Lead-free (Ag,K)NbO3materials for high-performance explosive energy conversion

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dc.contributor.authorLiu, Zen_AU
dc.contributor.authorLu, Ten_AU
dc.contributor.authorXue, Fen_AU
dc.contributor.authorWithers, RLen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorNarayanan, Nen_AU
dc.contributor.authorDong, XLen_AU
dc.contributor.authorYu, Den_AU
dc.contributor.authorChen, Len_AU
dc.contributor.authorWang, Gen_AU
dc.contributor.authorLiu, Yen_AU
dc.date.accessioned2024-01-18T00:32:37Zen_AU
dc.date.available2024-01-18T00:32:37Zen_AU
dc.date.issued2020-11-11en_AU
dc.date.statistics2023-05-01en_AU
dc.description.abstractExplosive energy conversion materials with extremely rapid response times have a diverse and growing range of applications in energy, medical, and mining areas. Research into the underlying mechanisms and the search for new candidate materials is so limited that Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 is still the dominant material after half a century. In this work, we report the discovery of a new, lead-free ferroelectric material, (Ag0.935K0.065)NbO3 for explosive energy conversion applications. This material not only possesses a record-high energy storage density of 5.401 J/g, but also exhibits excellent temperature stability (up to a disruptive ferroelectric to ferroelectric phase transition at 150oC) by comparison with Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 (which exhibits the ferroelectric to ferroelectric phase transition but at the much lower temperature of 41~70oC). (Ag0.935K0.065)NbO3 enables extremely high power, energy conversion within 1.8 microseconds, generating a pulse with e.g. a current ~ 22 A. Furthermore, pressure-dependent physical characterization, together with transmission electron microscopy, in-situ neutron diffraction analysis and theoretical modelling, reveals the mechanism underlying the observed explosive energy conversion behavior. It is found that the fast release of the stored energy can be attributed to a pressure-induced octahedral tilt change from a-a-c+ to AgNbO3-type a-a-c-/a-a-c+, in accordance with an irreversible pressure driven FE-AFE phase transition. This work provides not only an alternative (with significantly better performance) to the current commercially-employed lead-containing materials, but also provides guidance for the further development of new materials and devices for explosive energy conversion applications. Copyright © 2020 The Authors.en_AU
dc.identifier.booktitleAANSS Abstract Bookleten_AU
dc.identifier.citationLiu, Z., Lu, T., Xue, F., Withers, R., Studer, A., Narayanan, N., Dong, X., Yu, D., Chen, L., Wang, G., & Liu, Y. (2020). Lead-free (Ag,K)NbO3materials for high-performance explosive energy conversion. Poster presented to ANBUG-AINSE Neutron Scattering Symposium, AANSS 2020, Virtual Meeting, 11th - 13th November 2020. (pp. 89). Retrieved from: https://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.conferenceenddate2020-11-13en_AU
dc.identifier.conferencenameANBUG-AINSE Neutron Scattering Symposium, AANSS 2020en_AU
dc.identifier.conferenceplaceOnlineen_AU
dc.identifier.conferencestartdate2020-11-11en_AU
dc.identifier.pagination89en_AU
dc.identifier.urihttps://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15359en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineering (AINSE)en_AU
dc.subjectMaterialsen_AU
dc.subjectEnergyen_AU
dc.subjectMiningen_AU
dc.subjectFerroelectric materialsen_AU
dc.subjectConversionen_AU
dc.subjectStabilityen_AU
dc.subjectLeaden_AU
dc.subjectNiobiumen_AU
dc.titleLead-free (Ag,K)NbO3materials for high-performance explosive energy conversionen_AU
dc.typeConference Posteren_AU
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