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Issue 9, 2016
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Lead-free relaxor ferroelectric ceramics with high optical transparency and energy storage ability

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Abstract

We prepared highly transparent relaxor ferroelectric ceramics based on (K0.5Na0.5)NbO3 using a pressure-less solid-state sintering method without using hot isostatic pressing and spark plasma sintering. A high energy storage density of 2.48 J cm−3 and high transparency in the visible region (ca. 60% at 0.7 μm) were achieved for the 0.8(K0.5Na0.5)NbO3–0.2Sr(Sc0.5Nb0.5)O3 ceramics with submicron-sized grains (about 0.5 μm). The energy storage density of 2.48 J cm−3 exceeded all previous reports for lead-free bulk ceramics. These results demonstrate that the 0.8(K0.5Na0.5)NbO3–0.2Sr(Sc0.5Nb0.5)O3 ceramics are promising lead-free transparent dielectric materials for use in transparent electronic devices. This study not only opens up a new avenue for the design of lead-free transparent ferroelectric ceramics with a high energy storage density, but also expands the applications of (K0.5Na0.5)NbO3-based ceramics into new areas beyond piezoelectric applications.

Graphical abstract: Lead-free relaxor ferroelectric ceramics with high optical transparency and energy storage ability

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Publication details

The article was received on 27 Nov 2015, accepted on 12 Jan 2016 and first published on 15 Jan 2016


Article type: Paper
DOI: 10.1039/C5TC04005A
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Citation: J. Mater. Chem. C, 2016,4, 1795-1803

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    Lead-free relaxor ferroelectric ceramics with high optical transparency and energy storage ability

    B. Qu, H. Du and Z. Yang, J. Mater. Chem. C, 2016, 4, 1795
    DOI: 10.1039/C5TC04005A

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