Phosphors
Phosphors
are fine white powders which fluoresce when suitably excited. Many of them
are ceramics and can withstand extremely high temperatures.
The fluorescence characteristics change with temperature and thus a
phosphor coating may indicate the temperature of the surface onto which it
is coated. Seen here is a tensile specimen coated with phosphor and
illuminated with a black light so that the stripes of phosphor glow red.
There are a wide variety of ceramic phosphors which fit these
characteristics:
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Survives hazardous
chemical environments. |
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Not water soluble. |
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Durable. |
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Easy to apply.
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The white stripes of phosphor on this metal
specimen glow red when illuminated by a black light. Some
phosphors have no trouble surviving and functioning in
high temperatures such as those produced by this
propane torch.
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