The Core Role of Silica (SiO2) mu E-Glass

Silica (SiO2) imagwira ntchito yofunika kwambiri komanso yofunika kwambiriE-galasi, kupanga mwala chifukwa cha zabwino zake zonse. Mwachidule, silica ndi "network kale" kapena "mafupa" a E-glass. Ntchito yake ikhoza kugawidwa m'magulu otsatirawa:

1. Mapangidwe a Glass Network Structure (Core Function)

Ichi ndiye ntchito yofunika kwambiri ya silika. Silika ndi galasi-kupanga oxide palokha. SiO4's tetrahedra yake imalumikizidwa wina ndi mnzake kudzera pakumanga maatomu okosijeni, kupanga maukonde opitilira, olimba, komanso osasinthika amitundu itatu.

• Kufananiza:Izi zili ngati mafupa achitsulo a nyumba yomwe ikumangidwa. Silika imapereka chimango chachikulu cha magalasi onse, pamene zigawo zina (monga calcium oxide, aluminium oxide, boron oxide, etc.) ndizo zipangizo zomwe zimadzaza kapena kusintha mafupawa kuti asinthe ntchito.
• Popanda mafupa a silika awa, chinthu chokhazikika chagalasi sichingapangidwe.

2. Kupereka kwa Ntchito Yabwino Kwambiri Yopangira Magetsi

• High Electrical Resistivity:Silika palokha imakhala ndi ma ion otsika kwambiri, ndipo chomangira chamankhwala (Si-O bond) chimakhala chokhazikika komanso champhamvu, zomwe zimapangitsa kuti zikhale zovuta kuyimitsa. Netiweki yosalekeza yomwe imapanga imaletsa kwambiri kusuntha kwa magetsi amagetsi, kupatsa magalasi a E-magalasi okwera kwambiri komanso osasunthika.
• Low Dielectric Constant ndi Low Dielectric Loss:Ma dielectric a E-glass ndi okhazikika pama frequency apamwamba komanso kutentha kwambiri. Izi makamaka chifukwa cha symmetry ndi kukhazikika kwa dongosolo la SiO2 ​, zomwe zimapangitsa kuti pakhale polarization yochepa komanso kuchepa kwa mphamvu (kutembenuzidwa ku kutentha) m'munda wamagetsi wamagetsi. Izi zimapangitsa kuti zikhale zabwino kuti zigwiritsidwe ntchito ngati zolimbikitsira pama board amagetsi amagetsi (PCBs) ndi ma insulators apamwamba kwambiri.

3. Kuonetsetsa Kukhazikika Kwama Chemical

E-galasi imawonetsa kukana kwamadzi, ma acid (kupatula hydrofluoric ndi hot phosphoric acid), ndi mankhwala.

• Inert Surface:Netiweki ya Si-O-Si yowundana imakhala ndi ntchito yotsika kwambiri yamankhwala ndipo sagwirizana ndi madzi kapena ma H + ions. Chifukwa chake, kukana kwake kwa hydrolysis ndi kukana kwa asidi ndizabwino kwambiri. Izi zimawonetsetsa kuti zida zophatikizika zolimbikitsidwa ndi E-glass fiber zimasunga magwiridwe antchito kwa nthawi yayitali, ngakhale m'malo ovuta.

4. Kuthandizira pa Mphamvu Zapamwamba zamakina

Ngakhale mphamvu yomaliza yagalasi ulusiimakhudzidwanso kwambiri ndi zinthu monga zolakwika zapamtunda ndi ming'alu yaying'ono, mphamvu zawo zongoyerekeza zimachokera ku zomangira zolimba za Si-O komanso mawonekedwe amtundu wa maukonde atatu.

• High Bond Energy:Mphamvu ya mgwirizano wa Si-O chomangira ndi yokwera kwambiri, zomwe zimapangitsa kuti mafupa a galasi azikhala olimba kwambiri, kupereka ulusi ndi mphamvu zolimba kwambiri komanso zotanuka modulus.

5. Kupereka Makhalidwe Abwino Otentha

• Chiwongolero Chowonjezera Chotentha Chochepa:Silika palokha imakhala ndi coefficient yotsika kwambiri yakukula kwamafuta. Chifukwa chimagwira ntchito ngati mafupa akulu, galasi la E-galasi lilinso ndi gawo locheperako lokulitsa matenthedwe. Izi zikutanthauza kuti ili ndi kukhazikika kwabwino pakusintha kwa kutentha ndipo sikungathe kuyambitsa kupsinjika kwambiri chifukwa cha kuchuluka kwa kutentha ndi kutsika.
• Malo Ofewetsa Kwambiri:Malo osungunuka a silika ndi okwera kwambiri (pafupifupi 1723∘C). Ngakhale kuwonjezeredwa kwa ma oxides ena osinthasintha kumachepetsa kutentha komaliza kwa E-glass, core yake ya SiO2 imatsimikizirabe kuti galasi ili ndi malo ochepetsetsa kwambiri komanso kukhazikika kwa kutentha kuti akwaniritse zofunikira za ntchito zambiri.

Mu wambaE-galasikapangidwe ka silika, zomwe zili mu silika nthawi zambiri zimakhala 52% -56% (kulemera kwake), ndikupangitsa kuti ikhale gawo limodzi lalikulu kwambiri la okusayidi. Imatanthauzira zofunikira za galasi.

Gawo la Ntchito pakati pa Oxides mu E-Glass:

• SiO2(Silika): Chigoba chachikulu; amapereka kukhazikika kwapangidwe, kutsekemera kwamagetsi, kukhazikika kwa mankhwala, ndi mphamvu.
• Al2 O3(Alumina): Wothandizira network kale ndi stabilizer; kumawonjezera kukhazikika kwa mankhwala, mphamvu zamakina, komanso kumachepetsa chizolowezi cha devitrification.
• B2 O3 ndi(Boron oxide): Flux ndi katundu modifier; amachepetsa kwambiri kutentha kosungunuka (kupulumutsa mphamvu) pamene akuwongolera kutentha ndi magetsi.
• CaO/MgO(Calcium Oxide/Magnesium Oxide): Flux ndi stabilizer; imathandizira kusungunuka ndikusintha kukhazikika kwamankhwala ndi ma devitrification.