Got Kerafol Red in the diyAudio Store..
... Sort of like Kerafol pads....
The alox are usually either thick (0.06"/60mil/1.524mm), or very thick (0.1"/100mil/2.54mm).Given how much better the aluminium oxide pads seem to be maybe we should try to get the store to stock those as well as an alternative?
When one takes account of the thermal resistance using the thickness of the insulating substrate, one finds that very thick alox is not much different from thin mica (0.001"/1mil/0.0254mm).
Both can be assumed to have two layers of Thermal Goop to complete the Thermal Path.
Kapton for a thermal interface generally comes in thicknesses from 0.001" to 0.006".........................
I also think it's safe to say that Kapton isn't a good option..
The thicker versions (0.0015" to 0.006") are near useless for high power density.
Use 0.001"/1mil/0.0254mm Kapton with two layers of Thermal Goop and you will find that Kapton performs rather well.
But I can't find 1mil Kapton at a price I am prepared to pay.
Andrew did you see the reported results in post 218 ? Shows much better results cf mica ?
The alox are usually either thick (0.06"/60mil/1.524mm), or very thick (0.1"/100mil/2.54mm).
When one takes account of the thermal resistance using the thickness of the insulating substrate, one finds that very thick alox is not much different from thin mica (0.001"/1mil/0.0254mm).
Both can be assumed to have two layers of Thermal Goop to complete the Thermal Path.
Kapton for a thermal interface generally comes in thicknesses from 0.001" to 0.006"
The thicker versions (0.0015" to 0.006") are near useless for high power density.
Use 0.001"/1mil/0.0254mm Kapton with two layers of Thermal Goop and you will find that Kapton performs rather well.
But I can't find 1mil Kapton at a price I am prepared to pay.
Local Chinese Junque reseller shop has several width rolls of V thin ~ .001"
(allegedly ..Kapton tape for ~2$ a roll.
Dunno if it's ideal, or even genuine Kapton, but the price is attractive.
But then he also sells a package of surprisingly thin precut/holed mica wafers for $2.
Have a couple of baggies of the Micas (hey $2)
Just fitted some today actually, to my F6 attempt.
Even fooled with splitting some even further.. for sport.
Got a few to V thin and even intact (uncracked).
Cant see Why the Kapton (?) tape wouldn't work though.
It's V thin and survives My Bics' flame for a decent time.
So it actually is heat resistant
Lees electronics.
Small shop selling seemingly Ebay/Aliexpress sourced 'stuff' .
Just fitted some today actually, to my F6 attempt.
Even fooled with splitting some even further.. for sport.
Got a few to V thin and even intact (uncracked).
Cant see Why the Kapton (?) tape wouldn't work though.
It's V thin and survives My Bics' flame for a decent time.
So it actually is heat resistant
Lees electronics.
Small shop selling seemingly Ebay/Aliexpress sourced 'stuff' .
The 30m roll of 25mm wide koptan arrived from China.Kapton for a thermal interface generally comes in thicknesses from 0.001" to 0.006"
The thicker versions (0.0015" to 0.006") are near useless for high power density.
Use 0.001"/1mil/0.0254mm Kapton with two layers of Thermal Goop and you will find that Kapton performs rather well.
But I can't find 1mil Kapton at a price I am prepared to pay.
Does the spelling mean it is not Kapton?
The plastic film plus adhesive has a total thickness of ~1.6thou (~1.6mil, 0.04mm) making it fairly good as a Thermal conductor.
I'll try to measure the cleaned film later.
I have noted in the past with pre-applied adhesive that it flows out of the interface when under pressure from clamping and with a bit of heat from the semi device.
I'll see if this version does similar.
Where did you find Kapton tape on Rod Elliot's website?Rod Elliott has 0.001 Kapton Tape available on his website---$7.50 for 1 meter. Good stuff!!
At the bottom of Rod Elliott's price list (ESP - Complete Price List) is "KAP-1".
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