Diffusion phase transition and dielectric characteristics of Bi0.5Na0.5TiO3-Ba(Hf,Ti)O3lead-free ceramics

H. Y. Tian; D. Y. Wang; D. M. Lin; J. T. Zeng; Kin Wing Kwok; H. L.W. Chan

doi:10.1016/j.ssc.2007.01.043

Diffusion phase transition and dielectric characteristics of Bi_0.5Na_0.5TiO₃-Ba(Hf,Ti)O₃lead-free ceramics

H. Y. Tian, D. Y. Wang, D. M. Lin, J. T. Zeng, Kin Wing Kwok, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

40 Citations (Scopus)

Abstract

Lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT)-barium hafnate titanate (Ba(Hf0.05,Ti0.95)O3, BHT5) were prepared by a two-step sintering process. The BNT-BHT5 ceramics sintered at 1180 {ring operator}C for 2 h in air showed a pure perovskite structure. The results show that the phase transition temperature (Tm) is suppressed dramatically with a small amount of BHT5 content and then decreased gradually with more BHT5 in the compounds. The diffusion of the phase transition is more distinct for the samples around the morphotropic phase boundary (MPB) of BNT-BHT5 system. In the (1-x)BNT-xBHT5 system, high piezoelectric constants were obtained at x = 0.08, which is a tetragonal phase near the MPB region. The BNT-BHT5 system is expected to be a new and promising candidate for lead-free dielectric and piezoelectric ceramics.

Original language	English
Pages (from-to)	10-14
Number of pages	5
Journal	Solid State Communications
Volume	142
Issue number	1-2
DOIs	https://doi.org/10.1016/j.ssc.2007.01.043
Publication status	Published - 1 Mar 2007

Keywords

A. Bi Na TiO -BaHf Ti O 0.5 0.5 3 0.05 0.95 3
D. Diffusion phase transition
D. Morphotropic phase boundary

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

More information

10.1016/j.ssc.2007.01.043

Cite this

@article{1714d387ddcb4434aa74fa5ac22d036b,

title = "Diffusion phase transition and dielectric characteristics of Bi0.5Na0.5TiO3-Ba(Hf,Ti)O3lead-free ceramics",

abstract = "Lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT)-barium hafnate titanate (Ba(Hf0.05,Ti0.95)O3, BHT5) were prepared by a two-step sintering process. The BNT-BHT5 ceramics sintered at 1180 {ring operator}C for 2 h in air showed a pure perovskite structure. The results show that the phase transition temperature (Tm) is suppressed dramatically with a small amount of BHT5 content and then decreased gradually with more BHT5 in the compounds. The diffusion of the phase transition is more distinct for the samples around the morphotropic phase boundary (MPB) of BNT-BHT5 system. In the (1-x)BNT-xBHT5 system, high piezoelectric constants were obtained at x = 0.08, which is a tetragonal phase near the MPB region. The BNT-BHT5 system is expected to be a new and promising candidate for lead-free dielectric and piezoelectric ceramics.",

keywords = "A. Bi Na TiO -BaHf Ti O 0.5 0.5 3 0.05 0.95 3, D. Diffusion phase transition, D. Morphotropic phase boundary",

author = "Tian, {H. Y.} and Wang, {D. Y.} and Lin, {D. M.} and Zeng, {J. T.} and Kwok, {Kin Wing} and Chan, {H. L.W.}",

year = "2007",

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T1 - Diffusion phase transition and dielectric characteristics of Bi0.5Na0.5TiO3-Ba(Hf,Ti)O3lead-free ceramics

AU - Tian, H. Y.

AU - Wang, D. Y.

AU - Lin, D. M.

AU - Zeng, J. T.

AU - Kwok, Kin Wing

AU - Chan, H. L.W.

PY - 2007/3/1

Y1 - 2007/3/1

N2 - Lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT)-barium hafnate titanate (Ba(Hf0.05,Ti0.95)O3, BHT5) were prepared by a two-step sintering process. The BNT-BHT5 ceramics sintered at 1180 {ring operator}C for 2 h in air showed a pure perovskite structure. The results show that the phase transition temperature (Tm) is suppressed dramatically with a small amount of BHT5 content and then decreased gradually with more BHT5 in the compounds. The diffusion of the phase transition is more distinct for the samples around the morphotropic phase boundary (MPB) of BNT-BHT5 system. In the (1-x)BNT-xBHT5 system, high piezoelectric constants were obtained at x = 0.08, which is a tetragonal phase near the MPB region. The BNT-BHT5 system is expected to be a new and promising candidate for lead-free dielectric and piezoelectric ceramics.

AB - Lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT)-barium hafnate titanate (Ba(Hf0.05,Ti0.95)O3, BHT5) were prepared by a two-step sintering process. The BNT-BHT5 ceramics sintered at 1180 {ring operator}C for 2 h in air showed a pure perovskite structure. The results show that the phase transition temperature (Tm) is suppressed dramatically with a small amount of BHT5 content and then decreased gradually with more BHT5 in the compounds. The diffusion of the phase transition is more distinct for the samples around the morphotropic phase boundary (MPB) of BNT-BHT5 system. In the (1-x)BNT-xBHT5 system, high piezoelectric constants were obtained at x = 0.08, which is a tetragonal phase near the MPB region. The BNT-BHT5 system is expected to be a new and promising candidate for lead-free dielectric and piezoelectric ceramics.

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KW - D. Diffusion phase transition

KW - D. Morphotropic phase boundary

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