Peb tuaj yeem faib nws raws li nws siv thiab thev naus laus zis. Raws li cov txheej txheem, peb faib cov iav mus rau: nyem iav, siv lead ua xim iav, xim iav, tempered iav, forged iav, laminated iav, thiab lwm yam. nrog lub thickness ntawm 3 cm yog tsuas yog siv rau saum npoo ntawm daim duab ncej. (2) Rau qhov rais, qhov rooj nplooj thiab lwm yam pob tshab, peb feem ntau siv 5cm iav. (3) Rau cov ntxaij vab tshaus nrog thaj tsam loj, 8 cm iav yog siv rau cov neeg uas muaj cheeb tsam loj. (4) Txawm li cas los xij, rau qee yam khoom siv iav nrog lub thickness ntawm ntau tshaj 9 cm, lawv feem ntau yuav tsum tau kho kom haum rau cov partitions, kho kom zoo nkauj, iav qhov rooj thiab lwm qhov chaw loj.
Raws li kev faib tawm ntawm iav, peb tuaj yeem faib cov iav muaj pes tsawg leeg rau hauv (1) quartz iav. Quartz iav muaj zog cua sov degree, qis expansion coefficient, siab viscosity thiab nyuaj ua. Yog li ntawd, cov yam ntxwv no feem ntau yog siv rau hauv lub teeb ci, kev sib txuas lus, semiconductor thiab lwm yam thev naus laus zis. (2) Soda txiv qaub iav yog tsim los ntawm silica, uas yog siv nyob rau hauv qhov muag teev, ntsuas kub, combustion tubes, thiab lwm yam.