Txhais ntawm borosilicate iav

Cov txheej txheem thoob ntiaj teb ISO 4802. 1-1988" Dej tsis kam ntawm sab hauv ntawm iav thiab iav ntim Ntu 1: Kev txiav txim siab thiab kev faib tawm los ntawm titration" Txhais cov iav borosilicate (suav nrog cov iav nruab nrab) raws li muaj cov diboron trioxide (B -2O-3) 5 ~ 13% (m / m) ntawm iav, tab sis ISO 12775" Kev faib tawm ntawm iav Cov Txheej Txheem thiab Kev Ntsuas Cov Txheej Txheem rau Kev Loj Hlob Qhuav" tso tawm xyoo 1997 txhais cov iav borosilicate (xws li iav nruab nrab). Boron trioxide (B-2O-3) yog ntau dua 8% (m / m). Raws li lub hauv paus ntsiab lus ntawm kev faib iav hauv xyoo 1997 cov qauv thoob ntiaj teb, B-2O-3 6% (m / m) iav khoom siv dav hauv kuv lub teb chaws' s tshuaj iav raj mis kev lag luam rau ntau xyoo yuav tsum tsis txhob raug hu ua borosilicate iav los yog iav nruab nrab. Cov kev ntsuam xyuas tau ua pov thawj tias qee qhov ntawm cov iav particle dej tsis kam thiab cov dej hauv qhov dej tsis zoo ntawm cov khoom siv no tsis yog nyob rau hauv Chav Kawm 1 thiab HC1, lossis nyob rau ntawm ntug ntawm Chav Kawm 1 thiab 2. Kev xyaum kuj tau ua pov thawj tias qee qhov ntawm no hom iav yuav muaj nruab nrab tsis ua hauj lwm los yog tev thaum siv, tab sis hom iav no tau tsim thiab siv nyob rau hauv kuv lub teb chaws tau ntau xyoo. Tus qauv tshiab khaws cov khoom siv ntawm cov iav no thiab teev nws cov B-2O- Cov ntsiab lus ntawm 3 yuav tsum ua tau raws li qhov yuav tsum tau muaj ntawm 5-8% (m / m), uas txhais tau meej tias hom iav no tsis tuaj yeem hu ua borosilicate iav (lossis nruab nrab. iav), thiab nws yog lub npe hu ua low borosilicate iav.

Cov khoom siv iav: Muaj 4 hom iav hauv cov qauv tshiab, suav nrog 2 hom iav borosilicate iav, suav nrog 3.3 borosilicate iav [α=(3. 3 ± 0. 1) × 10 (-6) K(-1)] Thiab 5.0 neutral iav [α= (4～5) × 10 (-6) K(-1)], low borosilicate iav [α= (6.2～7.5) × 10 (-6) K(-1) ]1 yam , soda txiv qaub iav [α= (7.6～9.0) × 10 (-6) K(-1)]l hom, yog li muaj 4 hom iav raws li cov khoom siv