Ọbụna mgbasawanye ọkụ na-esighị ike gburugburu 10-8 K-1 ga-ekwe omume site n'ụdị silica fused na ụfọdụ titanium dioxide, nke Corning [4] webatara na nke a na-akpọ ultra low glass glass.
• Mgbochi dị elu nke okpomọkụ bụ ihe si na mgbasawanye ọkụ na-adịghị ike;enwere naanị nrụgide igwe na-agafeghị oke ọbụlagodi mgbe gradients okpomọkụ dị elu na-eme n'ihi ngwa ngwa jụrụ oyi.
• Silica nwere ike ịdị ọcha nke ukwuu, dabere n'usoro nrụpụta (lee n'okpuru).
• Silica bụ chemically nnọọ inert, ewezuga hydrofluoric acid na ike alkaline ngwọta.N'ebe okpomọkụ dị elu, ọ na-esikwa ike n'ime mmiri (karịa kristal quartz).
• Mpaghara nghọta dị oke obosara (ihe dị ka 0.18 μm ruo 3 μm), na-enye ohere iji silica fused ọ bụghị naanị n'ime mpaghara spectral a na-ahụ anya, kamakwa na ultraviolet na infrared.Agbanyeghị, oke na-adabere na ịdịmma akụrụngwa.Dịka ọmụmaatụ, eriri infrared siri ike nwere ike bute ya site na ọdịnaya OH, yana nnabata UV site na adịghị ọcha ọla (lee n'okpuru).
• Dị ka ihe amorphous, silica fused bụ anya isotropic - n'ụzọ dị iche na quartz crystalline.Nke a na-egosi na o nweghị ihe ọ bụla, yana ntuzigharị ya (lee foto 1) nwere ike iji otu usoro Sellmeier mara.
