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Lead-free (Ag,K)NbO3 materials for high-performance explosive energy conversion
Liu, Z; Lu, T; Xue, F; Nie, HC; Withers, R; Studer, A; Kremer, F; Narayanan, N; Dong, XL; Yu, DH; Chen, LQ; Liu, Y; Wang, GS
2020-05-01
Source PublicationSCIENCE ADVANCES
ISSN2375-2548
Issue21
SubtypeArticle
AbstractExplosive energy conversion materials with extremely rapid response times have broad and growing applications in energy, medical, defense, and mining areas. Research into the underlying mechanisms and the search for new candidate materials in this field are so limited that environment-unfriendly Pb(Zr,Ti)O-3 still dominates after half a century. Here, we report the discovery of a previously undiscovered, lead-free (Ag0.935K0.065)NbO3 material, which possesses a record-high energy storage density of 5.401 J/g, enabling a pulse current similar to 22 A within 1.8 microseconds. It also exhibits excellent temperature stability up to 150 degrees C. Various in situ experimental and theoretical investigations reveal the mechanism underlying this explosive energy conversion can be attributed to a pressure-induced octahedral tilt change from a(-)a(-)c(+) to a(-)a(-)c(-)/a(-)a(-)c(+), in accordance with an irreversible pressure-driven ferroelectric-antiferroelectric phase transition. This work provides a high performance alternative to Pb(Zr,Ti)O-3 and also guidance for the further development of new materials and devices for explosive energy conversion.
DOI10.1126/sciadv.aba0367
WOS KeywordROOM-TEMPERATURE ; DENSITY ; NIOBATE ; PHASE
Language英语
WOS Research AreaScience & Technology - Other Topics
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28088
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Liu, Z,Lu, T,Xue, F,et al. Lead-free (Ag,K)NbO3 materials for high-performance explosive energy conversion[J]. SCIENCE ADVANCES,2020(21).
APA Liu, Z.,Lu, T.,Xue, F.,Nie, HC.,Withers, R.,...&Wang, GS.(2020).Lead-free (Ag,K)NbO3 materials for high-performance explosive energy conversion.SCIENCE ADVANCES(21).
MLA Liu, Z,et al."Lead-free (Ag,K)NbO3 materials for high-performance explosive energy conversion".SCIENCE ADVANCES .21(2020).
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