Feded - Cov Khoom Siv Ua Ke Silica, thiab cov khoom siv hluav taws xob tseem ceeb, thiab cov khoom siv hluav taws xob, thiab siab. Nws txoj kev coj dawb huv, kev faib khoom loj, thiab tshuaj lom neeg ncaj qha cuam tshuam rau cov qauv kev lag luam (xws li cov qauv kev lag luam (xws li cov qauv kev lag luam Cov hauv qab no piav qhia tag nrho cov txheej txheem, los ntawm cov qauv pretricatment, kev sim cov tub ntxhais cov ntsuas, rau kev txhais cov ntaub ntawv.
Qauv Pretreatment: Thawj kauj ruam los ua kom paub txog kev soj ntsuam sawv cev
Feded - qib qib silica hmoov feem ntau yog feem ntau xa hauv hnab lossis ntau. Qauv Pretreatment Pretreatment yog yuav tsum tau tshem tawm ib puag ncig kev cuam tshuam ib puag ncig ua ntej kev sim. Ua ntej, tsuas yog xaiv cov sawv cev cov qauv (raws li GB / T 6679, "cov cai dav dav rau kev kuaj cov khoom ntawm cov khoom siv tshuaj lom neeg zoo"). Rau cov batches tsawg dua los yog sib npaug rau 500 kg, qauv tsawg kawg tsib lub ntsiab lus. Tom qab sib tov, txo kom kwv yees li 500 g. Tom ntej no, qhuav cov qauv hauv qhov cub ntawm 105 ± 2℃rau 2 teev (tshem tawm tshem tawm cov dej noo dawb thiab tsis txhob ua yuam kev hauv kev sim tom ntej). Tam sim ntawd txias cov qauv rau chav sov hauv lub desiccator ua ntej siv. Yog tias qhov kev sim cuam tshuam nrog siab {14 14}} kub ua tau zoo (xws li poob rau cov qauv "thiab khaws cia nyias.
Cov khoom ntsuas tseem ceeb thiab cov txheej txheem
Cov cim tseem ceeb ntawm feded - cov khoom lag luam silica hmoov tuaj yeem yog cov khoom siv lub cev, tshuaj lom neeg cov yam ntxwv, thiab cov khoom muaj nuj nqi. Cov txheej txheem kev ntsuas tshwj xeeb yog raws li hauv qab no:
(I) Kev Ntsuas Cov Khoom Siv Hauv Lub Cev: Thawj zaug kuaj pom ntawm tsos thiab lub cev
1.Txoj kev tshuaj xyuas: Visually soj ntsuam nyob rau hauv lub teeb ntuj, lub teeb xim av silica hmoov (tej zaum yuav tshwm sim
2. Kev txiav txim siab ntom ntom ntom: Siv tus qauv PBNATOMIC (raws li GB / T 208-2014), hnyav hnyav kwv yees li 1g ntawm cov qauv qhuav rau hauv lub pycnometer uas paub. Tom qab ntawd, ntxiv anhydous ethanol (tsis suav pa npuas). Ntsuas tag nrho cov pawg thiab laij cov tseeb ntom ntom (cov nqi raug 2.2-2.3g / cm³).
3. Kev Kuaj Zoo: Siv WSB {{v Ntse Zoo Tus Kheej, raws li GB / T 17749 {5} {{5} {5} {5} { Calibrate nrog tus qauv dawb phaj thiab nyeem tus nqi (cov hmoov zoo fuster Silica hmoov yuav tsum muaj qhov zoo tshaj plaws lossis sib npaug rau 90%).
(II) Tshuaj Xyuas Kev Ntsuam Xyuas Kev Lom Zem: Tus yuam sij tswj
Tus tseem ceeb ntawm feded -} qib qib silica hmoov nta nyob rau hauv nws cov siab siab (sio₂ cov ntsiab lus ntau dua los yog sib npaug rau 99.5%). Yog li ntawd, cov hlau oxides thiab cov khoom phom sij yuav tsum tau sim tshwj xeeb:
1.Silicon dioxide (sio₂) Cov ntsiab lus: Lub Hydrofluoric Acid {}}} sulfuric did volatilization txoj kev (classic tshuaj ntsuam) yog siv. Tom qab cov qauv calcined ntawm qhov kub thiab txias, hydroflofluoric acid yog siv los yaj cov amorphous silicon dioxide (tso si sif₄ roj). Cov seem seem yog tus kab mob khaus. Lub sio₂ cov ntsiab lus yog xam los ntawm kev rho tawm (yuam kev tsawg dua lossis sib npaug rau 0.3%).
2.Metallic impurities (FE, AL, CA, thiab lwm yam)}}}}}}}}}}}}}}}}}} Kev siv ntawm cov yam ntxwv emission tsawg dua lossis sib npaug rau 0.02%, al₂o₃ tsawg dua lossis sib npaug lossis sib npaug rau 0.03%).
3. Chloride (CLT) thiab sulfate (so₄²⁻): rau hluav taws xob -- ASTOR yuav tsum tau kuaj. Dissolve cov qauv me me hauv cov dej deionized, lim, thiab tshawb xyuas siv ib qho Ihation Chromatograph (IC). (Hauv ntim hauv ntim {-}}}}}}}}}}}}}}} tsawg dua los yog sib npaug rau 5ppm thiab so₄²⁻ tsawg dua lossis sib npaug rau 10ppm.)
(III) Cov Particle loj cov khoom lag luam faib: Qhov tseem ceeb cuam tshuam rau filling thiab wightability
Lub particle loj ntawm fused silica hmoov ncaj qha cuam tshuam rau nws dispersion hauv resins hauv resins / ceramics thiab qhov ntom ntawm cov khoom kawg. Laser diffraction (raws li ISO 13320) feem ntau siv rau kev sim:
• Cov hnoos qeev qhuav yog ultrasonically dispersed nyob rau hauv anhydre ethanranol (kom tiv thaiv particle agglomeration) thiab txhaj rau hauv qhov qauv ntawm lub cev ntub;
• Ib qho nqaj lasbuminates taws cov pawg, ua kom muaj teeb ci ntsa iab. Tus ntes tau txais cov paib tawg ntawm cov ces kaum sib txawv, thiab cov kev faib tawm loj me me yog suav siv cov mie scattering kev tshawb xav.
• Cov kev txiav txim siab tseem ceeb suav nrog D50 (median lub taub, feem ntau yog tsawg dua lossis sib npaug ntawm thaj tsam (feem ntau yog ib txoj kev (koom nrog 30 m² / g). Cov ntawv thov sib txawv (piv txwv li, IC ntim yuav tsum tau finer particle loj, nrog D50 ntawm ≈1 txog 3 μm) yuav tsum tau hloov kho ntawm cov txheej txheem tshuaj ntsuam xyuas.
(IV) Ntxiv Kev Ntsuas Ua Haujlwm (raws li xav tau)
Rau cov ntawv thov tshwj xeeb (xws li high - zaus tooj liab- clad laminates thiab cov cuab yeej ntxiv yuav raug ntxiv:
• Kev ua raws li: Ntsuas qhov cuam tshuam ntawm cov seem soluble ions ntawm Circuit Court kev ua tau (yuav tsum tau ua kom tsawg dua lossis sib npaug ntawm 10μs / cm);
• Coeffal nthuav (CTE): Ntsuas siv cov hmoov nplej siab (CTE)
• kua qaub thiab alkali tsis kam: rawv cov qauv hauv kev txo mob 24- cov khoom lag luam zoo tshaj lossis sib npaug rau 0.1%.
Cov ntaub ntawv kev tshuaj xyuas thiab qhia txog kev tshaj tawm
Tom qab tag nrho cov kev ntsuam xyuas tau ua tiav, ntsuas qhov tseem ceeb yuav tsum tau piv nrog kev pom zoo dua lossis muaj kev sib luag rau 0.01%, thiab D50 tsawg dua los yog sib luag rau 3μm). Yog hais tias ib qho taw qhia tau tshaj qhov muaj ntau yam (piv txwv li, whiteness<85% or Cl⁻ >10PPM), rov qab los yog yuav tsum tau (RE {{}} kev piv txwv thiab rov ua dua cov txheej txheem kuaj). Thaum kawg, ib txoj kev uas muaj cov lus qhia, cov ntaub ntawv ntsuas, hnub ua tiav, thiab siv cov ntaub ntawv sau tseg thaum muaj daim ntawv pov thawj CMA / CNAs).
Tag
Cov txheej txheem ntsuas rau feded - qib qib silica hmoov yog qhov tseem ceeb los ua kom nws siab- Kev Ua Ntawv Thov. Los ntawm cov qauv nruj ua ntej kom ntsuas cov tshuaj lom thiab ntsuas lub cev, txhua kauj ruam yuav tsum ua raws li cov txheej txheem qauv. Los ntawm kev sim ua haujlwm, tsis tsuas yog tuaj yeem tsim cov khoom lag luam hauv cov neeg tsim khoom noj kom zoo nkauj (tab sis nws tseem tuaj yeem muab cov kev vam meej txhim kho thoob plaws txhua txoj kev lag luam.
