Which materials used for plates absorb microwaves? I was thinking about getting plate that can be safely heated by microwave. What material should I look for? My point is to (partialy) turn microwave into induction heater. Plate like this is already sold by Samsung as "crusty plate", but those are hard to come by - I have seen them only along with new microwave.
In my experience, vitreous ceramic (Luminarc) heats up a lot in a microwave, usually ending up hotter than the food. But I cannot tell you if it has some advantage over heating the food in any other material. 

Also, if you really want to eat crispy roasted food, the microwave is probably the least suited heating method for that. I have never used the suggested "crusty plate" but I wouldn't expect much of it.