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low NaO alumina bubble

  • AL2O3(%) : 99.50%MIN
  • Sio2(%) : 0.15%MAX
  • Fe2O3(%): 0.05%MAX
  • Bulk density : 0.5-1.0g/cm3
  • Working temp: 1800 ℃
  • Main phase : α-AL2O3
  • low NaO alumina bubble
 YuLi low NaO alumina bubble is hard but friable with respect to its pressure strength. The melting point is around 2100℃。 Due to its hollow spheres, YuLi bubble alumina has low bulk density which is 0.5-1g/cm3 and extremely low thermal conductivity, low impurity.

As lightweight refractory, Yuli Low Nao alumina bubble is designed for special requirments due to its low impurity.

■Typical Chemical
Model Specification White Bubble Alumina (WBA)
Al2O3 99.5% Min
SiO2 0.15% Max
Na2O 0.15% Max
Fe2O3 0.05% Max
Working temp 1800 ℃
Bulk density 0.5-1 g/cm3
Main phase α-Al2O3
Packing In 20 KGS or 25 KGS bags + Big bag


The regular size are 0.2-1,1-2,2-3,3-5mm, other size are available according to your requirements.  

Package: In 20KGS or 25KGS BAG+ BIG BAG or as your requirements.
Delivery time: 10-15 business from the receipt of payment. 
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