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Vim li cas iav thiaj muaj npuas
Feem ntau, cov ntaub ntawv raw ntawm iav raug rho tawm haujlwm ntawm qhov kub ntawm 1400 ~ 1300 ℃.Thaum lub khob nyob rau hauv lub xeev ua kua, cov huab cua nyob rau hauv nws tau ntab tawm ntawm qhov chaw, yog li muaj ob peb los yog tsis muaj npuas.Txawm li cas los xij, feem ntau ntawm cov iav cam khwb cia yog raug rho tawm haujlwm ntawm qhov kub qis ...Nyeem ntxiv -
Kev tsom xam cov khoom siv iav
Cov khoom tseem ceeb ntawm cov iav xim yog purified quartz xuab zeb thiab potassium feldspar, albite, lead oxide (cov ntsiab lus ntawm iav), ntsev (potassium nitrate: KNO3; txias), alkali hlau, alkaline ntiaj teb hlau (magnesium chloride: MgCl, melting pab. , nce durability), aluminium oxid...Nyeem ntxiv
