2013
DOI: 10.7567/jjap.52.07hb02
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Formation of Morphotropic Phase Boundary in (Na0.5K0.5)NbO3–BaZrO3–(Bi0.5Li0.5)TiO3 Lead-Free Piezoelectric Ceramics

Abstract: For the development of lead-free piezoelectric ceramics, which have a tetragonal–rhombohedral morphotropic phase boundary (MPB), 0.90(Na0.5K0.5)NbO3–xBaZrO3–(0.10 - x)(Bi0.5Li0.5)TiO3 ceramics have been synthesized by the conventional solid state reaction method. A phase diagram was summarized from the X-ray diffraction pattern and the dielectric measurements. It is found that 0.90(Na0.5K0.5)NbO3–xBaZrO3–(0.10 - x)(Bi0.5Li0.5)TiO3 ceramics have an MPB between x = 0.07 and 0.08. In the vicinity of the MPB, it w… Show more

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Cited by 26 publications
(7 citation statements)
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“…23 Alternatively, efforts have been made to reduce the concentration of intrinsic defects to prevent domain pinning due to agglomeration from repeated cycling. 14 It is well recognized that either the PPT 23,24 or MPB 7,25 effect is indispensable for enhancing piezoelectricity in KNN-based ceramics. Thus, at first glance it seems to be contradictory to deliver both promising piezoelectric performance and high fatigue resistance in the KNN system via the first method.…”
mentioning
confidence: 99%
“…23 Alternatively, efforts have been made to reduce the concentration of intrinsic defects to prevent domain pinning due to agglomeration from repeated cycling. 14 It is well recognized that either the PPT 23,24 or MPB 7,25 effect is indispensable for enhancing piezoelectricity in KNN-based ceramics. Thus, at first glance it seems to be contradictory to deliver both promising piezoelectric performance and high fatigue resistance in the KNN system via the first method.…”
mentioning
confidence: 99%
“…[85,93] Other workers have also found that the room-temperature Raman spectra of similar BaZrO 3 -containing KNN solid solutions could not be identified as rhombohedral KNN even though XRD identified the phase as rhombohedral. [94] Broadening of these modes may be caused by increased disorder on the crystal lattice due to the formation of a solid solution with (Bi 0.5 Na 0.5 Zr 0.85 Sn 0.15 )O 3 . [95,96] If it is assumed that the lowest temperature phase of the KNN-BNZS single crystal is still rhombohedral, then the anomalies in the Raman spectra between À50 °C and 0 °C may indicate the rhombohedral-tetragonal phase transition (or the beginning of a rhombohedralorthorhombic-tetragonal phase transition).…”
Section: Resultsmentioning
confidence: 99%
“…Known as a promising lead‐free representative, KNN possesses PZT‐like piezoelectric performance. Strategies like constructing composition at polymorphism phase transition (PPT) and morphotropic phase boundary (MPB) region, are utilized in KNN to realize high piezoelectricity. It seems that the composition structure of KNN has been getting complex along the journey to ultrahigh piezoelectric performance.…”
Section: Introductionmentioning
confidence: 99%