Cov khoom xyaw thiab cov khoom ntawm High Alkali Fiberglass yog dab tsi?
High-alkali glass fiber compositions drawn from flat glass are known as A-glass fibers, which have a NazO+K〇 content of 14.5% or more. This glass composition also falls near the PQ phase boundary in the NazO-CaO-Si0,ternary system. The replacement of some of the NazO with KO is intended to improve the chemical stability of the glass. The introduction of a small amount of AlzO; substitution of SiO, and substitution of MgO for CaO is to improve the crystallization properties of the glass.AHapioxnHa's study pointed out that the upper temperature of crystallization increases sharply when MgO>4% yog '; Qhov zoo tshaj plaws crystallization ua tau tiav thaum MgO nyob ntawm 3% ~ 4%. Ntxiv mus, qhov zoo tshaj plaws piv ntawm CaO / MgO yuav tsum hloov nyob rau hauv cov kev taw qhia ntawm MgO txo thaum AO: nce.
Lub iav fiber ntau ua qhov kub tsuas yog li 1100 degree, qis dua E iav thiab C iav, yog li koj tuaj yeem siv cov phaj tsis-platinum los tsim qee cov khoom qis. Cov iav fiber ntau tsis tiv taus cov dej yaig, tab sis kuj tsis tiv taus huab cua ya raws ya raws, cov khoom lag luam sai sai, tsis muaj zog thiab tsis tuaj yeem siv tau. Ib lub iav fiber ntau tau txiav txim siab los ntawm atmospheric noo noo yaig ua ntej thiab tom qab lub brittleness ntawm txoj kev txiav txim siab yog siv lub voj voog txoj kev, uas yog, cov fiber ntau rau hauv ib lub voj voog, mus rau qhov kawg ntawm rub, lub pob qhov taub ntawm lub voj voog maj mam txo. , sau qhov tsawg kawg nkaus lub voj voog txoj kab uas hla mus txog rau qhov tawg ua ntej D. Nrog rau txoj kab uas hla ntawm cov fiber ntau d ntxiv rau txoj kab uas hla ntawm lub voj voog lub voj voog D, D / d piv raws li qhov ntsuas ntawm qhov brittleness ntawm ib qho kev ntsuas. Pom tseeb, qhov loj dua qhov sib piv, qhov ntau dua qhov brittleness. iav fiber ntau ua ntej yaig, D=174, D / d=22.8, tom qab yaig, D=228, D / d=29.8. kuj tau siv tib txoj kev los txiav txim siab E iav, C iav thiab A khob ntawm peb hom iav fibers ua ntej thiab tom qab kev kho mob ntawm 100 dej vapor brittleness, cov txiaj ntsig tau pom hauv daim duab 1-12. daim duab tuaj yeem pom los ntawm cov iav fibers, Ib lub iav fiber ntau tom qab 16h tom qab kev kho mob, qhov sib piv D / d nce ntau, thaum cov kev hloov ntawm E iav thiab C iav fiber ntau tsis yog li ntawd.
Cov iav fiber ntau tsis tiv taus dej, tab sis nws tiv taus cov kua qaub yaig 5000cm? thaj tsam ntawm cov fiber ntau hauv 0.25mol / LHSO: nyob rau hauv lub boil kom meej 3h, qhov hnyav poob ntawm 38.8mg. C iav fiber ntau hauv tib lub sijhawm, qhov hnyav poob ntawm 49.2mg, thaum qhov hnyav poob ntawm E iav fiber ntau rau 1063.9mg. Vim tias nws tsis kam rau cov kua qaub, nws tuaj yeem siv rau kev tsim cov khoom siv acid-resistant, xws li roj teeb separator plating tank, acid Cia tank, sulfuric acid cog pos huab lossis acidic gas lim khoom.
Thoob ntiaj teb, lub tebchaws United Kingdom tseem ceeb dua rau kev tsim cov iav fiber ntau. Lub iav fiber ntau tuaj yeem tsim nrog cov iav tawg, tus nqi qis. Txawm li cas los xij, nws tsis yog dej resistant thiab muaj zog tsawg. Kev txwv kev siv lossis kev siv tshuaj hydrophobic lossis kev kho tus neeg sawv cev sib txuas, los tiv thaiv qhov chaw ntawm cov fiber ntau los ntawm kev yaig ntawm dej, A iav fiber ntau tseem muaj qee qhov kev thov nqi. Txawm li cas los xij, nws tsis haum rau kev tsim khoom nrog av nplaum crucibles.
