BROWSE

Related Researcher

Author's Photo

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

ITEM VIEW & DOWNLOAD

Local structure change evidenced by temperature-dependent elastic measurements: Case study on Bi1/2Na1/2TiO3-based lead-free relaxor piezoceramics

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Local structure change evidenced by temperature-dependent elastic measurements: Case study on Bi1/2Na1/2TiO3-based lead-free relaxor piezoceramics
Author
Dittmer, RobertJo, WookWebber, Kyle G.Jones, Jacob L.Roedel, Juergen
Keywords
PHASE-TRANSITIONS; FERROELECTRIC CERAMICS; SOLID-SOLUTION; INTERNAL STRAIN; BARIUM-TITANATE; MECHANICAL LOSS; YOUNGS MODULUS; DOMAIN-WALLS; BEHAVIOR; DIFFRACTION
Issue Date
2014-02
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.115, no.8, pp.1 - 7
Abstract
The temperature-dependent Young's modulus Y(T) of the lead-free piezoceramics of 0.8Bi(1/2)Na(1/2)TiO(3)-0.2Bi(1/2)K(1/2)TiO(3) (20BKT) and 0.96(0.8Bi(1/2)Na(1/2)TiO(3)-0.2Bi(1/2)K(1/2)TiO(3))-0.04 BiZn1/2Ti1/2O3 (4BZT) is measured with the impulse excitation technique and contrasted with corresponding dielectric and structural data. While the dielectric properties suggest a phase transition, the high resolution XRD patterns remain virtually unchanged from room temperature up to high temperatures, confirming no change in their long-range order. In contrast, the elastic properties indicate a broad and diffuse ferroelastic transition denoted by a minimum in Y(T). By analogy to the elastic and dielectric data of PbZrxTi1-xO3 and PLZT, it is concluded that 20BKT and 4BZT are relaxors with polar nanoregions embedded in a metrically cubic matrix. Interestingly, no indication for the freezing temperature was reflected in any of the employed measurement techniques. From the saturation of Y(T), it is suggested that the Burns temperature may be approximated as 700 degrees C. Moreover, it is found that the modification with the ternary end-member BiZn1/2Ti1/2O3 results in an increase in Young's modulus. A comparison with the Bi1/2Na1/2TiO3-BaTiO3-K0.5Na0.5NbO3 yields the same results.
URI
https://scholarworks.unist.ac.kr/handle/201301/10166
DOI
10.1063/1.4866092
ISSN
0021-8979
Appears in Collections:
MSE_Journal Papers
Files in This Item:
000332619600065.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU