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 Shieldwerx
SWX-237
High Temperature Boron Silicone Neutron
Shielding
Features
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A field-castable multi-part
kit that is also available as custom-made pre-cast solid pieces
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Contains 1% boron along with a
high hydrogen content in a hard rubber-like elastomer
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Fire and heat resistant
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To cast 1 cubic foot of
SWX-237 requires 97 pounds of Boron Silicone mix (1 liter requires 1.59
kilograms of Boron Silicon mix)
Introduction
SWX-237 Boron Silicone is a fire- and heat-resistant
field-castable neutron radiation shielding material. It is silicone elastomer
based and has a high hydrogen content. At temperatures up to 400 °F (204.4 °C),
it will retain almost 90% of it hydrogen for extended periods. The hydrogen
content of SWX-237 is 67% of that found in water and contains 1% boron for
thermal neutron attenuation.
SWX-237 is available in a variety of shapes and sizes. It
has a hard rubber-like consistency that will minimize any impact due to
secondary missile formation and is self-extinguishing. SWX-237 Boron Silicone can be provided as a multi-part kit
that is castable in the field or as pre-cast solid pieces made to your
specifications. Recommended shelf-life of the mix kit is six months.
Specifications
Composition Data
Hydrogen atom density / cm3: 4.49 x 1022
Natural isotope distribution: 99.98 % 1H
Boron atom density / cm3: 9.4 x 1020
Natural isotope distribution: 19.6 % 10B and 80.4 % 11B
Weight percent of all isotopes of boron: 1.06 %
Total Density: 1.59 g / cm3 (99 lbs. / ft3)
Radiation Properties
Macroscopic thermal neutron cross section: 0.71 (cm-1)
Gamma resistance: 1 x 1010rad
Neutron resistance: 5 x 1018 n / cm2
Physical Properties
State: Liquid mix or pre-cast solid
Color: Dark Grey
Odor: No significant odor
Machinability: Fair
Hardness: Shore "A" Durometer Scale = 66
Tensile Strength (ASTM D368): 50 psi
(35,155 kg / m3)
Compressive Strength: 450 psi (316,395 kg /
m3)
Thermal Properties
Recommended Temperature Limit: 400 °F (204.4 °C)
Heat Capacity: 0.4 cal /
g °C
Cubical Coefficient of
Expansion: 3 x 10-4 in3 / in3 °F (5.4 x 10-4
cm³ / cm³ ° C)
Linear Coefficient of
Expansion: 1 x 10-4 in / in °F (1.7 x 10-4 cm / cm °C)
Vapor Pressure (mm Hg):
5
Evaporation Rate (ether=1): <1
Chemical Properties
Chemical Name & Synonyms: Borated Silicone
Trade Name & Synonyms: SWX-237
Chemical Family: Silicone Monomer
Formula: Mixture of silicone plus boron
compound
Solubility in Water: <1 %
Technical Information
Other Shieldwerx Shielding Products
For more information or to request a quotation,
please contact us
by phone at: (865)
947-5123 or by email at:
sales@deqtech.com.
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