17 years ago
I'm looking for a relatively thin electrically-resistive sheet material.
The resistivity I need depends on the thickness I can get. Basically I need
for the resistivity to be somwhere near
rho = .24 / t
where rho is the resistivity in ohm-m and t is the thickness of the sheet in
meters. I would like for it to be thin enough to be flexible in large
sheets (say, measured in square meters). Here are the corresponding
resistivities for some nominal inch thicknesses:
.031 in ---> 300 ohm-m
.062 in ---> 150 ohm-m
.125 in ---> 75 ohm-m
.188 in ---> 50 ohm-m
Are any of you aware of a material that meets these specs (or is close) that
is not extremely expensive? I have seen graphite-impregnated plastics that
could work well, but only in McMaster-Carr, which has a limited selection.
The material must be uniformly resistive throughout its cross section (not
just surface conductive).
Thanks for any replies.