Vim nws cov nplua nuj ntau yam, iav tuaj yeem siv rau ntau lub sijhawm, yog li nws muaj kev cia siab dav thiab tau txais kev hlub los ntawm cov neeg siv khoom. Thaum peb xaiv iav, ntxiv rau kev saib xyuas nws tus nqi, peb kuj yuav tsum tau them sai sai rau cov khoom sib txawv ntawm ntau hom iav, uas yog tsim nyog rau lawv tus kheej siv. Txhawm rau pab koj nkag siab cov yam ntxwv thiab kev ua haujlwm ntawm cov iav raj, nrog rau ntau hom iav melting kilns, peb tau sau cov ntaub ntawv thiab sau tsab xov xwm no, vam tias yuav pab tau.
Dab tsi yog iav raj
Cov iav raj yog ib yam ntawm cov raj tsis yog xim hlau, uas yog ib hom iav nrog sodium oxide (Na2O), boron oxide (B2O3) thiab silicon dioxide (SiO2) ua cov khoom siv hauv paus. Nws cov kev ua tau zoo tau raug lees paub los ntawm txhua qhov chaw ntawm lub neej nyob hauv lub ntiaj teb, piv nrog cov iav zoo tib yam, tsis muaj kev phom sij, nws cov khoom siv hluav taws xob, thermal stability, dej tsis kam, alkali tsis kam, acid tsis kam thiab lwm yam khoom muaj txiaj ntsig zoo tuaj yeem ua kom dav. siv hauv kev lag luam tshuaj, aerospace, tub rog, tsev neeg, tsev kho mob thiab lwm yam kev lag luam, nrog rau kev txhawb nqa zoo thiab cov txiaj ntsig zoo. Cov tsos ntawm cov iav zoo li no hauv peb lub teb chaws yog lwm qhov kev hloov pauv tshiab hauv kev lag luam khoom siv yooj yim.
Cov iav raj feem ntau tuaj yeem muab faib ua plaub hom:
1. Cov raj iav zoo tib yam, xws li kev siv hauv chav kuaj;
2. Tshuaj iav raj, feem ntau ua los ntawm boron iav nrog zoo thermal stability thiab corrosion kuj. Pob tshab, yooj yim los ntxuav, tsis tshua muaj dej tsis kam, tus nqi qis. Tab sis tsis tshua muaj siab tsis kam, yooj yim rau kev puas tsuaj. Nws tuaj yeem siv rau -30 ~ +130 degree , thiab qhov kub tsis tshaj 80 degree .
3. Neutral iav raj
4. High borosilicate iav raj