Is it a good idea to use a ceramic inductor for a DC-DC boost converter instead of a wire wound one?
Most likely, you can't.
There is more to an inductor than just inductance. There is also current rating, winding resistance, core saturation current etc. In power conversion those can be even more important than the inductance itself, because it's where your inductor loses come from.
As a rule of thumb, if something seems to good to be true, it is. It's improbable that an element with fifth of the volume can have all parameters in same ranges.