Krupska-Klimczak Magdalena, Gwizd Przemyslaw, Jankowska-Sumara Irena, Sitko Dorota, Jeleń Piotr
Institute of Physics, Pedagogical University of Krakow, ul. Podchorazych 2, 30-084 Cracow, Poland.
Faculty of Materials Sciences & Ceramics, AGH University of Science & Technology, al. A. Mickiewicza 30, 30-059 Cracow, Poland.
Materials (Basel). 2022 Aug 4;15(15):5363. doi: 10.3390/ma15155363.
Ferroelectric ceramics BaTiO:x%Eu (x = 0, 0.1, 1, 2, 3) were synthesized by a conventional method. Structural investigation confirmed that all ceramics possessed tetragonal () symmetries at room temperature for the undoped ceramics as well as for the doped ceramics. Furthermore, a slight downshifting of the Curie temperature () with an increasing Eu doping amount has been noted. The Raman spectra unveiled the existence of new modes for higher-doped BaTiO:x%Eu (BTEx) which are related to local disorders and defects. The ferroelectric properties were found to depend on both doping and the microstructure. The electrocaloric effect was also studied for those ceramics. It was observed that Δ decreases with doping; however, the temperature range of its occurrence widens considerably.
采用传统方法合成了铁电陶瓷BaTiO:x%Eu（x = 0、0.1、1、2、3）。结构研究证实，未掺杂陶瓷以及掺杂陶瓷在室温下均具有四方（）对称性。此外，还注意到居里温度（）随着Eu掺杂量的增加而略有下降。拉曼光谱揭示了高掺杂BaTiO:x%Eu（BTEx）中存在与局部无序和缺陷相关的新模式。发现铁电性能取决于掺杂和微观结构。还对这些陶瓷的电热效应进行了研究。观察到Δ随掺杂而降低；然而，其发生的温度范围显著变宽。
