insulating bricks for oven

LBK23

LBK26

LBK28

LBK30

Bulk density (g/cm3)

≤0.55

≤0.68

≤0.75

≤0.85

Cold crushing strength  Mpa

≥1.0

≥1.5

≥2.0

≥2.5

MOR  MPa

≥0.8

≥1

≥1.2

≥1.5

Permannet linear change

%

±0.3

1300×5 h

±0.3

1400×5h

±0.3

1500×5h

±0.3

1550×5h

Thermla conductiv-ity

w/m.k

≤

600

0.21

0.27

0.29

0.32

800

0.23

0.29

0.31

0.34

1000

0.25

0.31

0.33

0.36

1200

0.27

0.33

0.35

0.38

Chemical

Analysis

(%)

Al₂O₃

42.09

50.2

56.92

65.32

SiO₂

52.93

46.45

40.11

32.68

Fe₂O₃

0.8

0.71

0.62

0.50

CaO

1.20

0.6

0.53

0.40

MgO

0.3

0.27

0.26

0.15

Na₂OK₂O

1.05

0.84

0.82

0.6

TiO₂

1.1

0.63

0.65

0.31