chemistry-2019-keynote

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allied
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May 13-14, 2019 | Prague, Czech Republic
Chemistry and Medicinal Chemistry
9th World Congress on
Page 19
Asian Journal of Biomedical and Pharmaceutical Sciences | Volume 9 ISSN: 2249-622X
Large electrocaloric (EC) effect with a broad operational
temperature range is required and attractive in solid-state
cooling devices. In this work, a giant EC effect (ΔT ~ 20.7K) in
a broad temperature range ( ~ 110 K) was demonstrated in
relaxor antiferroelectric (AFE) Pb0.97La0.02 (Zr0.65 Sn0.3Ti0.05) O 3
(PLZST) sol-gel thin film. The use of the LaNiO3/Pt composite
bottom electrode may cause the in-plane residual thermal
tensile stress during the layer-by-layer annealing process,
which may be responsible for the large positive EC effect.
The coexistence of nanoscale multiple FE and AFE phases
leads to the great dielectric relaxor dispersion around the
dielectric peak, which may be ascribed to the broad EC
operational temperature range. These newly-discovered
properties in the PLZST thin films suggest thismultifunctional
material having a great potential for applications in modern
solid-state cooling.
Speaker Biography
Qi Zhang is a senior lecturer in Cranfield University, UK and a professor
in Wuhan University of Technology, Wuhan, China. He has his expertise
in functional materials. He was one of the initiators of the thin film
electrocaloric effect, which could develop. He has authored or co-
authored over 200 papers, edited one book and 10 book chapters.
He has an h factor of 30. He is a fellow and charted scientist in IOM3.
His main areas of research are within synthesis of nanomaterials for
electrochemical energy storage, fabrication of transparent conducting
thin films and sol-gel synthesis and structural characterization of
ferroelectric thin films for electrocaloric cooling. He was the recipient
of the Royal Society Brian Mercer Feasibility Award.
e:
Qi Zhang
Biaolin Peng
Cranfield University, UK
Giant electrocaloric effect found in the relaxor PLZST thin films with
the coexistence of antiferroelectric and ferroelectric phases in a
broad temperature range
Qi Zhang et al., Asian J Biomed Pharmaceut Sci, Volume:9
DOI: 10.4066/2249-622X-C2-019
Notes: