High comprehensive electrocaloric performance in barium titanate-based ceramics via integrating diffuse phase transition near room temperature and a high applied electric field

2021 ◽  
Author(s):  
Amei Zhang ◽  
Hongping Hou ◽  
Na Liao ◽  
Zhuang Miao ◽  
Xin Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Barium Titanate ◽  
Electric Field ◽  
Applied Electric Field ◽  
Diffuse Phase Transition ◽  
Room Temperature ◽  
Diffuse Phase

Enhanced room temperature electrocaloric effect in barium titanate thin films with diffuse phase transition

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 21826 ◽  
Author(s):  
Lijie Wang ◽  
Jinbin Wang ◽  
Bo Li ◽  
Xiangli Zhong ◽  
Fang Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Barium Titanate ◽  
Diffuse Phase Transition ◽  
Room Temperature ◽  
Electrocaloric Effect ◽  
Diffuse Phase

Diffuse phase transition in co doped barium titanate

1981 ◽  
Vol 34 (1) ◽  
pp. 169-174 ◽  
Author(s):  
G. Godefroy ◽  
P. Chatry ◽  
L. Benguigui
Keyword(s):  
Phase Transition ◽  
Barium Titanate ◽  
Diffuse Phase Transition ◽  
Doped Barium Titanate ◽  
Diffuse Phase ◽  
Co Doped

Study on Defect Complexes in High-K Sr and Zr Co-Doped BaTiO3 Ceramics

2013 ◽  
Vol 750-752 ◽  
pp. 501-505
Author(s):  
Da Yong Lu ◽  
Xiu Yun Sun
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Diffuse Phase Transition ◽  
Room Temperature ◽  
Raman Band ◽  
Phase Transition Behavior ◽  
Defect Complexes ◽  
High K ◽  
Diffuse Phase ◽  
Co Doped

In order to investigate the evidence for the formation of Sr2+-Zr4+ defect complexes in high-k Sr and Zr co-doped BaTiO3 ceramics, BaTiO3, (Ba0.85Sr0.15)TiO3, Ba (Ti0.8Zr0.2)O3, and (Ba0.85Sr0.15)(Ti0.8Zr0.2)O3 (BS15TZ20) ceramics were prepared using a mixed oxide method. The Y5V-type BS15TZ20 shows a high-k diffuse phase transition behavior (ε ́m = 8000) and its Curie peak occurs near room temperature. The evolution in crystal structure and in dielectric property for the four samples gives four evidences for the formation of Sr2+-Zr4+ defect complexes in BS15TZ20. The splitting of the 720 cm-1 Raman band does not relate to Sr2+-Zr4+ defect complexes, but to a multiphonon (A1 (TO2) + A1 (TO3)).

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