After a training as technician for ceramic processing in 1989 and studies in process and materials engineering, Annett Dorner-Reisel, worked as scientific staff. She received her PhD at the age of 27 years from TU Chemnitz (D). She specialized in biomaterials and hybrid structures for biomedical and functional materials for transportation and energy sector, i.e. sensor/actor applications or high performance carbon allotropes. Dr. Dorner-Reisel carried out postdoctoral studies at UC Santa Barbara, USA and Nagoya Institute of Research, Japanmailto:firstname.lastname@example.org. Following second doctoral degree (Habilitation) at the age of 32 years at the Bergakademie Freiberg (D), she worked several years in industry before engaging 2011 in a professorship position at the Schmalkalden University HS SM. Since 2017, Prof. Dr.-Ing. habil. Dorner-Reisel is head of the research group “Bio-STEP” at HS SM, which clusters several researchers from different working directions like materials, production technology electronics and signal transfer. Bio-STEP focuses on biomaterials, biogenic materials for energy and light weight sectors, bionics and biomimetic.
Two-step sintering (TSS) offers several advantages like fine-grained microstructure or controlled porosity, which lead to sophisticated and exact adapted mechanical and functional properties. Typically, TSS methods apply two sintering stages: Step (I) thermal pretreatment and initial heating stage for stimulation of diffusion and grain size re-configuration; Step (II) sintering at elevated temperatures for reaching the final microstructure. The parameters of both stages are essential for the density, remaining pore arrangements and grain size compositions, or in some cases decomposition, amorphisation and recrystallization. Such parameters are temperatures, heating rate, holding times and atmosphere. Particle size distribution and shapes or doping agent influence the successful microstructural design additional. In the present study, a two-step sintering method for 3D printed calcium phosphate powder was explored. 3D printed calcium phosphate bodies should be sintered easily and costeffective at the costumers laboratory. Pressure less sintering fulfills the demand for minimal price and low technical investment. It may be a future technique for consolidation of costumer printed ceramic pasts.