Role of Extrinsic Contribution to Temperature Stability of Piezoelectricity for (K,Na)NbO3-(Bi,M)ZrO3 Ceramics with Morphotropic Phase Boundary

Temperature stability of dielectric, ferroelectric, and piezoelectric properties were investigated in situ by choosing (K,Na)NbO3-(Bi,K)ZrO3 (KNN-BKZ), (K,Na)NbO3-(Bi,Na,K,Li)ZrO3 (KNN-BNKLZ), and (K,Na)NbO3-(Bi,Li)ZrO3-(KNN-BLZ) as representative ceramics with rhombohedral-orthorhombic-tetragonal (R-O-T), R-T, and enriched T phase boundaries, respectively. The KNN-BNKLZ ceramics, which have an R-T phase boundary, showed the highest piezoelectricity but the worst temperature stability. On the other hand, the KNN-BLZ ceramics, which have an enriched T-phase, were slightly worse in terms of piezoelectricity compared to the R-O-T or R-T phase boundary, but their thermal stability was the best. From analyses of an extrinsic contribution by a difference between the small signal d33 and εrPr and an intensity variation of the (002) and (200) X-ray diffraction peaks for the KNN-based ceramics, it was suggested that increasing the extrinsic contribution in the morphotropic phase boundary region improves the piezoelectricity but decreases the thermal stability.

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LOCAL MICROSTRUCTURE EVOLUTION OF BISMUTH SODIUM TITANATE-BASED LEAD-FREE PIEZOELECTRIC SYSTEMS ACROSS THE MORPHOTROPIC PHASE BOUNDARY REGION

Journal of Advanced Dielectrics ◽

10.1142/s2010135x12300125 ◽

2012 ◽

Vol 02 (04) ◽

pp. 1230012 ◽

Cited By ~ 4

Author(s):

YUN LIU ◽

RAY L. WITHERS ◽

JIAN WANG ◽

LASSE NORÉN ◽

ANDREW J. STUDER ◽

...

Keyword(s):

Phase Boundary ◽

Morphotropic Phase Boundary ◽

Piezoelectric Effect ◽

Piezoelectric Materials ◽

Sodium Titanate ◽

Boundary Region ◽

Lead Free ◽

In Situ Neutron Diffraction ◽

Piezoelectric Performance

Morphotropic phase boundary (MPB) containing piezoelectric systems generally exhibit enhanced piezoelectric performance at compositions within, or close to, the MPB region. The mechanism/s underlying such enhancement, however, are still contentious due to complex micro/nanostructure and apparently inherent local structural variability associated with octahedral tilt disorder/platelet precipitates in such piezoelectric materials. This paper reviews some recent structural analysis results from Bi0.5Na0.5TiO3 (BNT) and other binary, lead-free, piezoelectric materials systems derived from it via electron diffraction and in situ neutron diffraction. The results suggest that intrinsically existing local microstructure (LMS) in BNT essentially continues across the MPB region. The LMS, originating from inherent octahedral tilt disorder, is strongly temperature-, electric field-, pressure- and chemical composition-dependent, and may help to explain a series of phenomena observed in BNT-based binary materials systems, including the enhanced piezoelectric effect in the region of the MPB.

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Structural and electromechanical study of Bi0.5Na0.5TiO3-BaTiO3 solid-solutions

Processing and Application of Ceramics ◽

10.2298/pac1302073p ◽

2013 ◽

Vol 7 (2) ◽

pp. 73-80 ◽

Cited By ~ 11

Author(s):

Biswanath Parija ◽

Tanmaya Badapanda ◽

Pratap Sahoo ◽

Manoranjan Kar ◽

Pawan Kumar ◽

...

Keyword(s):

Solid Solution ◽

Raman Spectroscopy ◽

Phase Boundary ◽

Morphotropic Phase Boundary ◽

Solid Solutions ◽

Structural Changes ◽

Boundary Region ◽

X Ray Diffraction ◽

Conventional Solid State Reaction ◽

X Ray

Solid solution of (1-x)Bi0.5Na0.5TiO3-xBaTiO3 have been synthesized via conventional solid-state reaction route. Structural changes of the solid-solutions were investigated by using X-ray diffraction, Rietveld refinement Raman spectroscopy and piezoelectric studies. X-ray diffraction analysis shows a distinct 002/200 peak splitting appearing at x = 0.07 showing the coexistence of rhombohedral and tetragonal phase. Raman spectroscopy shows a splitting of (TO3) mode at x = 0.07 confirming the presence of the morphotropic phase boundary region. The dominant bands in the Raman spectra are analyzed by observing the changes in their respective peak positions, widths and intensities as the x increases. The piezoelectric properties of the solid solution increase with rise in BaTiO3 content and shows optimum value at x = 0.07 owing to the co-existence of two ferroelectric phases. Based on these results, it is suggested that the morphotropic phase boundary in the studied system lies in the composition x = 0.07.

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Enhanced Dielectric, Thermal Stability, and Energy Storage Properties in Compositionally Engineered Lead-Free Ceramics at Morphotropic Phase Boundary

Ceramics International ◽

10.1016/j.ceramint.2021.03.033 ◽

2021 ◽

Author(s):

R.L. Nayak ◽

Sadhwi S. Dash ◽

Yajun Zhang ◽

M.P.K. Sahoo

Keyword(s):

Thermal Stability ◽

Energy Storage ◽

Phase Boundary ◽

Morphotropic Phase Boundary ◽

Lead Free ◽

Lead Free Ceramics ◽

Energy Storage Properties ◽

Storage Properties

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Thermal stability and miscibility of co-evaporated methyl ammonium lead halide (MAPbX3, X = I, Br, Cl) thin films analysed by in situ X-ray diffraction

Journal of Materials Chemistry A ◽

10.1039/c8ta02775g ◽

2018 ◽

Vol 6 (24) ◽

pp. 11496-11506 ◽

Cited By ~ 19

Author(s):

Paul Pistor ◽

Thomas Burwig ◽

Carlo Brzuska ◽

Björn Weber ◽

Wolfgang Fränzel

Keyword(s):

Thin Films ◽

Thermal Stability ◽

Thermal Treatment ◽

Phase Evolution ◽

X Ray Diffraction ◽

Crystalline Phases ◽

X Ray ◽

Subsequent Thermal Treatment ◽

Lead Halide

We present the identification of crystalline phases by in situ X-ray diffraction during growth and monitor the phase evolution during subsequent thermal treatment of CH3NH3PbX3 (X = I, Br, Cl) perovskite thin films.

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Enhanced piezoelectric properties of (1 − x)BiFe0.98(Zn0.5Hf0.5)0.02O3-xBaTiO3 ceramics near the morphotropic phase boundary

Dalton Transactions ◽

10.1039/c9dt04664j ◽

2020 ◽

Vol 49 (17) ◽

pp. 5573-5580 ◽

Cited By ~ 1

Author(s):

Yunjing Shi ◽

Hairui Bai ◽

Fei Yan ◽

Rui Hu ◽

Kaikai Chen ◽

...

Keyword(s):

Phase Boundary ◽

Morphotropic Phase Boundary ◽

Piezoelectric Coefficient ◽

Piezoelectric Properties ◽

Phase Coexistence ◽

T Phase

The component with the R–T phase coexistence near MPB affords an optimal piezoelectric coefficient (d33) of 130 pC N−1.

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Phase Diagram of the W-doped Pb(Zn1/3Nb2/3)O3–BaTiO3– PbTiO3 System Around a Morphotropic Phase Boundary Composition

Journal of Materials Research ◽

10.1557/jmr.2002.0160 ◽

2002 ◽

Vol 17 (5) ◽

pp. 1085-1091 ◽

Cited By ~ 1

Author(s):

W. Z. Zhu ◽

M. Yan ◽

A. L. Kholkin ◽

P. Q. Mantas ◽

J. L. Baptista

Keyword(s):

High Temperature ◽

Phase Boundary ◽

Morphotropic Phase Boundary ◽

Room Temperature ◽

X Ray Diffraction ◽

X Ray ◽

Electrical Neutrality ◽

Phase Boundary Composition ◽

A Site ◽

Successive Phase

The morphotropic phase boundary (MPB) composition that is characterized by the coexistence of rhombohedral and tetragonal phases in the Pb(Zn1/3Nb2/3)O3–BaTiO3– PbTiO3 system was modified by W-doping at the B site of a perovskite structural block. To maintain the electrical neutrality, creation of A-site vacancies was intentionally introduced in the formulation of the examined compositions. Incorporation of W ions was revealed to stabilize the tetragonal phase against the rhombohedral one, shifting the MPB toward the PZN-rich end at room temperature. High-temperature x-ray diffraction examination in combination with dielectric measurements discloses two successive phase transitions as a sample is cooled from high temperature, namely, paraelectric cubic to ferroelectric rhombohedral followed by ferroelectric rhombohedral to ferroelectric tetragonal. W addition appears to suppress the first transition while promoting the second one.

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