NDLI: Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na$_{ x }$Bi$_{ y }$TiO$_{3}$–0.06Ba$_{ z }$TiO$

Content Provider	Springer Nature Link
Author	Balakt, A. M. Shaw, C. P. Zhang, Qi
Copyright Year	2017
Abstract	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 × 10$^{−4}$ C m$^{−2}$ °C$^{−1}$ at room temperature (RT) and 23.9 × 10$^{−4}$ C m$^{−2}$ °C$^{−1}$ at T $_{d}$, and reaches maxima of 6.99 × 10$^{−4}$ C m$^{−2}$ °C$^{−1}$ at RT and 75.3 × 10$^{−4}$ C m$^{−2}$ °C$^{−1}$ at T $_{d}$ for x = y = 0.52 and z = 1. The figures of merits, F $_{i}$, F $_{v}$, and F $_{D}$, also have been improved from 1.12 × 10$^{−10}$ m v$^{−1}$ and 0.021 m$^{2}$ C$^{−1}$ to 2.50 × 10$^{−10}$ m v$^{−1}$, 0.047 m$^{2}$ C$^{−1}$ and 16.63 × 10$^{−6}$ Pa$^{−1/2}$, respectively, for N$_{0.52}$B$_{0.52}$T–0.06BT composition at RT. Furthermore, N$_{0.52}$B$_{0.52}$T–0.06BT composition shows a huge enhancement in F $_{i}$, F $_{v}$ and F $_{D}$ to 26.9 × 10$^{−10}$ m v$^{−1}$, 0.39 × 10$^{−10}$ m$^{2}$ C$^{−1}$ and 138.7 × 10$^{−6}$ Pa$^{−1/2}$, respectively, at T $_{d}$. The same composition also presents F $_{C}$ values which are ~2.58 and ~2.86 (×10$^{−9}$ 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.
Starting Page	7382
Ending Page	7393
Page Count	12
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	52
Issue Number	12
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2017-03-08
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography and Scattering Methods Classical Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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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

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

Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0 . 94 Na x Bi y TiO 3 – 0 . 06 Ba z TiO

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Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na$_{ x }$Bi$_{ y }$TiO$_{3}$–0.06Ba$_{ z }$TiO$_{3}$ ceramics

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