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can you 'shine' candoluminescent materials coated on metals with induction?

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spec:

--- Quote from: rs20 on January 21, 2019, 09:38:29 am ---
--- Quote from: coppercone2 on January 19, 2019, 01:55:25 am ---It's not direct conversion of heat into light?

--- End quote ---

I thought nothing could convert heat into anything else. Some law of thermodynamics?

A heat difference between two reservoirs can be converted to more useful forms of energy (Sterling cycle, etc), sure, but not just heat in one place like you'd be claiming here.

--- End quote ---
  I think heated material naturally converts heat to EM radiation, the frequency being proportional to the temperature.

coppercone2:
the (partial?) explanation is here:
https://en.wikipedia.org/wiki/Candoluminescence

What is interesting me now is the idea of a minimum-fuel candoluminescence phenomena. If you get something hot enough, can you pass low gas flow/reduced pressure gas flow past the hot object to get the candoluminescent reaction?

A experiment might be to take a light bulb apart, dust the filament in YO2 powder (mesh size?), and put it back together in a modified vacuum chamber and add various gasses to the chamber to see if the light output changes? then play with vacuum level, gas concentration and filament power.

I actually don't know what a oxy-gas mixture does at reduce pressure. Will the light bulb explode? maybe you can get a non flame concentration going that still forms radicals? then the nature of the chemical reactions can be explored carefully.

the other idea might be some kind of super bright flare.

T3sl4co1l:

--- Quote from: rs20 on January 21, 2019, 09:38:29 am ---I thought nothing could convert heat into anything else. Some law of thermodynamics?

--- End quote ---

Heat is converted directly into light and vice versa, as black body radiation; the stipulation is that it must be in thermal equilibrium, so you aren't going to get any more intensity and wavelength than what temperature it's at.

It's okay to have a non-ideal-black-body that emits most of its power in a narrow band, so long as its internal temperature is consistent with the peak intensity in that band, and the total spectral power is consistent with the law.  This could be relevant in the present case, but doesn't seem to be.  (There are lightbulbs under development which reflect IR back towards the filament, or which prohibit the filament from emitting as much in the first place, which do use this mechanism.)

You could superheat a gas stream until it breaks up into radicals and plasma (this will be some thousands K for most gasses), which may exhibit catalytic behavior in the present case.  But this basically forces you to use a flame in the first place (the flame temperature of most burning gasses is high enough, besides the chemical process at work), or heating the gas with a plasma discharge (like a plasma cutter or carbon arc torch).

Tim

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