Thermal Putty H234
Let’s start with the multi-point measurement of the HY234. A total of 5 x 5 measuring points can be approached and determined simultaneously. The aluminium oxide from the measurement must be an impurity, because I did not find it at other points. So you have to factor it out. We see primarily a zinc oxide-silicone mixture with traces of hydrogen. Hydrogen is of course also found in silicone oil (diorganopolysiloxane), so with so little one can assume that it is not the remains of a hydrazine solution.
Usually, hydrazine is used as a catalyst in the production (suitable for reduction or oxidation), whereby the hydrazine is always strongly diluted and thus also contains water. The water and the residues in turn have to be removed cleanly at the end of the production process, both by pressure and by heat above 80 °C. If this is not done long enough, the hydrazine will be lost. If you do not do this long enough, you will have residues. Of course, you have to measure some hydrogen, but in total it was less than 2 per cent.
Thermal Putty H236
The HY236 also shows a single contamination with aluminium oxide, but again it has nothing to do with the putty as such. Again, the hydrogen just described appears in small quantities. Of course, such small amounts (in total less than 2%) are still quite plausible. In principle, both maerials are very similar, although the consistency is different.
And the winner is?
HY234 or HY236? The more pigemnent HY236 is usually a bit more expensive and also a bit more viscous. It also doesn’t stick to the components as much. That was also the reason why I preferred it. In the second test I found out that the voltage converters of a current 7900 XTX remained even up to 2 Kelvin cooler. And what happens if you compare both analyses? I have filtered out the hydrogen and the aluminum oxide from the contamination.
In the picture below, we see HY236 on the left and HY234 on the right. The more viscous H236 thus has a slightly higher proportion of zinc oxide (ZnO) than the silicone, which also results in the higher viscosity. Otherwise, both products are the same. So HY234 has merely been stretched a little more with silicone, but no other differences can be seen.
For this very reason, I would advise against HY234 and use the more viscous HY236. Of course, this is also because it is easier to remove and clean later. You won’t go broke with the HY234, but why not buy the basser one? Or you can take the blue Thermal Putty from Honeywell. If you can get it. Whereby also the HY236 does it.
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