Phase transition and piezoelectric properties of lead-free (Bi1/2Na1/2)TiO3–BaTiO3 ceramics

Cho, Jeong‐Ho; Jeong, Young‐Hun; Nam, Joong-Hee; Yun, JiSun; Park, Yong-Joon

doi:10.1016/j.ceramint.2014.01.051

Cited by 57 publications

(27 citation statements)

References 48 publications

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“…Depolarization temperature (T d ) is a parameter that has not clearly been defined [10], but the European standard on piezoelectric properties has defined it as the reduction of remnant polarization because of temperature and other influences [21]. However, there are other definitions of T d such as the steep reduction of remnant polarization [7], or the phase transition temperature from ferroelectric (FE) to anti-ferroelectric (AFE) or to relaxor anti-ferroelectric or to relaxor [8,[22][23][24][25].…”

Section: Effects Of Extra Barium On Depolarization Temperaturementioning

confidence: 99%

“…Hence it is necessary to bring the phase transition temperature down to near room temperature (RT) for many applications, and that can be achieved by using various dopants [7]. In NBT-based systems, there is a weakly polar intermediate phase [8], which occurs between the depolarization temperature T d and the temperature of maximum permittivity (T m ) [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

Balakt

Shaw

Zhang

2016

J Mater Sci: Mater Electron

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Lead-free 0.94Na 0.5 Bi 0.5 TiO 3 -0.06Ba 1?x TiO 3 (NBT-0.06B 1?x T) ceramics (0.0 B x B 0.03) were synthesized by a conventional solid-state reaction process. X-ray diffraction shows that the compositions are at the morphotropic phase boundary where rhombohedral and tetragonal phase coexist. Grain size slightly changes with the increase of Ba 2? content and reaches the minimum at x = 0.02. The depolarization temperature (T d ) decreases with the extra Ba 2? content but the lowest T d was obtained at x = 0.01-0.02. The pyroelectric coefficient (p) was measured as a function of Ba 2? content, and increased from 2.90 9 10 -4 to 3.54 9 10 -4 C m -2°C-1 , and from 55.3 9 10 -4 to 740.7 9 10 -4 C m -2°C-1 for x = 0.00 and 0.02 at RT, and depolarization temperature (T d ) respectively. The pyroelectric coefficient (p) shows a large increase with rising the temperature and reaches the maximum value at the depolarization temperature (T d ). The figures of merits of F i , F v and F D have all been improved with the addition of extra barium. These improved pyroelectric properties indicate that NBT-0.06B 1?x T is a promising material for pyroelectric applications or a wide range of temperature.

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Section: Effects Of Extra Barium On Depolarization Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

Balakt

Shaw

Zhang

2016

J Mater Sci: Mater Electron

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“…Composition B has a bigger c/a ratio than all other compositions ( Table 1), indicating that Composition B has more tetragonality in its structure than all other compositions [13,43,44,46,47]. Importantly, at RT, the p values for nonstoichiometry compositions are higher than that of PZT and other lead-free compositions (Table 2) [7,19,27,32].…”

Section: Effects Of Nonstoichiometry Composition On Pyroelectric Propmentioning

confidence: 93%

“…1 [25][26][27][28]: where R A , R B , and R o are the ionic radius of ions which will occupy A, B sites, and the oxygen anion. The tolerance factor value of stable perovskite structure is in the range of 0.77-0.99 [27]. The average t value which has been calculated for the stoichiometry and nonstoichiometry compositions in this study is around 0.982, suggesting that all compositions illustrate stable structure.…”

Section: Resultsmentioning

confidence: 99%

“…Although depolarization temperature is an important parameter in pyroelectric study, its origin has not been fully understood for NBT-xBT. It has more than one definition [27,32,[34][35][36][37], which includes the phase transition temperature from ferroelectric (FE) to antiferroelectric (AFE) phases or from ferroelectric to relaxor [33,34,38,39].…”

Section: Effects Of Nonstoichiometry Composition On Depolarization Tementioning

confidence: 99%

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Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na x Bi y TiO3–0.06Ba z TiO3 ceramics

2017

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Nonstoichiometry lead-free 0.94Na x Bi y TiO 3 -0.06Ba z TiO 3 (N x B y T-0.06B z T) (from x = y = 0.5, z = 1.00 to x = 0.5, y = 0.534, z = 1.02) ceramic compositions were prepared by a conventional solid-state route. XRD shows that the compositions are at a morphotropic phase boundary where rhombohedral and tetragonal phases coexist. The depolarization temperature (T d ) can be lowered by modifying x, y and z. The pyroelectric coefficient (p) of nonstoichiometry N x B y T-0.06B z T compositions is greatly increased, compared with stoichiometry NBT-0.06BT composition, from 3.15 9 10 -4 C m -2°C-1 at room temperature (RT) and 23.9 9 10 -4 C m -10 m v -1 , 0.39 9 10 -10 m 2 C -1 and 138.7 9 10 -6 Pa -1/2 , respectively, at T d . The same composition also presents F C values which are *2.58 and *2.86 (910 -9 C cm -2°C-1 ) at RT at 100 and 1000 (Hz). N 0.5 B 0.534 T-0.06BT and N 0.5 B 0.534 T-0.06B 1.02 T compositions show a large p values at a wide temperature range. The enhanced pyroelectric properties make nonstoichiometry N 0.52 B 0.52 T-0.06BT composition a promising candidate for pyroelectric and other applications at wide temperatures range.

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Effect of sintering temperature of NBT–6BT lead-free ceramics on the structural, ferroelectric and piezoelectric properties

et al. 2022

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Phase transition and piezoelectric properties of lead-free (Bi1/2Na1/2)TiO3–BaTiO3 ceramics

Cited by 57 publications

References 48 publications

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na x Bi y TiO3–0.06Ba z TiO3 ceramics

Effect of sintering temperature of NBT–6BT lead-free ceramics on the structural, ferroelectric and piezoelectric properties

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