scholarly journals Direct measurement of giant electrocaloric effect in BaTiO3 multilayer thick film structure beyond theoretical prediction

2010 ◽  
Vol 96 (19) ◽  
pp. 192902 ◽  
Author(s):  
Yang Bai ◽  
Guangping Zheng ◽  
Sanqiang Shi
Keyword(s):  
Theoretical Prediction ◽  
Thick Film ◽  
Direct Measurement ◽  
Film Structure ◽  
Electrocaloric Effect

Large electrocaloric effect in lead-free Ba(ZrxTi1-x)O3 thick film ceramics

2018 ◽  
Vol 742 ◽  
pp. 165-171 ◽  
Author(s):  
Xiao-Dong Jian ◽  
Biao Lu ◽  
Dan-Dan Li ◽  
Ying-Bang Yao ◽  
Tao Tao ◽  
...  
Keyword(s):  
Thick Film ◽  
Lead Free ◽  
Electrocaloric Effect

Direct measurement of enhanced electrocaloric effect in Mn2+ doped lead-free Ba(ZrTi)O3 ceramics

2020 ◽  
Vol 176 ◽  
pp. 67-72
Author(s):  
Hao-Xuan Li ◽  
Xiao-Dong Jian ◽  
Xiang Niu ◽  
Ying-Bang Yao ◽  
Tao Tao ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Lead Free ◽  
Electrocaloric Effect

Electrical characterization of thick film materials

2015 ◽  
Vol 2015 (CICMT) ◽  
pp. 000079-000084
Author(s):  
L. Rebenklau ◽  
P. Gierth ◽  
H. Grießmann
Keyword(s):  
Thick Film ◽  
Thick Films ◽  
Thermal Characteristics ◽  
Electrical Characterization ◽  
Film Structure ◽  
Low Noise ◽  
Measurement Methods ◽  
Electrical Performance ◽  
Track Width ◽  
Thick Film Technology

The thick-film technology is one of the fundamental technologies for the production of circuit carriers for electronic modules. It is mainly used in areas with harsh environmental conditions, such as sensor or automotive applications. Basis of the thick film technology are glass-based pastes, which are screen printed on ceramic substrates and fired in a high temperature process at (500…1000) ° C. Such thick film pastes are commercially available from various suppliers as elements of paste systems, which mainly include compatible isolation, resistance and conductive pastes. There are a number of requirements according the fired thick film characteristics, such as high breakdown voltage of isolation thick films or low noise performances of resistance thick films. However, the most requirements are concentrating on conductor thick films. They should guarantee excellent properties in terms of assembling (soldering, bonding) which are focused in a many publications. Simultaneously, they should also offer very good electrical characteristics that have not been completely investigated until today. At Fraunhofer IKTS different measurement methods are developed and adapted to characterize the electrical performance of thick film structures. Already well known is the short term overload (STOL) measurement of thick film resistances, which determining the maximum power dissipation of the thick film structure. The basic concept of this measurement is adapted on conductive thick film structures like conductive tracks or vias. The investigations show correlations between geometrical thick film properties and the resulting thermal characteristics of the thick film structure. Results can be used to improve screen-printing layouts in terms of cost reduction (paste consumption) and thermal management (track width, via diameter), but can also help to improve paste compositions itself. The paper will give an overview of the used electrical measurement methods and present exemplary results.

Electrocaloric Effect in PZT Thick Film for the Cooling Device Applications

2021 ◽  
pp. 71-79
Author(s):  
Vandana ◽  
Reema Gupta ◽  
R. P. Tandon ◽  
Monika Tomar ◽  
Vinay Gupta
Keyword(s):  
Thick Film ◽  
Cooling Device ◽  
Electrocaloric Effect ◽  
Device Applications ◽  
Pzt Thick Film

The Electrocaloric Effect in BaTiO3 Thick Film Multilayer Structure at High Electric Field

2012 ◽  
Vol 512-515 ◽  
pp. 1304-1307 ◽  
Author(s):  
Yang Bai ◽  
Kai Ding ◽  
Guang Ping Zheng ◽  
San Qiang Shi ◽  
Lie Jie Qiao ◽  
...  
Keyword(s):  
Electric Field ◽  
Thick Film ◽  
Temperature Change ◽  
Multilayer Structure ◽  
Tape Casting ◽  
Adiabatic Temperature ◽  
Ferroelectric Ceramics ◽  
Heat Absorption ◽  
Electrocaloric Effect ◽  
Adiabatic Temperature Change

We demonstrated the superior electrocaloric effect (ECE) in BaTiO3 multilayer structure. The sample fabricated by tape-casting process has 120 effective ferroelectric layers with average layer thickness of 1.7 μm. The ferroelectric hysteresis loops were measured in the temperature range from 30 to 180 oC, and then the temperature dependences of ECE adiabatic temperature change and heat absorption were obtained according to Maxwell relation. A peak ECE adiabatic temperature change of 0.027 K/V and heat absorption of 0.36 J/g were observed near the ferroelectric phase transition at 125 oC under Vmax=25 V. The BaTiO3 thick film can sustain an external electric field (>500 kV/cm) several times higher than bulk ferroelectric ceramics (~30 kV/cm). Although the EC coefficient of BaTiO3 is much lower than lead-based ferroelectric ceramics, the ultrahigh working electric field endows it a large ECE, higher than that of most reported lead-based ferroelectric ceramics. In addition, the lead-free composition provides it a promising future in solid-state cooling technology.

Nonadiabatic direct measurement electrocaloric effect in lead-free Ba,Ca(Zr,Ti)O3 ceramics

2013 ◽  
Vol 550 ◽  
pp. 561-563 ◽  
Author(s):  
Jinfei Wang ◽  
Tongqing Yang ◽  
Shengchen Chen ◽  
Gang Li ◽  
Qingfeng Zhang ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Lead Free ◽  
Electrocaloric Effect
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