AT，BT莫来石—炭化硅砖

AT

BT

0.2MPa荷重软化开始温度,℃          不低于

1550

1550

体积密度，g/cm³                     不小于

2.50
(2.50~2.80)

2.50
(2.50~2.80)

显气孔率,%                          不大于

21

21

重烧线变化，%  1350℃X2h

+0.1 –0.5

+0.1 -0.5

常温耐压强度，Mpa                    不小于

85

85

热震稳定性，次   1100℃ 水冷         不小于

40

50

抗折强度，Mpa? 1100℃, 0.5h         不小于

20

_

SiC，%                               不小于

30

40

Al₂O₃ ，%                            不小于

35

30

Fe₂O₃ ，%                            不大于

1.0

1.2