A notable limitation of RTGs (beyond their extreme cost compared to mini nuclear reactors) is their low outlet temperatures, limited by the fuel melting point. Strontium-90 Titanate has a melting point of 2350K and has been used in real RTGs, so it might make an interesting fuel choice that trades energy density for outlet temperature. What do you think?
We dig deep down into the very building blocks of life, seeking to twist them to our will. We destroy mass itself to turn its energy to our ends. The speed and intelligence of our machines grows without bound. But even the power of gods isn't enough. Ever hungry, we turn our eyes to the stars...
I sure hope there's someone else more advanced out there. If we're the first, the universe is screwed.
Sounds like the perfect power source for micro drones, as long as the minimum fuel size is brought down as well. Most things not limited by minimum size like criticality should be able to go as low as control rods can.
I gave it a shot at collecting the relevant properties, but something should have tipped me off -- the RTG interface does not allow compounds to show up as potential materials (note the absence of Pu dioxides, already defined in game).
This might work if you hack it to be a new element, rather than a compound, but then it is stretching the reality too much for me. As it is, it is not showing up on the RTG interface.
Here's what I have, anyway, if someone wants to pick up from here:
Properties mostly collected from SrTiO3, rather than specifically the version with Strontium-90. Couldn't find a boiling point, so copied from Diamond. Physical property sources: