Actually, INSL would be the only thing you could use when making lasers or things with high temperature. That leaves a lot more uses for INSL than I first thought. However it does outclass QRTZ in almost every way so far, maybe it could conduct heat very quickly, does carbon fibre do that in real life?
It appears that carbon fibers have different thermal conductivities based on how they are made. Some of them conduct heat very slowly and make good insulators, but others conduct heat much faster. Interestingly, if carbon fibers are heated up to high temperatures, they slowly react with the air to form CO2.
Carbon fiber, also would need carbon too, right?