Giant electrocaloric effect in the thin film relaxor ferroelectric 0.9PbMg1∕3Nb2∕3O3–0.1PbTiO3 near room temperature

In this work, ferroelectric SbSI shows a giant electrocaloric effect at room temperature under very low electric field shift of 0.37 kV cm-1. It is shown that the cooling ΔT per unit field MVm-1 is 2.97. This value is significantly larger, and is comparable with the value of 0.254 for PbZr 0.95 Ti 0.05 O 3 thin film under electric field shift of 30 kV cm-1. Moreover, the reduction in operating temperature opens up many more possibilities and widens the potential for applications in cooling systems.

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Room temperature electrocaloric effect on PbZr0.8Ti0.2O3 thin film

Journal of Applied Physics ◽

10.1063/1.3280031 ◽

2010 ◽

Vol 107 (1) ◽

pp. 014109 ◽

Cited By ~ 29

Author(s):

B. Li ◽

J. B. Wang ◽

X. L. Zhong ◽

F. Wang ◽

Y. C. Zhou

Keyword(s):

Thin Film ◽

Room Temperature ◽

Electrocaloric Effect

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Phase-transition induced giant negative electrocaloric effect in a lead-free relaxor ferroelectric thin film

Energy & Environmental Science ◽

10.1039/c9ee00269c ◽

2019 ◽

Vol 12 (5) ◽

pp. 1708-1717 ◽

Cited By ~ 19

Author(s):

Biaolin Peng ◽

Qi Zhang ◽

Bai Gang ◽

Glenn J. T. Leighton ◽

Christopher Shaw ◽

...

Keyword(s):

Thin Film ◽

Phase Transition ◽

Thick Films ◽

Ferroelectric Thin Film ◽

Relaxor Ferroelectric ◽

Lead Free ◽

Electrocaloric Effect

Ferroelectric/antiferroelectric thin/thick films with large positive or negative electrocaloric (EC) effects could be very useful in designing commercial refrigeration devices.

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Enhanced room temperature electrocaloric effect in lead-free relaxor ferroelectric NBT ceramics with excellent temperature stability

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.162241 ◽

2021 ◽

pp. 162241

Author(s):

Lipeng Zhu ◽

Xiangjun Meng ◽

Jianye Zhu ◽

Ye Zhao ◽

Yong Li ◽

...

Keyword(s):

Room Temperature ◽

Temperature Stability ◽

Relaxor Ferroelectric ◽

Lead Free ◽

Electrocaloric Effect

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Room temperature giant electrocaloric properties of relaxor ferroelectric 0.93PMN-0.07PT thin film

AIP Advances ◽

10.1063/1.4795156 ◽

2013 ◽

Vol 3 (3) ◽

pp. 032115 ◽

Cited By ~ 29

Author(s):

Mahmoud A. Hamad

Keyword(s):

Thin Film ◽

Room Temperature ◽

Relaxor Ferroelectric

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Studies on Water in the Hydration Chamber of a Modified Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069715 ◽

1970 ◽

Vol 28 ◽

pp. 544-545

Author(s):

R. C. Moretz ◽

G. G. Hausner ◽

D. F. Parsons

Keyword(s):

Thin Film ◽

Thin Films ◽

Electron Microscope ◽

Steady State ◽

Room Temperature ◽

Small Mass ◽

Equilibrium Pressure ◽

Biological Objects ◽

Mechanical Pump ◽

Differential Pumping

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

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Warm and freeze-fracture of cotton seed radicles

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100129206 ◽

1987 ◽

Vol 45 ◽

pp. 984-985

Author(s):

E. L. Vigil ◽

E. F. Erbe

Keyword(s):

Thin Film ◽

Water Vapor ◽

Fracture Surface ◽

Membrane Structure ◽

Room Temperature ◽

Freeze Fracture ◽

Longitudinal Axis ◽

Fracture Plane ◽

Cotton Seeds ◽

Condensed Water

In cotton seeds the radicle has 12% moisture content which makes it possible to prepare freeze-fracture replicas without fixation or cryoprotection. For this study we have examined replicas of unfixed radicle tissue fractured at room temperature to obtain data on organelle and membrane structure.Excised radicles from seeds of cotton (Gossyplum hirsutum L. M-8) were fractured at room temperature along the longitudinal axis. The fracture was initiated by spliting the basal end of the excised radicle with a razor. This procedure produced a fracture through the tissue along an unknown fracture plane. The warm fractured radicle halves were placed on a thin film of 100% glycerol on a flat brass cap with fracture surface up. The cap was rapidly plunged into liquid nitrogen and transferred to a freeze- etch unit. The sample was etched for 3 min at -95°C to remove any condensed water vapor and then cooled to -150°C for platinum/carbon evaporation.

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