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The (Pb(1-3x/2)Lax)(Zr0.5Sn0.3Ti0.2)O3(PLZST, 0.00≤x≤0.18)antiferroelectric ceramics were prepared by traditional ceramic process. The effect of La modification on phase structures, phase transition, and electrical properties of PLZST ceramics were investigated by X-ray diffraction, P-E hysteresis loop and dielectric spectroscopy. With the increase of La content x,the samples at room temperature are rhombohedral ferroelectric phase (x≤0.0.04),tetragonal antiferroelectric phase(AFEt, 0.06x≤0.0.08, and cubic phase (PE' cx≥0.1), respectively. The dielectric spectroscopy shows that with the increase of La content x, AFE-PE phase transformation temperature decreases, and for samples with La content x exceeding 0.12, strong dielectric frequency dispersion is observed around dielectric ε' and tanδ peaks. The peak temperatures Tm corresponding to the maxim dielectric constant shifts to higher temperatures with the increase of frequency, indicating that PLZST antiferroelectric transform to typical relaxors. The curves of dielectrics as functions of temperatures in the PLZST systems are fitted by a modified Curie–Weiss law proposed by Santos.
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Keywords:
- antiferroelectric ceramics /
- dielectric frequency dispersion /
- diffused phase transformation /
- dieelctric relaxtion
[1] Smolensky G A 1970 J. Phys. Soc. Japan 28 26
[2] 1255 (in Chinese) [冯玉军、 徐 卓、魏晓勇、姚 熹 2003 52 1255]
[3] Yao X, Chen Z L, Cross L E 1983 J. Appl. Phys. 54 3399
[4] Viehland D, Wutting M, Cross L E 1991 Ferroelectrics 120 71
[5] Zhang L Y, Yao X 1991 Dielectric Physics (Xi'an: Xi'an Jiaotong University Press) p487 (in Chinese) [张良莹、姚 熹 1991 电介质物理(西安: 西安交通大学出版社) 第487页]
[6] Xu Z, Dai X, Li J F 1996 Appl. Phys. Lett. 68 1628
[7] Liu P, Yang T Q, Xu Z 1998 Chin. Sci. Bull. 43 961
[8] Liu P, Yao X 2002 Acta Phys. Sin. 51 1621 (in Chinese) [刘 鹏、 姚 熹 2002 51 1621]
[9] Liu P, Zhang D 2008 Chin. Sci. Bull. 53 1755(in Chinese) [刘 鹏、 张 丹2008科学通报53 1755]
[10] Feng Y J, Xu Z, Wei X Y, Yao X 2003 Acta Phys. Sin. 52
[11] Xu G Y, Wen J S, Stock C, Gehring P M 2008 Nat. Mater. 7 562
[12] Kirilov V V, Isupov V A 1973 Ferroelectrics 5 3
[13] Martirena H T, Burfoot J C 1974 Ferroelectrics 7 151
[14] Lu S G, Xu Z Km Chen Haydn 2005 Appl. Phys. Lett. 86 142905
[15] Santos I A, Eiras J A 2001 J. Phys. Condens. Matter. 13 11733
[16] Chan W H, Xu Z, Hung T F 2004 J. Appl. Phys. 96 6606
[17] Dai X H, Viehland D 1994 J. Appl. Phys. 76 3701
[18] Berlincourt D 1968 IEEE Transaction on Sonics and Ultrasonics, Su-3, 116
[19] Chen I W 2000 J. Phys. Chem. Solids. 61 197
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[1] Smolensky G A 1970 J. Phys. Soc. Japan 28 26
[2] 1255 (in Chinese) [冯玉军、 徐 卓、魏晓勇、姚 熹 2003 52 1255]
[3] Yao X, Chen Z L, Cross L E 1983 J. Appl. Phys. 54 3399
[4] Viehland D, Wutting M, Cross L E 1991 Ferroelectrics 120 71
[5] Zhang L Y, Yao X 1991 Dielectric Physics (Xi'an: Xi'an Jiaotong University Press) p487 (in Chinese) [张良莹、姚 熹 1991 电介质物理(西安: 西安交通大学出版社) 第487页]
[6] Xu Z, Dai X, Li J F 1996 Appl. Phys. Lett. 68 1628
[7] Liu P, Yang T Q, Xu Z 1998 Chin. Sci. Bull. 43 961
[8] Liu P, Yao X 2002 Acta Phys. Sin. 51 1621 (in Chinese) [刘 鹏、 姚 熹 2002 51 1621]
[9] Liu P, Zhang D 2008 Chin. Sci. Bull. 53 1755(in Chinese) [刘 鹏、 张 丹2008科学通报53 1755]
[10] Feng Y J, Xu Z, Wei X Y, Yao X 2003 Acta Phys. Sin. 52
[11] Xu G Y, Wen J S, Stock C, Gehring P M 2008 Nat. Mater. 7 562
[12] Kirilov V V, Isupov V A 1973 Ferroelectrics 5 3
[13] Martirena H T, Burfoot J C 1974 Ferroelectrics 7 151
[14] Lu S G, Xu Z Km Chen Haydn 2005 Appl. Phys. Lett. 86 142905
[15] Santos I A, Eiras J A 2001 J. Phys. Condens. Matter. 13 11733
[16] Chan W H, Xu Z, Hung T F 2004 J. Appl. Phys. 96 6606
[17] Dai X H, Viehland D 1994 J. Appl. Phys. 76 3701
[18] Berlincourt D 1968 IEEE Transaction on Sonics and Ultrasonics, Su-3, 116
[19] Chen I W 2000 J. Phys. Chem. Solids. 61 197
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