scholarly journals Electrocaloric Effect and Phase Transitions in Ferroelectrics

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Dandan Li ◽  
Sheng-Guo Lu
Keyword(s):  
Phase Transitions ◽  
Electrocaloric Effect

scholarly journals Thickness-dependent electrocaloric effect in mixed-phase Pb 0.87 Ba 0.1 La 0.02 (Zr 0.6 Sn 0.33 Ti 0.07 )O 3 thin films

2016 ◽  
Vol 374 (2074) ◽  
pp. 20160056 ◽  
Author(s):  
T. M. Correia ◽  
Q. Zhang
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Phase Transitions ◽  
Film Thickness ◽  
Tetragonal Phase ◽  
Sol Gel ◽  
Breakdown Field ◽  
Electrocaloric Effect ◽  
Thickness Increase ◽  
Higher Temperature

Full-perovskite Pb 0.87 Ba 0.1 La 0.02 (Zr 0.6 Sn 0.33 Ti 0.07 )O 3 (PBLZST) thin films were fabricated by a sol–gel method. These revealed both rhombohedral and tetragonal phases, as opposed to the full-tetragonal phase previously reported in ceramics. The fractions of tetragonal and rhombohedral phases are found to be strongly dependent on film thickness. The fraction of tetragonal grains increases with increasing film thickness, as the substrate constraint throughout the film decreases with film thickness. The maximum of the dielectric constant ( ε m ) and the corresponding temperature ( T m ) are thickness-dependent and dictated by the fraction of rhombohedral and tetragonal phase, with ε m reaching a minimum at 400 nm and T m shifting to higher temperature with increasing thickness. With the thickness increase, the breakdown field decreases, but field-induced antiferroelectric–ferroelectric ( E AFE−FE ) and ferroelectric–antiferroelectric ( E FE−AFE ) switch fields increase. The electrocaloric effect increases with increasing film thickness. This article is part of the themed issue ‘Taking the temperature of phase transitions in cool materials’.

scholarly journals Phase transitions, energy storage performances and electrocaloric effect of the lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 ceramic relaxor

2019 ◽  
Vol 30 (7) ◽  
pp. 6430-6438 ◽  
Author(s):  
Zouhair Hanani ◽  
Daoud Mezzane ◽  
M’barek Amjoud ◽  
Anna G. Razumnaya ◽  
Sébastien Fourcade ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Energy Storage ◽  
Lead Free ◽  
Electrocaloric Effect

scholarly journals The Impact of Hysteresis on the Electrocaloric Effect at First-Order Phase Transitions

2017 ◽  
Vol 255 (2) ◽  
pp. 1700308 ◽  
Author(s):  
Madhura Marathe ◽  
Claude Ederer ◽  
Anna Grünebohm
Keyword(s):  
Phase Transitions ◽  
Electrocaloric Effect ◽  
First Order ◽  
First Order Phase ◽  
The Impact

Orientation related electrocaloric effect and dielectric phase transitions of relaxor PMN-PT single crystals

2017 ◽  
Vol 43 (18) ◽  
pp. 16300-16305 ◽  
Author(s):  
Tian-Fu Zhang ◽  
Xin-Gui Tang ◽  
Peng-Zu Ge ◽  
Qiu-Xiang Liu ◽  
Yan-Ping Jiang
Keyword(s):  
Phase Transitions ◽  
Single Crystals ◽  
Electrocaloric Effect ◽  
Dielectric Phase

Electric field induced phase transitions and electrocaloric effect of La3+ doped Pb(Zr,Sn,Ti)O3 ceramics

2021 ◽  
Author(s):  
Qihan Peng ◽  
Kumara Raja Kandula ◽  
Zhongqiu Xia ◽  
Chao Zhang ◽  
Yujing Zhang ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Electric Field ◽  
Electrocaloric Effect

scholarly journals Исследования физических свойств и электрокалорического эффекта в нано- и микрокерамике BaTiO-=SUB=-3-=/SUB=-

2019 ◽  
Vol 61 (6) ◽  
pp. 1128
Author(s):  
А.В. Карташев ◽  
В.С. Бондарев ◽  
И.Н. Флёров ◽  
М.В. Горев ◽  
Е.И. Погорельцев ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Phase Transitions ◽  
Solid State ◽  
Size Effect ◽  
Specific Heat ◽  
Applied Electric Field ◽  
Electrocaloric Effect ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Plasma Techniques

AbstractThe specific heat, thermal expansion, permittivity, and electrocaloric effect in bulk of BaTiO_3 (BT) samples in the form of nano- (nBT-500 nm) and micro- (mBT-1200 nm) ceramics fabricated using spark plasma sintering and solid-state plasma techniques have been investigated. The size effect has been reflected, to a great extent, in the suppression of the specific heat and thermal expansion anomalies and in the changes in the temperatures and entropies of phase transitions and permittivity, and a decrease in the maximum intensive electrocaloric effect: $$\Delta T_{{{\text{AD}}}}^{{\max }}$$ = 29 mK ( E = 2.0 kV/cm) for nBT and $$\Delta T_{{{\text{AD}}}}^{{\max }}$$ = 70 mK ( E = 2.5 kV/cm) for mBT. The conductivity growth at temperatures above 360 K leads to the significant irreversible heating of the samples due to the Joule heat release in the applied electric field, which dominates over the electrocaloric effect.

Phase Transitions and Electrocaloric Effect in Ca-Modified Na1/2Bi1/2TiO3–SrTiO3–PbTiO3Solid Solutions

2014 ◽  
Vol 61 (8) ◽  
pp. 1364-1367 ◽  
Author(s):  
Marija Dunce ◽  
Eriks Birks ◽  
Jani Perantie ◽  
Juha Hagberg ◽  
Maija Antonova ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Electrocaloric Effect

Broad-temperature-span and large electrocaloric effect in lead-free ceramics utilizing successive and metastable phase transitions

2019 ◽  
Vol 7 (44) ◽  
pp. 25526-25536 ◽  
Author(s):  
Chunlin Zhao ◽  
Junlin Yang ◽  
Yanli Huang ◽  
Xihong Hao ◽  
Jiagang Wu
Keyword(s):  
Phase Transitions ◽  
Metastable Phase ◽  
Lead Free ◽  
Electrocaloric Effect ◽  
Lead Free Ceramics

We achieved a large electrocaloric effect over a broad temperature span in lead-free ceramics utilizing successive and metastable phase transitions.

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