Bismuth Oxide
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Glass & Ceramic Chemicals
Bismuth oxide has the following functions in ceramics. Glaze flux: Bismuth oxide is used as a flux in ceramic glaze, reducing the firing temperature and improving the gloss and transparency of the glaze.
Colorant: Used to make yellow and green glazes to improve the color brightness and stability of the glaze.
| CAS No. |
1304-76-3
|
| Molecular Formula |
Bi2O3
|
|
HS code
|
2825902100
|
| Item | Spec. | Typical Value |
| Bi2O3 | 99.9% Min | - |
| Total metallic | 0.1% Max | - |
| Bi | 89.3 Min | 89.5% |
| Fe | - | 10 ppm |
| Na | - | 10 ppm |
| Pb | - | 10 ppm |
| SO42- | - | 3 ppm |
| Cu | - | 5 ppm |
| Loss on drying | 0.1% max | 0.05% |
| Appearance | Yellow powder |
| Bulk density | 2.5~4.0 g/cm³ |
| Particle Size: D50 | 45μm |
| Tapped density | 4.5~6.0 g/cm³ |
Bismuth oxide has a high refractive index, which can enhance the gloss and transparency of the glaze.
Relatively environmentally friendly, bismuth and its compounds are non-toxic.
Chemically stable at high temperatures.
