Structure, microstructure and electrical properties of Cu2+ doped (K,Na,Li)(Nb,Ta,Sb)O3 piezoelectric ceramics

Rubio-Marcos, Fernando; Reinosa, J.J.; Vendrell, Xavier; Romero, J. J.; Mestres, L.; Leret, Pilar; Fernández, J.F.; Marchet, Pascal

doi:10.1016/j.ceramint.2012.10.270

Cited by 45 publications

(32 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the electric fieldinduced strain in ceramics is caused by polarization. However, this large strain is not caused solely by the polarization, and the coexistence of different polarization states in the applied electric field should also be responsible for this behavior [26,27]. Therefore, the results on P-E hysteresis and S-E loops obtained suggest that this large electric field-induced strain at x = 0.8 mol% is caused by mixed contributions of both ferroelectric phases under an electric field.…”

Section: Temperature Stabilitiesmentioning

confidence: 61%

Electrical properties and low temperature sintering of BiAlO3 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoelectric ceramics

Chao

Wang

Wei

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

1 -x)(Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 -xBiAlO 3 ((1 -x)BCZT-xBAO) piezoelectric ceramics were synthesized by a solid-state reaction method. Effects of BAO content on the sintering temperature, phase structure, microstructure and electrical properties of BCZT ceramics were investigated. X-ray diffraction revealed a phase transition from orthorhombic to tetragonal phases at x = 0.3-1.0 mol%. The grain size gradually becomes smaller with increasing the BAO content. It was observed that the introduction of BAO content not only decreased the sintering temperature from 1450 to 1300°C but also enhanced the electrical properties and temperature stability. The favorable electrical properties (d 33 = 568 pC/N, k p = 0.54, P r = 8.17 lC/cm 2 , E c = 3.45 kV/cm, e m = 13,298, e r = 3375, tand = 0.021, T c = 72°C and S = 0.06 %) were demonstrated for the BCZT based ceramics sintered at 1300°C with x = 0.8 mol%. These results indicated that the ceramics sintered at low temperatures was promising for piezoelectric applications.

show abstract

Section: Temperature Stabilitiesmentioning

confidence: 61%

Electrical properties and low temperature sintering of BiAlO3 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoelectric ceramics

Chao

Wang

Wei

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…It is believed that these elements induce, respectively, soft and hard piezoelectric behaviors. In particular, it has been proposed that the Cu 2+ may occupy both the A and B sites in the perovskite lattice, leading to opposite behaviors in their electrical properties [32,33]. …”

Section: Introductionmentioning

confidence: 99%

“…For higher x values, T m increases with x increasing. Moreover, an elevated dielectric constant is observed for the majority of the compounds, which is highest (ε′ max = 9500) for x = 0.90 [14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41]. Considering all these aspects, i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compositional Design of Dielectric, Ferroelectric and Piezoelectric Properties of (K, Na)NbO3 and (Ba, Na)(Ti, Nb)O3 Based Ceramics Prepared by Different Sintering Routes

et al. 2016

View full text Add to dashboard Cite

Lead free piezoelectric materials are being intensively investigated in order to substitute lead based ones, commonly used in many different applications. Among the most promising lead-free materials are those with modified NaNbO3, such as (K, Na)NbO3 (KNN) and (Ba, Na)(Ti, Nb)O3 (BTNN) families. From a ceramic processing point of view, high density single phase KNN and BTNN ceramics are very difficult to sinter due to the volatility of the alkaline elements, the narrow sintering temperature range and the anomalous grain growth. In this work, Spark Plasma Sintering (SPS) and high-energy ball milling (HEBM), following heat treatments (calcining and sintering), in oxidative (O2) atmosphere have been used to prepare single phase highly densified KNN (“pure” and Cu2+ or Li1+ doped), with theoretical densities ρth > 97% and BTNN ceramics (ρth ~ 90%), respectively. Using BTTN ceramics with a P4mm perovskite-like structure, we showed that by increasing the NaNbO3 content, the ferroelectric properties change from having a relaxor effect to an almost “normal” ferroelectric character, while the tetragonality and grain size increase and the shear piezoelectric coefficients (k15, g15 and d15) improve. For KNN ceramics, the results reveal that the values for remanent polarization as well as for most of the coercive field are quite similar among all compositions. These facts evidenced that Cu2+ may be incorporated into the A and/or B sites of the perovskite structure, having both hardening and softening effects.

show abstract

“…It is also possible to increase P r over the values of the classical randomly oriented ceramics by the processing of textured ceramics oriented in the poling direction. In ferroelectric ceramics, electric field-induced structural transitions have been observed [15,16,17,18,19]. Of particular interest for strain derived applications are those in Bi 0.5 Na 0.5 TiO 3 (BNT)-based compositions that take place from a weakly polar cubic pseudo- symmetry to ferro-piezoelectrically active phases of lower symmetry.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectrics under the Synchrotron Light: A Review

et al. 2015

View full text Add to dashboard Cite

Currently, an intensive search for high-performance lead-free ferroelectric materials is taking place. ABO3 perovskites (A = Ba, Bi, Ca, K and Na; B = Fe, Nb, Ti, and Zr) appear as promising candidates. Understanding the structure–function relationship is mandatory, and, in this field, the roles of long- and short-range crystal orders and interactions are decisive. In this review, recent advances in the global and local characterization of ferroelectric materials by synchrotron light diffraction, scattering and absorption are analyzed. Single- and poly-crystal synchrotron diffraction studies allow high-resolution investigations regarding the long-range average position of ions and subtle global symmetry break-downs. Ferroelectric materials, under the action of electric fields, undergo crystal symmetry, crystallite/domain orientation distribution and strain condition transformations. Methodological aspects of monitoring these processes are discussed. Two-dimensional diffraction clarify larger scale ordering: polycrystal texture is measured from the intensities distribution along the Debye rings. Local order is investigated by diffuse scattering (DS) and X-ray absorption fine structure (XAFS) experiments. DS provides information about thermal, chemical and displacive low-dimensional disorders. XAFS investigation of ferroelectrics reveals local B-cation off-centering and oxidation state. This technique has the advantage of being element-selective. Representative reports of the mentioned studies are described.

show abstract

Structure, microstructure and electrical properties of Cu2+ doped (K,Na,Li)(Nb,Ta,Sb)O3 piezoelectric ceramics

Cited by 45 publications

References 33 publications

Electrical properties and low temperature sintering of BiAlO3 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoelectric ceramics

Electrical properties and low temperature sintering of BiAlO3 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoelectric ceramics

Compositional Design of Dielectric, Ferroelectric and Piezoelectric Properties of (K, Na)NbO3 and (Ba, Na)(Ti, Nb)O3 Based Ceramics Prepared by Different Sintering Routes

Ferroelectrics under the Synchrotron Light: A Review

Contact Info

Product

Resources

About