I've microwaved small (size which will fit) rough turned and finished items on defrost for a minute or so, with it placed on a sheet of kitchen towel to absorb any water, let cool between each heat burst until dry or weight has stabilized.
Have read somewhere to use full power for 3 minutes over likewise period frame. Low or medium bands I'd consider might be best, than the ex stream. Like with most things we encounter, it's to experiment.
Should a commercial kiln have been available, their material drying temperatures could dramatically differ from your timber needs, more than likely high enough to destroy your timber, there's as much in combining the right timbers or how they are stacked, as with drying timber in the first place.
Cheers