scholarly journals New Lead Free Perovskites with a Diffuse Phase Transition: NaNbO3 Solid Solutions

2002 ◽  
Author(s):  
I. P. Raevski
Keyword(s):  
Phase Transition ◽  
Solid Solutions ◽  
Diffuse Phase Transition ◽  
Lead Free ◽  
Diffuse Phase

New, Lead Free Materials with a Diffuse Phase Transition: NaNbO 3 -Based Solid Solutions

2002 ◽  
Vol 47 (1) ◽  
pp. 277-283 ◽  
Author(s):  
I. P. Raevski ◽  
S. A. Prosandeev ◽  
L. Jastrabik
Keyword(s):  
Phase Transition ◽  
Solid Solutions ◽  
Diffuse Phase Transition ◽  
Lead Free ◽  
Diffuse Phase

Diffuse Phase Transition and Dielectric Properties of Lead-Free Zr-Doped BCTS Ceramics

2017 ◽  
Vol 866 ◽  
pp. 259-262 ◽  
Author(s):  
Puripat Kantha ◽  
Kamonpan Pengpat ◽  
Nuttapon Pisitpipathsin
Keyword(s):  
Phase Transition ◽  
Dielectric Constant ◽  
Diffuse Phase Transition ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Phase Transition Behavior ◽  
Conventional Solid State Reaction ◽  
Maximum Dielectric Constant ◽  
Cubic Structure ◽  
Diffuse Phase

Lead-free Ba0.9Ca0.1Sn0.06Ti0.94-xZrxO3 (BCTSZ) ceramics where x = 0.00, 0.03, 0.05, 0.07 and 0.09 were prepared by the conventional solid-state reaction method. The dielectric constant of the Zr doped BCTS ceramic was enhanced by Zr incorporation. The maximum dielectric constant were obtained at the composition of x = 0.05. The dielectric property investigation indicated that the degree of the diffuse phase transition behavior increased with Zr substitution. Phase transition of tetragonal to cubic structure was significantly dependent on the amount of Zr added.

Lead-free (Ba,Ca)(Zr,Ti)O3 Based Electrocaloric Devices: Challenges and Perspectives

2013 ◽  
Vol 1581 ◽  
Author(s):  
Gunnar Suchaneck ◽  
Gerald Gerlach
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Electric Fields ◽  
Diffuse Phase Transition ◽  
Lead Free ◽  
Large Temperature ◽  
Temperature Changes ◽  
Diffuse Phase

ABSTRACTIn this work, we analyze the requirement to (Ba,Ca)(Zr,Ti)O3 thin films for applications in electrocaloric devices. We demonstrate that large temperature changes are realized mostly independent of the used material by applying sufficient electric fields. Ferroelectrics exhibiting a diffuse phase transition are beneficial for electrocaloric applications, but they change the range of operational temperatures.

Large electrocaloric effect over a wide temperature range in BaTiO3-modified lead-free ceramics

2019 ◽  
Vol 7 (5) ◽  
pp. 1353-1358 ◽  
Author(s):  
Luo Zhao ◽  
Xiaoqin Ke ◽  
Zhijian Zhou ◽  
Xiaoqi Liao ◽  
Junjie Li ◽  
...  
Keyword(s):  
Phase Transition ◽  
Wide Temperature Range ◽  
Diffuse Phase Transition ◽  
Lead Free ◽  
Broad Temperature Range ◽  
Electrocaloric Effect ◽  
Temperature Range ◽  
Lead Free Ceramics ◽  
Diffuse Phase

BT-13CH exhibits a large electrocaloric effect over a broad temperature range because of multiphase coexistence (MPC) with diffuse phase transition (DPT) character.

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