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Item # RSPB, RSPB (2000ºF+ Low Expansion 99% Silica Matrix Composite Board)



Refractory Sheet Press Board (RSPB) is a silica matrix composite produced from low thermal expansion raw materials consisting of 99.7% silica. These rigid high strength fiber reinforced structural ceramic composites have a thermal expansion coefficient of .3 x 10-6/ºC which provides remarkable resistance to thermal shock up to 1200ºC (2192ºF). Beyond 1200ºC (2192ºF) it begins to transform into a crystalline structure, but maintains it’s properties up to 1650ºC (3002ºF) providing that there is no significant drop in temperature. At these elevated temperatures, RSPB will exhibit surface glazing, but will retain it’s strength and integrity.
Mechanical properties of Refractory Sheet Press Board exceed those of high temperature calcium silicate as well as many other structural insulation materials. RSPB is 100% inorganic, contains no refractory ceramic fibers (RCF’s), and undergoes little or no outgassing on heating. It also exhibits exceptional non-wetting properties when used in contact with molten aluminum, zinc, lead, tin, and other non-ferrous metals.





Specifications  · Note

Specifications

Coefficient of Thermal Expansion at (Room Temp. to 800ºC)

0.3 x 10-6/Per ºC

Nominal Composition

Al2O3 - 0.10%
Fe2O3 - 0.03%

MgO - 0.03%

Na2O - 0.05%

Organics - 0%

SiO2 - 99.7%

Organics

0 %

Density

2.1 g/cc
90
lb/ft³

Porosity

31 %

Color

White

Hardness, Durometer “D”

87

Charpy Impact Strength

0.8 ft.lb

Compressive Strength at 2% Consolidation

View
48 MPa
7000
psi

Modulus of Rupture

View
30 MPa
4300
psi

Maximum Service Temperature (Cyclic Conditions)

1200 ºC
2192
ºF

Maximum Service Temperature (Non-Cyclic)

1650 ºC
3002
ºF

Linear Shrinkage, 24 hrs. at 800ºC (1472ºF)

View
0.1 %

Linear Shrinkage, 24 hrs. at 1000ºC (1832ºF)

View
1 %

Thermal Conductivity at 200ºC (392ºF)

View
0.54 BTU-in/hr-ft²-ºF
3.8
W/m-ºK

Thermal Conductivity at 400ºC (752ºF)

View
0.64 BTU-in/hr-ft²-ºF
4.4
W/m-ºK

Thermal Conductivity at 600ºC (1112ºF)

View
0.61 BTU-in/hr-ft²-ºF
4.2
W/m-ºK

Thermal Conductivity at 800ºC (1472ºF)

View
0.67 BTU-in/hr-ft²-ºF
4.6
W/m-ºK

Thermal Conductivity at 1000ºC (1832ºF)

View
0.75 BTU-in/hr-ft²-ºF
5.2
W/m-ºK

Volume Resistivity

7.5 x 109 ohm-cm

Dielectric Strength

43 V/mil

Sheet Size

24 x 36 in
36 x 48
in

Thickness

1/8 to 3 in

Availability

Moldable Sheet
Tube


Note
Maximum use temperature is dependent on variables such as thermal & mechanical stress, and the chemical environment the material is subjected to.



 MORE IMAGES 

·  Refractory Composites


 DOWNLOADS 

Data Sheet for RSPB (2000ºF+ Low Expansion 99% Silica Matrix Composite Board)
(PDF, 11KB)


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