Here is some relevant data to consider for selecting materials. This is transcribed from Excel. If there is a [?] next to a number it means there were conflicting numbers on the internet.
[Henrys/Meter] [Watts/Meter*Kelvin] [Kelvin] [$/Kg] [Siemens/Meter] [electron-volts]
Relative Magnetic Permeability: Thermal Conduct: Melting Point: Price: Electrical conduct: Threshhold Energy For Nuetrons:
Aluminum 9.995E-01 237 933 $2.19 3.5E 7 < 8.00E+5
316 Stainless Steel 1.02 ?? 15.16 1672 $0.91 1.3E+06 < 1.00E-4
Molybdenum 1.000E+00 138 2896 $29.00 1.7E+07 < 1.00E+05
Neodymium 1.003E+0? 16.5 1297 $340.00 1.6E+06 1.00E+04
Teflon 9.995E-01? 0.25 600 $20.55 1E-25 to 1E-23 < 1.00E-4
Tungsten-Carbide 1.000E+00 84.02 3143 $0.48 5.0E+06 < 1.00E-4
Graphite 1.600E+00 112 3925 $2.75 1.4E+05 < 1.00E-4
silicon carbide 1.000E+00 3.6 3003 $8.81 1.0E-06 < 1.00E-4
Boron 1.000E+00 27.4 2349 $2,000.00 5.0E-02 <1.00 E-5
Note: The presence of carbon lowers many of these materials’ threshold for activation by neutrons and the relative magnetic permeability is calculated for near 20C.
Sources:
http://www.northerngraphite.com/index.p ... ite-price/
http://biotsavart.tripod.com/bmt.htm
http://www.metal-pages.com/metalprices/neodymium/
http://www.azom.com/article.aspx?ArticleID=863
http://physics.info/conduction/
http://www.memsnet.org/material/tungstencarbidewcbulk/
http://aries.ucsd.edu/LIB/PROPS/PANOS/c.html
http://www.chemicool.com/elements/boron.html
http://www.imoa.info/molybdenum/molybde ... erties.php
http://www.chemicool.com/elements/molybdenum.html
http://hypertextbook.com/facts/2004/Afr ... rave.shtml
http://www.reade.com/Particle_Briefings ... ities.html
http://hyperphysics.phy-astr.gsu.edu/hb ... gprop.html
http://www.wolframalpha.com/input/?i=bo ... eptibility
http://www.wolframalpha.com/input/?i=ne ... ptibility-
www.wikipedia.com