体积密度（kg/m 3）volume density

120±5

130±5

纤维直径（im）fiber diameter

2.4

2.4

**线收缩率(%)permanent line contraction rate

保温24小时

preserve the temperature for 24 hours

-4

-3.9

(1000℃)

(1000℃)

渣球含量（%）shot content＞0.25mm

10.2

10.5

各热面下导热系数(w/m.k)

the heat conductivity under each hot surface

0.034(20℃)

0.034(20℃)

0.096(400℃)

0.096(400℃)

0.132(600℃)

0.132(600℃)

备注：以上数据按国家规定的方法测得。remarks: the above data gained according to the method prescribed by the state.