-Substitution on the Ferroelectric and Piezoelectric Properties of BiFeO

Effects of Bi(Zn

Ta

)O

-Substitution on the Ferroelectric and Piezoelectric Properties of BiFeO

-BaTiO

Ceramics

Jin Su Park · Myang Hwan Lee · Da Jeong Kim · Myong-Ho Kim · Tae Kwon Song

School of Materials Science and Engineering, Changwon National University, Changwon 641-773, Korea

Sung Jin Han · Won-Jeong Kim

Department of Physics, Changwon National University, Changwon 641-773, Korea

Dalhyun Do

Department of Advanced Materials Engineering, Keimyung University, Daegu 704-701, Korea (Received 20 April 2015 : revised 7 June 2015 : accepted 23 June 2015)

Lead-free ceramics with compositions of (1-x)[0.67Bi1.05FeO3-0.33BaTiO3]-xBi(Zn2/3Ta1/3)O3(x

=0.00, 0.01, 0.02, 0.03, 0.04 and 0.05) [BF-BT-BZTx] were prepared through a conventional solid- state reaction method. The effects of BZT substitution on the crystal structural, microstructural, piezoelectric and electrical properties of the ceramics were investigated. The X-ray diffraction patterns showed that all ceramics were crystallized with the perovskite phase. The grain size decreased with increasing BZT content. For x = 0.02, good ferroelectric and piezoelectric properties were observed: 2Pr= 42 µC/cm²and 2Ec= 55 kV/cm. The static- and the dynamic-piezoelectric constants were observed to be 130 pC/N and 290 pm/V, respectively.

PACS numbers: 77.65.-j, 77.65.Ly, 77.80.-e, 77.84.Dy

Keywords: Piezoelectric, Ferroelectric, Lead-free, BiFeO3, BaTiO3

Bi(Zn

Ta

)O

V ò ÿT &  BiFeO

-BaTiO

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±úš> [jb” (1-x)[0.67Bi1.05FeO3-0.33BaTiO3]-xBi(Zn2/3Ta1/3)O3 (x = 0.00, 0.01, 0.02, 0.03, 0.04 and 0.05) [BF-BT-BZTx]`¦ {9ìøÍ&h“ “¦©œìøÍ6£xZO`¦6s x #Œ ]j›¸ %i. BZT u¨8Š`¦ :Ÿx #Œ



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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.



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PACS numbers: 77.65.-j, 77.65.Ly, 77.80.-e, 77.84.-s Keywords:·úš„^‰, y©œÄ»„^‰, q±úš>[jb”, BiFeO3, BaTiO3

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º e”#Q ƒ½¨ %i. (1-x)[0.67Bi1.05FeO₃-0.33BaTiO₃]- xBi(Zn2/3Ta1/3)O3(x = 0.00, 0.01, 0.02, 0.03, 0.04, 0.05, BF-BT-BZTx)_ ›¸$íܼ–Ð &½ñ¨›¸, p½¨›¸, y©œÄ»„

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∗E-mail: [email protected]

II. ÷ m Ç] M ö U ê s0 n É

BF-BT-BZTx (x = 0.00, 0.01, 0.02, 0.03, 0.04, 0.05) [

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Fig. 1. (Color online) X-ray diffraction patterns of BF- BT-BZTx ceramics.

Fig. 2. SEM microstructure images of (a) BF-BT- BZT0.00, (b) BF-BT-BZT0.01, (c) BF-BT-BZT0.02, (d) BF-BT-BZT0.03, (e) BF-BT-BZT0.04, and (f) BF-BT- BZT0.05.

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Fig. 3. (Color online) (a) Bipolar strain vs. electric field (S − E) loops BF-BT-BZTx ceramics and (b) static piezoelectric constant (d33) and dynamic piezoelectric constant (d33 ∗) of BF-BT-BZTx ceramics.

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3ܼ
, BZT 0.02 mol`¦u¨8Š %i`¦M: 290 pm/V–Ð $í 0

p

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Fig. 4H BF-BT-BZTx [jb”_ 65 kV/cm „l©œ\

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BF-BT-BZT0.02\"f ©œ HïߖÀÓìrFG°úכ(2P^r)“ €• 42 µC/cm² °úכ`¦
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Fig. 5. (Color online) Temperature dependent dielectric constants of BF-BT-BZTx ceramics at a frequency of 10 kHz.

›

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