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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	0.0160 MPa
Modulus of Elasticity	0.00100 - 0.0100 GPa	Youngs Modulus
Compressive Modulus	0.000300 GPa
Poissons Ratio	0.24
Fracture Toughness	0.000800 MPa-m½
Shear Modulus	0.000420 - 0.00417 GPa	Calculated

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

Thermal Properties	Original Value	Comments
CTE, linear	2.00 µm/m-°C @Temperature 20.0 - 80.0 °C
Thermal Conductivity	0.00400 W/m-K	In Vacuum
	0.0160 W/m-K	In Air
Maximum Service Temperature, Air	500 °C	Thermal Tolerance

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

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

**
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