SPI-Chem™ P-47 Scintillator Powder
Making your own scintillators for SEM appplications
We find that much to our surprise, a lot of end users seem to be fascinated
with scintillator technology and wish to make their own coatings. So we
have responded to that demand by offering as a powder the very same powder
that is used in the making of what really has become famous in terms of
reputation, namely, the
SPI Supplies line of SEM scintillators.
Recipes are imprecise and there seems to be a number of variations to this
basic standard recipe. So it should be viewed as a general starting point,
if it works at this point, then consider yourself lucky but if it does not
work the first time, you will just have to use trial and error to ultimately
get the desired coating.
Materials needed:
Procedure:
1] A small amount of the SPI-Chem™ P-47 Scintillator Powder is
suspended in methyl alcohol. This is then dropped by pipette onto
the glass surface to be coated.
2] The substrate glass is then gently shaken to produce a nice looking
uniform coating of the phosphor.
3] Following evaporation of the excess methyl alcohol, the coated glass is
then baked in an oven at 200°C for at least 12 hours.
4] Spray a thin layer of binder (like sodium silicate in water) on the P47
coating. This will hold the particles in place and reduce the chances of
peeling or movement of the coating while it is being irradiated.
We are not able to give assistance beyond this. SPI Supplies employs
proprietary technology for the application of scintillator coatings to
surfaces. When all else fails, consider purchasing
one of our off-the-shelf SEM scintillators.
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Friday July 04, 2008
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