A new coil design has emerged using sintered porous ceramic as a wicking material to provide eliquid to the coil, negating the need for fibrous wicks. Currently this design is being used in the Vaporesso, and soon to be in the iJoy Reaper Plus. I have been trying to do some homework on this material as a wick, but there haven't been any studies done in that area (at least that I can find). There are, however, many studies about thermal degradation of ceramics, including sintered porous ceramics. Most of them (online) require payment to read, so I can't link any of them here. Here is one that is free to read: http://www.hindawi.com/journals/isrn/2011/816853/ While it doesn't answer specific questions vapers might have, it does shed some light on a material most of us vapers know very little about. I am not a material scientist, so if there are any ceramic experts reading this, please feel free to correct me if I am misunderstanding this study, or if you can add any scientific knowledge about the safety of ceramic as a wick/coil.