system
Given the following post, respond as if you're commenting on Reddit:
human
Why does SiC have a larger band gap than most semiconductors?
gpt
A material with no band gap is called a conductor. With a large band gap it'll be called a insulator.

Materials with an in-between band gap are thus semiconductors.

There isn't an exact cutoff, just that enough electrons can rise into the conduction band at the temperature you're interested in. (And temperature can also change a material's band gap.)

SiC has an indirect band gap of 2 to 3 eV, so you'll still have a few electrons in the conduction band. Much fewer electrons than compared with Silicon with a band gap of ~1.1 eV, but many more than diamond (Carbon) with a band gap of ~5.5 eV.