Indicator           

        Stability

Semi-stability

ZrO2+HfO2   %

≥94

≥94

CaO2            %

4.5~5.5

3.5~4.5

SiO2             %   

<0.2

<0.5

Fe2O3          %  

<0.2

<0.4

Al2O3           %  

<0.2

<1.0

Long-period serving temperature  °C

2200

2200

Refractoriness    °C

~2500

~2500

Stability         %

100

70-85

Granularity   mm

Based on customer′s requirements