A-site Effects on the Dielectric and the Piezoelectric Properties of (Na0.50+xK0.50.x)(Nb0.55Ta0.45)O3 Ceramics

다국어 초록 (Multilingual Abstract)

(Na0.5+xK0.5−x)(Nb0.55Ta0.45)O3 (NKNT) ceramics prepared by using a solid state process were investigated for various A-site ratios between Na and K at 0 ≤ x ≤ 0.05 to determine the morphotropic phase boundary (MPB). Within the compositional range tested, X-ray diffraction patterns showed NKNT perovskite peaks with no apparent secondary peaks. Scanning electron microscope images showed little difference among microstructures composed of cube-like grains. The piezoelectric coefficient (d33) was enhanced up to 310 pC/N at x = 0.03 from 262 pC/N at x = 0 and then decreased with further increases in x while the polymorphic phase transition (PPT) temperature (TO−T) located around room temperature varied little with x. As a result, the increase that occurred in d33 was mainly due to the MPB effects with the MPB composition of the NKNT ceramics at (Na0.53K0.47).

참고문헌 (Reference)

1 B. Jaffe, 25 : 809-, 1954

2 G. H. Ryu,

3 E. K. Akdongan, 92 : 112908-, 2008

4 Z. Yang, 90 : 042911-, 2007

5 Y. Chang, 105 : 054101-, 2009

6 Y. Dai, 94 : 042905-, 2009

7 J. L. Zhang, 95 : 022909-, 2009

8 V. J. Tennery, 39 : 4749-, 1968

9 S. Triebwasser, 114 : 63-, 1959

10 Y. Watanabe, 47 : 3356-, 2008

11 H. Y. Park, 104 : 034103-, 2008

12 Y. Guo, 59 : 241-, 2005

13 Y. G. Lv, 44 : 284-, 2008

14 Y. Guo, 85 : 4121-, 2004

15 M. Matsubara, 97 : 114105-, 2005

16 T. A. Skidmore, 94 : 222902-, 2009

17 P. Zhao, 91 : 172901-, 2007

18 Y. S. Sung,

19 Y. Saito, 432 : 84-, 2004