When I tested the Halnziye HY-P17 for the first time, my jaw almost dropped. The performance delivered by this thermal compound is simply brutal and anything but what you would have expected from this manufacturer. Halnziye was previously known for solid but inconspicuous mass-produced goods that rarely rose above mediocrity. But it is precisely this image that is pulverized by the HY-P17. In my extensive database, this paste is not only at the top of the list, it also makes established greats look downright old. But despite all the euphoria, there is also a legitimate question: is the HY-P17 really the measure of all things or just a short-term outlier? This is precisely the question I will be exploring in detail today.
What you get
However, there is a certain fly in the ointment, as Halnziye couldn’t resist advertising an unrealistically high thermal conductivity value of 17.3 W/mK on the packaging. A figure that belongs more in the realm of wishful thinking and optimistically calculated powder mixtures than in the reality of practical applications of such ceramic pastes, which reach the theoretical limit at around 7 W/mK. A pity, really, because with this actually measured performance of an astonishing 6.8 W/mK, there would have been no need for such exaggerations. The paste is convincing on its own merits, even without pseudo-scientific number games and fake bucket measurements.
The key technical data is otherwise solid. HY-P17 is based on a silicone oil matrix that has been enriched with metal oxide fillers. According to the data sheet, the viscosity is in the medium to slightly higher range, which is also confirmed during application. It can still be spread evenly without appearing too fluid or bleeding out too much when pressed, on the contrary. The operating temperature range is specified as -30 to 130 °C, which remains within limits and indicates that the formulation is still quite temperature-stable for the PC. As expected, the paste is not electrically conductive, which gives additional leeway when used on open dies or sensitive components.
In addition to the paste in the usual syringe, the scope of delivery also includes a small plastic spatula for even distribution and an alcoholized cleaning pad. This may not be a sensation, but it is a well thought-out and clean solution for multiple use.
How Halnziye has managed to catapult itself so clearly to the top with the HY-P17 remains to a certain extent a matter of speculation. It is possible that significantly higher quality fillers were used here, for example by adding very fine aluminum or boron nitrides in a suitable particle distribution. Significantly improved dispersion in the carrier matrix could also contribute to the exceptionally good performance, as could a new formulation with optimized interface chemistry that minimizes thermal contact resistance. Whether this paste is the result of targeted in-house development or simply a successful OEM purchase is difficult to say without a closer look at the production process. The fact is, however, that this paste is currently playing in a league that Halnziye could never have expected.
This is precisely why I have chosen this paste today. Not just because it might change the market and set records, of course, but because it is representative of a whole segment of new, significantly improved products that are often overlooked in the shadow of the established performance elite, but which fulfill a practical purpose. And that is sometimes more than some expensive representatives of the supposed upper class can afford.
| Test setup and methods | Material analysis and microscopy | Basic knowledge |
 Here you can find out why effective thermal conductivity and bulk thermal conductivity can be completely different in practice, what role the contact resistance between the surfaces and the paste plays and how thermal compound can be measured precisely. There is also a detailed description of the equipment, the methodology and the error tolerances. |
 You will learn how laser-induced plasma spectroscopy works and the advantages and limitations of the measurements. There is also high-resolution digital microscopy and analysis of particle sizes. This information is also used to estimate the long-term stability of a paste. |
 Anyone who has always wanted to know what is or is not in a paste and how these pastes are produced will find what they are looking for here. The basic article provides a better understanding of what is often sold for far too much money and sometimes with adventurous promises. |
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