Alumina Silicate Ceramic

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Shape

System of Measurement

Thickness

Diameter

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Length

Maximum Temperature

Thermal Conductivity @ Temperature

1.265 W/(m⋅°C) @ 20° C

Color

Gray

Minimum Temperature

0° F to 99° F

Fabrication

Unfired

Porosity

Clarity

Compressive Strength

Density

Hardness

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Tensile Strength

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DFARS Specialty Metals

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Export Control Classification Number (ECCN)

EAR99

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44 Products

About Composites

Compare our offering of composites to find the right material for you.

Low Thermal Expansion Alumina Silicate Ceramic Sheets and Bars

Also known as lava and wonderstone, this material is often used in applications that require high temperature resistance and low thermal expansion, such as standoffs and welding jigs.

Sheets

			Temp., ° F							4" × 4"		6" × 6"		9 1/2" × 9 1/2"
Thk.	Thk. Tolerance	Color	Min.	Max.	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	1/8"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	0000000	000000	00000000	0000000


	1/4"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	0000000	000000	00000000	000000
	3/8"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	0000000	000000	00000000	000000
	1/2"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	0000000	000000	0000000	000000
	3/4"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000
	1"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000
	1 1/2"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000
	2"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000

Bars

			Temp., ° F							1/2" × 6"		3/4" × 6"		1" × 6"		2" × 6"
Thk.	Thk. Tolerance	Color	Min.	Max.	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each		Each



	1/2"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	———	0	———	0	———	0


	3/4"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	000000	———	0	———	0
	1"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000	———	0
	2"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	———	0	0000000	0000000

Low Thermal Expansion Alumina Silicate Ceramic Rods

Also known as lava and wonderstone, this material is often used in applications that require high temperature resistance and low thermal expansion, such as standoffs and welding jigs.

			Temp., ° F							3" Lg.		6" Lg.		9 1/2" Lg.
Dia.	Dia. Tolerance	Color	Min.	Max.	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	1/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	———	0	———	0


	1/4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	———	0	———	0
	3/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	000000	———	0
	1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	00000	———	0
	5/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	00000	———	0
	3/4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	7/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	00000
	1"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	1 1/4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	1 1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000


	2 1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	3"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	3 1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	00000000	00000000
	5"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	00000000