Dab tsi yog silica hmoov siv?
Kev siv cov tshuaj lom ze precipitated yog qhov dav heev, thiab txawv cov khoom siv sib txawv. Siv raws li tus neeg pab txhawb nqa zoo rau cov roj hmab hluavtaws, nws txoj kev ua tiav rau tom qab dub dub, yog qhov kev kho mob zoo heev thiab tsim nyog, zoo tshaj cov pa roj carbon. Tshwj xeeb tshaj yog nyob rau hauv lub chaw ua khoom ntawm cov xim dawb, xim thiab xim kob roj hmab yog ntau dua. Siv cov roj thaw khoom los yog cov tshuab hluav taws xob, cov roj hluavtaws, cov tshuaj pleev xim tho xim , cov khoom siv xim thootropic cov khoom, thootropic tus neeg saib xyuas, phosphor screen txheej phosphor deposition agent, xim ntawv phaj filling Agent, cast agent. Ntxiv resin, tuaj yeem txhim kho cov khoom ya raws thiab cov khoom hluav taws xob. Puv nyob rau hauv cov khoom yas, yuav ua rau kom lub pob los tiv thaiv thiab anti-roj. Puv nyob rau hauv lub silicone resin, tuaj yeem ua tau rau ntau tshaj 200 ℃ yas. Siv raws li cov khoom nto rau cov fillers thiab cov ntawv nyob rau hauv daim ntawv kev lag luam.
Precipitated dawb cov xim dub: Cov khoom thiab roj hmab thiab ntau yam khoom sib ntxiv yog qhov zoo tshaj plaws, zoo dispersion, dawb thiab dub pob qis tsawg impurities, tsim rau ntau hom looj, kis tau tus kheej, cov khoom siv roj hmab, cov log tsheb, thiab lwm yam.
Cov khoom no yog cov xim ntawm cov roj hmab silicone nrog cov roj av ultra-nplua nuj, thiab cov qib siab thiab cov qauv qis dua ob cov qauv, qhov chaw siab deg, siv cov xim kub ntxhov (vulcanized silicone rubber) Xws li: qhov tseem ceeb, cov pob tshab roj hmab pob tshab, cov nplaum siab thiab siab tsis kub, thiab lwm yam); tsis tshua meej, thaj chaw kub hnyiab hauv chav tsev (xws li: iav kua nplaum, txhuam hniav, thiab lwm yam)
Cov pa roj carbon dawb (hluav taws kub theem ): Cov khoom no tsim nyog rau hluav taws, xws li ABC thiab BC qhuav hmoov ua kom puas, hloov kho, tiv thaiv kom txhob raug phom sij, agglomeration, siab tawm zoo dua
Cov pa roj carbon monoxide (roj hmab rau cov menyuam): Cov nplai thaj ntawm cov khoom yuav ua tau 205 txog 235, tuaj yeem ua ke nrog qhov sib zog ntawm cov khoom muag, 90-95 Shore, yog ntau hom kev lag luam , Cov tub ntxhais kev sib tsho, kev sib kis rau cov menyuam, cov roj hmab tshwj xeeb rubber, thiab lwm yam)
Cov pa roj carbon dawb ( tshuaj tua kab) : Cov khoom no yog siv ua cov hmoov av qhuav, thiab cov khoom ua liaj ua teb muaj kev sib haum xeeb zoo, nrog lub qhov dej tsawg heev ntawm cov tshuaj tua kab, uas tuaj yeem ua kom ntev tso cov kev ua ub no
Cov khoom no yog cov khoom cog khoom zoo tshaj plaws, hmoov granulated granules los ntawm kev tiv thaiv kom tsis txhob muaj av nkos, siv hauv lub log tsheb yuav raug muab pov tseg, tsuas yog rau cov hauj lwm thiab kev lag luam Loaders
Cov tshuaj ntsuab dawb yog siv los siv rau cov khoom siv roj hmab, feem ntau, vim tias muaj cov roj dawb (ultra-fine, qhov kev kho qhov quav) qhov teebmeem tsis yog zoo li cov pa roj carbon, nws yog ib qhov muab cov khoom dub. Yog li, raws li kev siv qhov kev txiav txim siab los hloov qhov feem pua ntawm cov dub dub. Precipitated cov pa roj carbon dioxide rau cov roj hmab, xws li cov tsheb, tsheb npav, tsheb thauj khoom, tsheb laij teb, lub tsheb thaib, thiab lwm yam khoom siv, carbon dub. Ntxiv qhov ntau ntawm silica rau ib lub tsheb ciav hlau zoo tuaj yeem txhim kho lub neej txoj haujlwm ntawm lub log. Raws li tus qauv ntawm Teb Chaws Yelemees qub pib tshawb fawb pom tau hais tias yog qhov nce ntawm 10 mus rau 20 qhov chaw ntawm silica tuaj yeem txhim kho tsevneeg thiab kev tsim kua muag, lub tsheb npav los txhim kho, tab sis kuj txhim kho lub log tsheb ntawm txoj kev Txhob siv lub zog, kom yooj yim tsav tsheb. Tuam Tshoj tus log tsheb yog tsawg tshaj li qhov thoob ntiaj teb, tsis txhob siv silica yog ib qho ntawm cov txheej xwm. Tsis tas li ntawd xwb, vim tias muaj ntau hom carbon cua kub, cov tsheb txawv teb chaws rau cov tsheb loj yuav ntxiv cov roj dawb. Tam sim no cov khoom lag luam thiab kev lag luam nyob rau hauv cov kev cai ntawm cov tsheb kauj vab ntau yog ntau dua, xws li lub log tsheb tis thiab xim nplhaib thiab lwm yam tshiab ntau yam, yog ua los ntawm carbon dub es tsis txhob carbon dub. Cov khoom khau, khau khau, khau khau, khau ntaub, khau khau, khau khiab pob, tsis tas yuav tsum tau ceev nrooj, tab sis kuj xav kom muaj xim zoo nkauj, xis thiab hnav. Cov roj carbon dawb muaj ob qho zoo qhov cuab lub zog, txhwv tsis kam, plam txoj hauj lwm thiab lub nplaum nplaum, tab sis kuj yog ib qho khoom zoo xim dawb lias cov khoom, yog li kev loj hlob ntawm khau nyob rau hauv lub khau muab qhov zoo thiab style Tseem ceeb.
Cov tshuaj dawb dawb hauv polyethylene, polypropylene, polybutene, epoxy resin yuav siv tau ua ib cov ntaub ntawv muab tub lim, ua kom cov yas lub zog muaj zog thiab hnav ua haujlwm, thiab ua kom muaj kev thermal stability. Rau txoj kab nws tseem tuaj yeem txhim kho hluav taws xob rwb thaiv tsev, xws li cov methyl vinyl silicone roj hmab high-voltage kab yuav siv roj-theem silica los yog cov nag zoo ntawm cov roj dawb. Nyob rau hauv ob txheej ntawm yas zaj duab xis yog feem ntau nyuaj cais ntawm lub hnab thaum lub hnab yog qhov nyuaj qhib, ces cov dawb carbon yog qhib nrog tus neeg sawv cev qhib. Thaum lub PVC ua khoom siv hauv tsev, yog tias qhov sib ntxiv ntawm cov roj dawb, koj tuaj yeem txhim kho cov khoom muag, qhov yooj yim, thermal denaturation thiab lwm yam khoom.
Dawb cov ntawv dub ua cov kua nplaum , tuaj yeem txhuam cov ntaub ntawv dawb thiab opacity, paub cov ntawv luam tawm, roj ua haujlwm, txhwv ua haujlwm, xav thiab gloss. Rau cov ntaub ntawv ziab, tuaj yeem ua kom daim ntawv zoo zoo, inkness stability, tsis muaj nrib pleb ntawm sab nraum qab; rau azide ntawv, tuaj yeem tsim daim ntawv zoo zoo; rau cov ntawv tooj liab yuav hloov cov titanium dawb; tshwj xeeb tshaj yog rau cov ntawv xov xwm, ntxiv 1 mus rau 2% ntawm cov roj dawb tuaj yeem txo qhov hnyav ntawm daim ntawv los ntawm 10%, tsis yog tsuas yog ntawv xwb, tab sis kuj ua kom lub zog, ntxiv rau kom tsis txhob muaj tus cwj mem nkag mus, kom cov ntawv luam meej meej, lub opacity.
Silica muaj cov thixotropic cov khoom, nyob rau hauv cov xim muaj xim ntxiv me me ntawm silica, tuaj yeem ua rau txheej kom tshem tawm cov dej quav dej quav dej. Nyob hauv cov xim polyester coatings, ntev li ntawm qhov sib ntxiv ntawm 0.5 mus rau 2% ntawm cov pa dawb, tuaj yeem ua qhov txheej txheem ntawm qhov ntsug ntawm txhua qhov txheej 500g / m2 yuav tsis muaj mob thiab cov ntsws. Ntxiv ntawm silica rau lub pigment tsis tsuas yog tiv thaiv cov nag lossis daus ntawm cov pigment, tab sis kuj pab txoj adsorption ntawm cov xim thiab cov xim thiab pab txoj kev cov dispersibility. Thaum siv los ua ib lub tub luam rau emulsified coatings, thermal stability tuaj yeem kho tau. Yuav kom ua tau raws li cov txheej txheem thiab cov xaum xim matting tus neeg saib xyuas ntawm cov kev cai ntawm silica, txawv teb chaws kev tshawb fawb thiab zus tau khoom ntawm cov neeg muag khoom matting tshwj xeeb. Thaum cov roj ntsha nitrozes thiab cov coatings muaj xws li cov ntxhiab ntawm cov tshuaj tua hluavtaws precipitated, muaj peev xwm ua kom cov xim tsis zoo, thiab muaj peev xwm ua kom yooj yim rau cov dispersant, hnav ua haujlwm. Hauv kev luam ntawv number case los ntawm kev ntxiv 0.5% ntawm cov silica, cov nyhuv luam tawm zoo, tuaj yeem tshem tawm cov teeb meem ntawm cov lej ntawm lub plhu, ua kom cov ntaub ntawv zoo nkauj, ua kom muaj xim ntxiv.
Tsis tas li ntawd, cov roj dawb hauv cov tshuaj tua kab, tshuaj, tshuaj nplaum, tshuaj txhuam hniav thiab tshuaj pleev ib ce txhua hnub kuj muaj ntau yam kev sib txawv ntawm kev siv thiab ua si ntau yam zoo.