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Microporous Silica Insulating Boards (Mintherm / Microtherm 1925ºF Grades)



MINTHERM BOARD 1925 is a microporous insulating board that offers exceptionally low thermal conductivity (lower than dormant air). Each board is individually encapsulated in polyethylene foil to make it resistant to moisture.




Physical Properties  · Thermal Conductivity  · Chemical Properties  · Specifications  · Applications

Physical Properties

Color

White

Maximum Use Temperature

1925 ºF
1050
ºC

Density

18.7 lb/ft³
300
kg/m³

Compressive Strength (Tube)

145 to 435 psi
1 to 3
N/mm²

Hot Compressive Strength at 1300ºF (700ºC)

217.5 psi
1.5
N/mm²

Flexural Strength

17.4 psi
0.12
N/mm²

Permanent Linear Change

After 24 hours at 1500 ºF (800 ºC) - (- 0.3 %)
After 24 hours at 1742 ºF (950 ºC) - less than 1.5 %

Specific Heat

1.05 kJ/kgK (400ºC)

Standard Dimensions

19.68" (0.5 m) long x 23.62" (0.6 m) wide
39.37" (1.0 m) long x 23.62" (0.6 m) wide


Thermal Conductivity

Thermal Conductivity at 392ºF (200ºC)

0.15 BTU-in/hr-ft²-ºF
0.022
W/m-ºK

Thermal Conductivity at 752ºF (400ºC)

0.17 BTU-in/hr-ft²-ºF
0.025
W/m-ºK

Thermal Conductivity at 1472ºF (800ºC)

0.27 BTU-in/hr-ft²-ºF
0.040
W/m-ºK


Chemical Properties

Chemical Composition

Al2O3 - <1%
SiO2 - 72%

ZrO2 - 27%


Specifications

Available Thickness

0.39 in
0.59
in
0.78
in
1
in
1.18
in
1.57
in
1.96
in
10
mm
15
mm
20
mm
25
mm
30
mm
40
mm
50
mm


Applications
Aluminum Industry
Ladle Insulation
Reduction Cell Insulation
Trough & Runner Insulation
Melting Furnace Insulation
Holding Furnace Insulation

Glass Industry
Forehearth Insulation
Feeder Bowl Insulation
Feeder Bowl Covers
Orifice Ring Insulation
Tank Wall Insulation
Recuperator Insulation

Steel Industry
Coke oven door insulation
Convertor Insulation
Ladle Insulation
Tuyer Stock Insulation
Tundish Insulation
Bussel Main Insulation
Iron Runner Insulation



 DOWNLOADS 

Data Sheet for Microporous Silica Insulating Boards (Mintherm / Microtherm 1925ºF Grades)
(PDF, 60KB)


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