MarkeTech Silica Aerogel

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MarkeTech Silica Aerogel (discontinued **)
Categories:	Ceramic; Aerogel; Oxide; Silicon Oxide
Material Notes:	Silica aerogels are generally known for being an extremely lightweight transparent solid with excellent thermal insulating properties, high temperature stability, very low dielectric constant, and extremely high surface area. Some applications have included atomic particle detectors and super insulation for aerospace applications and they were used to insulate the Mars rover. MarkeTech International standard silica aerogel is formed into translucent monolithic blocks with carefully controlled densities. Data provided by the supplier, MarkeTech International. MarkeTech International is no longer in business.
Key Words:	SiO2; Silicon Oxide; Silicon Dioxide
Vendors:	No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Metric	English	Comments

Density	0.100 g/cc	0.00361 lb/in³	typical
	0.0500 - 0.300 g/cc	0.00181 - 0.0108 lb/in³	Available range
Solids Content	0.5 - 14 %	0.5 - 14 %
Particle Size	0.0020 - 0.0050 µm	0.0020 - 0.0050 µm	Primary Particle Size
Specific Surface Area	800 m²/g	800 m²/g
Pore Size	0.0200 microns	0.000787 mil	mean diameter

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	0.0160 MPa	2.32 psi
Modulus of Elasticity	0.00100 - 0.0100 GPa	0.145 - 1.45 ksi	Youngs Modulus
Compressive Modulus	0.000300 GPa	0.0435 ksi
Poissons Ratio	0.24	0.24
Fracture Toughness	0.000800 MPa-m½	0.000728 ksi-in½
Shear Modulus	0.000420 - 0.00417 GPa	0.0609 - 0.605 ksi	Calculated

Electrical Properties	Metric	English	Comments
Electrical Resistivity	1e+15 ohm-cm	1e+15 ohm-cm
Dielectric Constant	1.14 @Frequency 1.80e+10 - 4.00e+10 Hz	1.14 @Frequency 1.80e+10 - 4.00e+10 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	2.00 µm/m-°C @Temperature 20.0 - 80.0 °C	1.11 µin/in-°F @Temperature 68.0 - 176 °F
Thermal Conductivity	0.00400 W/m-K	0.0278 BTU-in/hr-ft²-°F	In Vacuum
	0.0160 W/m-K	0.111 BTU-in/hr-ft²-°F	In Air
Maximum Service Temperature, Air	500 °C	932 °F	Thermal Tolerance

Optical Properties	Metric	English	Comments
Refractive Index	1.002 - 1.063	1.002 - 1.063
Transmission, Visible	90 %	90 %	visible; thickness not quantified

Descriptive Properties
Color	Transparent
Mean Pore Diameter	20 nm
Solids	0.13 - 15%
Sound Velocity	100 m/sec

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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