PT Journal AU Acker, J Kungl, H Schierholz, R Wagner, S Eichel, R Hoffmann, MJ TI Microstructure of sodium-potassium niobate ceramics sintered under high alkaline vapor pressure atmosphere SO Journal of the European Ceramic Society PY 2014 BP 4213 EP 4221 VL 34 IS 16 DI 10.1016/j.jeurceramsoc.2014.06.021 LA english ER