Effect of sintering temperature and oxygen atmosphere on electrocaloric effect of BaTiO3 ceramics Xue-Chong Ren, Wei-Li Nie, Yang Bai and Li-Jie Qiao Eur. Phys. J. B, 88 9 (2015) 232 Published online: 16 September 2015 DOI: 10.1140/epjb/e2015-60445-2