项   目 

        性   能  指   标 

LZ-80

LZ-75

LZ-65

LZ-55

LZ-48

    Al2O3 ,%

80

≥75

≥65

≥55

≥48

                                    耐火度℃

≥1790

≥1790

≥1790

≥1770

≥1750

                 体积密度,g/cm3

2.65

2.5

2.45

2.4

2.3

                         0.2 Mpa荷重软化开始温度/℃

1530

≥1520

≥1500

≥1470

≥1420

重烧线变化,%

1500℃X2H

+0.1

-0.4

+0.1

-0.4

+0.1

-0.4

+0.1

-0.4

1450℃X2H

+0.1

-0.4

                          显气孔率,%    

22

≤23

≤23

≤22

≤22

       常温耐压强度,Mpa   

55

≥50

≥45

≥40

≥35

   用  途

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