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Indium foil is well used to produce excellent heatsinking for laser diode modules

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hanbillion

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Pontiacg5 said:
You all realize paypal offers absolutely no protection at all outside of ebay? I could sell you a $5,000 TV and ship you a shoe and you can file claims all day long but as long as the seller has a tracking number you will not get a dollar back.

It just seems that everyone thinks paypal is the greatest and is the safetst thing ever. Everyone just assumes they can get their money back, but 9 times out of ten you won't.

Just letting you know.
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I would like to say "Honesty is the best policy" or "Honesty is gold".
:)
 





Pontiacg5

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Kevlar said:
I could see how this would be good if used as pontiac5 and kenom said but do you guys think it could also be used for heatsinks where we use the aixiz module? Put some in between the aixiz module and the heatsink?
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With this stuff you could solder the aixiz module to the aluminum heatsink you put it in. This stuff will make an airtight seal between pretty much anything.
 
hanbillion

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For your reference, Indium creates effective and reliable helium tight hermetic seals between metals or non-metallics like glass and ceramics. For example, indium can be used to seal non-wettable surfaces in cryogenic applications, vacuum pumps and in heat-sensitive areas, etc..
When indium is used as the sealant, a chemical bond is formed between this silvery, semi-precious metal and the surfaces to be mated. Gaskets made from other materials only form a barrier to the medium being contained. Indium seals are far less sensitive to mechanical shock, vibration and low temperatures than other types of seals.
 
.3lite

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I don't get it how it works (atleast I'm not sure), wouldn't be a problem for you to provide some photos in which it is used?
 
hanbillion

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.3lite said:
I don't get it how it works (atleast I'm not sure), wouldn't be a problem for you to provide some photos in which it is used?
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To be frank, I don't have these photos, as we don't produce laser diode modules by ourselves, we are just a producer for indium foil. I am sorry.
 
Uranium

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It melts at 156°C. You solder the diodes in the heatsink with it.
 
hanbillion

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Uranium said:
It melts at 156°C. You solder the diodes in the heatsink with it.
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Yes, Indium is an ideal material to create a compression seal due to its softness. It remains malleable and ductile even at cryogenic temperatures. This indium foil can be used as a low melting point (156.60°C / 313.88°F melt point) solder, or as a gasket material for cryogenic seals.Indium limits the thermal stress to laser bars, while providing a good thermal conduit to the heat sink.
 
Uranium

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Pontiacg5 said:
With this stuff you could solder the aixiz module to the aluminum heatsink you put it in. This stuff will make an airtight seal between pretty much anything.
Click to expand...

Good luck soldering to aluminum! You need a strong acid flux, such as 20 Baume HCL.
 
Pontiacg5

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Obviously you don't know what indium is, because it is possible to solder almost anything with indium.
 
Uranium

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Pontiacg5 said:
Obviously you don't know what indium is, because it is possible to solder almost anything with indium.
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well, i've never soldered using indium before.
3021-2w388ic-th-1.gif
 
.3lite

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Sounds really cool, but 32 bucks for 10cmx10cm is hell expensive, I'm pretty sure that 10x10cm will only be enough for one module to made and to be honest, I'm still don't know how to work with it (it's like foil where we put it on module, heat it to 156C and it melts?).
 
hanbillion

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.3lite said:
Sounds really cool, but 32 bucks for 10cmx10cm is hell expensive, I'm pretty sure that 10x10cm will only be enough for one module to made and to be honest, I'm still don't know how to work with it (it's like foil where we put it on module, heat it to 156C and it melts?).
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As indium is a precious minor metal, so the price will be not as cheap as Aluminium. Of course, if your quantity is large, we can give you some discount accordingly. Please kindly note it.
As indium is very soft, you don't need to heat it to 156C.
 
Pontiacg5

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There is no need to melt it usually, you just press it in with the diode or module. If it gets hot enough it will solder the diode to the module on its own.
 
Uranium

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Pontiacg5 said:
There is no need to melt it usually, you just press it in with the diode or module. If it gets hot enough it will solder the diode to the module on its own.
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I would imagine that soldering would make a better thermal contact though.
 
millirad

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Indium is a wonderful product, and I may consider it for a future project. I would only use it to fuse an aixiz module into a copper heat sink for maximum thermal conductivity. If the laser diode dies then you could press it out and press a new one in to recycle the host material.
 
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