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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Bi1/2Na1/2TiO3-BaTiO3 based thick-film capacitors for high-temperature applications

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Title
Bi1/2Na1/2TiO3-BaTiO3 based thick-film capacitors for high-temperature applications
Author
Zang, JiadongJo, WookZhang, HaiboRoedel, Juergen
Keywords
Capacitor; Ferroelectrics; High temperature dielectrics; Thick films
Issue Date
2014-01
Publisher
ELSEVIER SCI LTD
Citation
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.34, no.1, pp.43 - 49
Abstract
Thick films with compositions (1-x)(0.94Bi(1/2)Na(1/2)TiO(3)-0.06BaTiO(3))-x(K0.5Na0.5NbO3) (x = 0, 0.03, 0.09 and 0.18) have been prepared and their structural and electrical properties have been investigated. Dielectric properties show that these films are well suited for high-temperature applications due to their low variance in permittivity (<15%) over large temperature ranges. The thick film with x = 0.18 offers an operational temperature range from room temperature to 350 degrees C. Films with x = 0.03 and 0.09 also possess a stabile permittivity up to 400 degrees C. The improvement in the thermal stability of the permittivity is attributed to the addition of K0.5Na0.5NbO3 which leads to breaking of the long-range order in the materials. However, the polarizability of the materials was found to decrease possibly due to the clamping effect of the substrate. The characteristics of each film are discussed based on dielectric and electrical properties.
URI
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DOI
10.1016/j.jeurceramsoc.2013.07.020
ISSN
0955-2219
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MSE_Journal Papers
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