Phase transition, dielectric and piezoelectric properties of NaNbO3–Bi0.5Li0.5TiO3 lead-free ceramics

Fu, Lingling; Lin, Dunmin; Zheng, Qiaoji; Wu, Xiaodong; Wu, Lei; Sun, Hailing; Wan, Yang; Fan, Ximing; Xu, Cheng

doi:10.1016/j.cap.2012.04.032

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…1 (b), it can be clearly seen that the (200) and (002) peaks gradually merge into one single broad peak at x= 0.07, indicating that an introduction of BZT gradually changes the symmetry from orthorhombic to pseudo-cubic. Similar results were also observed in the NaNbO 3 -Bi 0.5 Li 0.5 TiO 3 [18] and NaNbO 3 -Bi 0.5 K 0.5 TiO 3 [19] systems as well.…”

Section: X-ray Diffraction and Lattice Parametersupporting

confidence: 89%

“…Therefore, the shift in T m as BZT was added could be attributed to a weakening of the bonding in the B-site octahedral network after a substitution of a larger effective B-site ion (Zn 2+ +Ti 4+ , r effective (0.673 Å)) for Nb 5+ (r (Nb5+)~0 .64 Å) [25]. The decrease in T max has been observed in other perovskite systems including Ba(Zr x Ti 1-x )O 3, BiScO 3 -Bi(Zn 0.5 Ti 0.5 )O 3 -BaTiO 3 [26] and NaNbO 3 -Bi 0.5 Li 0.5 TiO 3 [18] Figure 4 shows the trend in T max (determined from the maximum permittivity at 10 kHz) as a function of BZT content. According to Raevski and Prosandee, NaNbO 3 -based solid solutions can be divided into two groups [27].…”

Section: X-ray Diffraction and Lattice Parametermentioning

confidence: 88%

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Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Prasertpalichat

Cann

2014

J Electroceram

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Ceramics based on the perovskite solid solution (1-x) NaNbO 3 -xBi (Zn 0.5 Ti 0.5 ) O 3 were prepared using conventional solid state synthesis. The crystal structure, electrical, and optical properties were examined. According to diffraction data, a single perovskite phase could be identified up to the composition x=0.09. As the Bi (Zn 0.5 Ti 0.5 ) O 3 content increased the crystal structure transitioned from orthorhombic to pseudocubic symmetry. Furthermore, dielectric data showed that the dielectric maximum shifted to lower temperatures with the addition of Bi (Zn 0.5 Ti 0.5 ) O 3 . Polarization hysteresis data revealed a slim linear loop across the whole range of solid solutions. Optical data also showed a decrease in the optical band gap from 3.4 eV for pure NaNbO3 to 2.9 eV for the x=0.09 composition. Using impedance spectroscopy, an electrically inhomogeneous microstructure was observed for compositions with increased Bi (Zn 0.5 Ti 0.5 ) O 3 content. Finally, the substitution of Ta on the B-site was shown to shift the dielectric maximum to temperatures as low as 100 K.

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Section: X-ray Diffraction and Lattice Parametersupporting

confidence: 89%

Section: X-ray Diffraction and Lattice Parametermentioning

confidence: 88%

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Prasertpalichat

Cann

2014

J Electroceram

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“…Noteworthy, the phase transition between ferroelectric and paraelectric becomes more diffuse with the increase in BBKT content, indicating the disturbance of ferroelectric long‐range order and formation of polar nano‐regions due to cation disorder in A‐ and B‐sites. This similar phenomenon also existed in other NaNbO 3 ‐based systems including NaNbO 3 –Bi 0.5 Li 0.5 TiO 3 , NaNbO 3 –Na 0.5 Bi 0.5 TiO 3 , and NaNbO 3 –Bi(Zn 0.5 Ti 0.5 )O 3 …”

Section: Resultssupporting

confidence: 78%

“…This similar phenomenon also existed in other NaNbO 3 -based systems including NaNbO 3 -Bi 0.5 Li 0.5 TiO 3 , NaNbO 3 -Na 0.5 Bi 0.5 TiO 3 , and NaNbO 3 -Bi(Zn 0.5 Ti 0.5 ) O 3 . [39][40][41] As a matter of fact, most pyroelectric materials include AC-coupled detectors which work at relatively low frequency. 42 Thus, the frequency stability of pyroelectric materials is crucially important to practical application.…”

Section: Temperature and Frequency Dependence Of Dielectric Characteristicsmentioning

confidence: 99%

Significantly enhanced pyroelectric performance in novel sodium niobate‐based lead‐free ceramics by compositional tuning

et al. 2019

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In this study, (1 − x)NaNbO3–xBa0.6(Bi0.5K0.5)0.4TiO3 (abbreviated as NN‐xBBKT, x = 0.05, 0.10, 0.15, and 0.20) lead‐free pyroelectric ceramics were synthesized by conventional solid‐state reaction method. Moreover, their microstructure, phase structure, dielectric, ferroelectric, piezoelectric, and pyroelectric characteristics were studied systematically. The X‐ray diffraction result showed that the phase structure of NN‐xBBKT ceramics changed from orthorhombic to tetragonal and finally became pseudocubic symmetry. The ferroelectric‐paraelectric phase transition temperature and depolarization temperature shifted to lower temperature with the increase in BBKT content. Furthermore, with increasing BBKT content, piezoelectric coefficient, figures of merit, and pyroelectric coefficient first increased and then decreased. The optimum pyroelectric properties (eg Fd = 0.81 × 10−5 Pa−1/2, Fv = 1.02 × 10−2 m2 C−1, Fi = 1.04 × 10−10 m V−1, and p = 3.11 × 10−8 C cm−2 K−1) were observed in sample composition with x = 0.15. More importantly, the pyroelectric coefficient of ceramic with x = 0.15 also displayed relatively high thermal stability because of high depolarization temperature (~110°C). These parameters demonstrate that the novel Pb‐free NaNbO3‐based ceramics form an important class of pyroelectric material with broad range of application prospect.

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“…However, pure KNN piezoelectric ceramic sintered by the traditional ceramic preparation process is difficult to obtain dense ceramic body [16][17][18][19][20]. These difficulties are concerned with a narrow temperature range of sintering, the volatilization of K and Na, a poling barrier result from high loss tangent and the evolution of secondary phases [21][22][23].…”

Section: Introductionmentioning

confidence: 97%

Structure and electrical properties of K0.5Na0.5Nb0.94−Sb0.06Sn O3 lead-free piezoelectric ceramics

Yin

Sun

Zhang

et al. 2015

Journal of Alloys and Compounds

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Phase transition, dielectric and piezoelectric properties of NaNbO3–Bi0.5Li0.5TiO3 lead-free ceramics

Cited by 10 publications

References 20 publications

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Significantly enhanced pyroelectric performance in novel sodium niobate‐based lead‐free ceramics by compositional tuning

Structure and electrical properties of K0.5Na0.5Nb0.94−Sb0.06Sn O3 lead-free piezoelectric ceramics

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