Thaum ntau tus neeg siv khoom nug txog tus nqi ntawmlub raj mis iav, qee tus neeg yuav xav tsis thoob tias vim li cas tus nqi thiaj txawv rau cov fwj iav uas muaj tib qhov hnyav thiab tus qauv. Qhov tseeb, qhov sib txawv yog nyob rau hauv qhov zoo ntawm cov khoom siv raw siv rau cov fwj iav. Feem ntau pom cov fwj iav soda-lime siv cov khoom siv rov ua dua tshiab ntau dua hauv cov txheej txheem tsim khoom, thaum cov mis rau cov iav dawb siab thiab cov iav dawb siv lead ua muaj cov khoom siv rov ua dua tshiab tsawg dua. Yog li ntawd, tus nqi ntawm cov khoom siv raw rau cov fwj iav no siab dua li cov fwj iav soda-lime, ua rau tus nqi siab dua rau cov khoom tiav. Qee tus neeg yuav tsis nkag siab qhov sib txawv ntawm cov iav dawb siab thiab cov iav dawb siv lead ua.
Ua ntej tshaj plaws, hais txog cov xim ntawm lub raj mis iav, cov iav dawb siab muaj qhov pom tseeb thiab xim zoo dua li cov iav dawb siv lead ua, thaum cov xim thiab kev xa tawm ntawm cov iav dawb siv lead ua yeej zoo ib yam li cov iav dawb siab. Qhov zoo ntawmsiv lead ua dawb iavyog tias nws muaj qhov ceev ceev thiab qhov ntsuas refractive. Cov qauv rau ob hom iav no kuj txawv. Cov iav dawb siab xav tau kev xaiv cov feldspar siab, tsis muaj kuab paug thiab xuab zeb quartz, thaum cov iav dawb siv lead ua feem ntau yog ua los ntawm quartz thiab silicon dioxide ua cov ntaub ntawv tseem ceeb thiab cov khoom siv pabcuam, feem, thiab tom qab ntawd ua tiav. Cov txheej txheem tsim khoom rau ob yam khoom no kuj txawv. Cov iav dawb siab feem ntau yog tshuab tsim hauv Suav teb, thaum cov iav dawb siv lead ua feem ntau yog tes tsim. Cov ntaub ntawv raw siv rau lub raj mis iav sib txawv, ua rau muaj kev ua haujlwm sib txawv rau cov khoom tsim tawm.
Lub sijhawm tshaj tawm: Lub Xya Hli-17-2023