Dielectric and piezoelectric properties of lead-free 0.95(K0.5Na0.5)NbO3–0.05LiNbO3 crystals grown by the Bridgman method

Chen, Kai; Xu, Guisheng; Yang, Danni; Wang, Xiaofeng; Li, Junbao

doi:10.1063/1.2562464

Cited by 98 publications

(76 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] In order to further enhance the piezoelectric properties, different dopants, such as Li þ , Ta 5þ or single crystal growths have been considered, [3][4][5][6][7] in which the 0.5%MnO 2 -(K 0.5 Na 0.5 )NbO 3 (Mn-KNN) single crystals show higher piezoelectric/dielectric properties than those of pure (K 0.5 Na 0.5 )NbO 3 material, with comparable orthorhombic to tetragonal phase transition temperature and Curie temperature. [8][9][10][11][12] Domain size engineering is another important approach for obtaining enhanced piezoelectric properties in lead free piezoelectric single crystals.…”

Section: Introductionmentioning

confidence: 99%

Domain size engineering in 0.5%MnO2-(K0.5Na0.5)NbO3 lead free piezoelectric crystals

Lin

Zhang

Cai

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

The piezoelectric property of [001]-oriented 0.5%MnO2-(K0.5Na0.5)NbO3 (Mn-KNN) crystals was studied as a function of domain size, being poled with different electric fields at 205 C (above orthorhombic to tetragonal phase transition temperature To-t). The piezoelectric coefficients d33 and relative dielectric constants er were found to increase from 270 pC/N to 350 pC/N and 730 to 850 with the domain size decreasing from 9 to 2 lm, respectively. The thermal stability of piezoelectric property was investigated, where the d33 value for [001]-oriented Mn-KNN crystals with domain size of 2 lm was found to decrease to 330 pC/N at depoling temperature of 150 C, with minimal variation of 6%. The results reveal that domain size engineering is an effective way to improve the piezoelectric properties of Mn-KNN crystals. Publication DetailsLin, D., Zhang, S., Cai, C. & Liu, W. (2015). Domain size engineering in 0.5%MnO2-(K0.5Na0.5)NbO3 lead free piezoelectric crystals. Journal Of Applied Physics, 117 (7) The piezoelectric property of [001]-oriented 0.5%MnO 2 -(K 0.5 Na 0.5 )NbO 3 (Mn-KNN) crystals was studied as a function of domain size, being poled with different electric fields at 205 C (above orthorhombic to tetragonal phase transition temperature T o-t ). The piezoelectric coefficients d 33 and relative dielectric constants e r were found to increase from 270 pC/N to 350 pC/N and 730 to 850 with the domain size decreasing from 9 to 2 lm, respectively. The thermal stability of piezoelectric property was investigated, where the d 33 value for [001]-oriented Mn-KNN crystals with domain size of 2 lm was found to decrease to 330 pC/N at depoling temperature of 150 C, with minimal variation of $6%. The results reveal that domain size engineering is an effective way to improve the piezoelectric properties of Mn-KNN crystals. V C 2015 AIP Publishing LLC.

show abstract

Section: Introductionmentioning

confidence: 99%

Domain size engineering in 0.5%MnO2-(K0.5Na0.5)NbO3 lead free piezoelectric crystals

Lin

Zhang

Cai

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…There are two peaks are observed at 195 °C and 420 °C for KNN-LN single crystals, and 130 °C and 280 °C for KNN-LT single crystals corresponding to the orthorhombic-tetragonal phase transition temperature (T O-T ) and the tetragonal-cubic phase transition temperature T C , respectively. For the two phase transition temperature, the KNN-LN single crystals is approximately consistent with KNN-0.05LN single crystals [1] and the T C of KNN-LT single crystals decreases to 280 °C, compared with KNN, due to the addition of Ta content. However, the Curie point over 310 °C of (K 0.485 Na 0.485 Li 0.3 )(Nb 0.8 Ta 0.2 )O 3 ceramics is due to the addition of Li [2].…”

Section: Dielectric Propertiesmentioning

confidence: 73%

“…Lead-based ferroelectric and piezoelectric materials, such as PbTiO 3 -PbZrO 3 (PZT), are most widely used in acoustic transducers, solid actuators, and other electromechanical fields because of their high piezoelectric and electromechanical properties [1]. However, despite the toxic nature of PbO (which comprises 60-70 wt% of ceramic) it is most commonly used in PZT-based materials, therefore an urgent demand is to find lead-free materials to replace Pb-based ceramics in future.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Lead-Free (K0.5Na0.5)NbO3-LiNbO3 and (K0.5Na0.5)NbO3-LiTaO3 Ferroelectric Single Crystals

Chu

Tailor

et al. 2014

Crystals

View full text Add to dashboard Cite

Lead-free (K 0.5 Na 0.5 )NbO 3 -LiNbO 3 (KNN-LN) and (K 0.5 Na 0.5 )NbO 3 -LiTaO 3 (KNN-LT) ferroelectric single crystals, with the dimensions of 11  11  5 mm 3 and 5  5  3 mm 3 , were grown successfully using the top-seeded solution growth (TSSG) method, respectively. The crystal structures were analyzed by means of X-ray diffraction, showing orthorhombic symmetry for KNN-LN single crystals and coexistence of orthorhombic and tetragonal symmetry for KNN-LT single crystals at room temperature. The orthorhombic-tetragonal (T O-T ) and tetragonal-cubic (T C ) phase transition temperatures are 195 °C and 420 °C for the KNN-LN single crystals, and 130 °C and 280 °C for KNN-LT single crystals, respectively. The remnant polarization (P r ) is 27.8 μC/cm 2 with a coercive field (E c ) of 17 kV/cm for KNN-LT single crystals. The two single crystals showed 90° domains with layers in (parallel) straight lines, while KNN-LT single crystals have a larger domain region. The actual stoichiometry deviates easily from the original composition in the process of crystal growth, thus, an appropriate nominal composition and optimized crystal growth method is desired to get high-quality crystals in the future.

show abstract

“…In this respect, recent advancements on synthesis of good quality Pb-free piezoelectric single crystals of complex compositions with high functional properties is an exciting development. Notable mentions in this category include crystals of Li-doped potassium sodium niobate using the Bridgman method [24], (1−x)BaTiO 3−x CaTiO 3 using floating zone technique [25], (Ba (1−x) ,Ca x )(Ti (1−y) Zr y )O 3 by Chochralski method [26], (Ba (1−x) ,Ca x )(Ti (1−y) Zr y )O 3 by the flux-method [27], (Na 0.5 Bi 0.5 )TiO 3 -BaTiO 3 and (K,Na)(Nb,Ta)O 3 using the top-seeded solution growth (TSSG) method [23,[28][29][30], and (Na 0.5 Bi 0.5 )TiO 3 -BaTiO 3 -and (K,Na)(Nb)O 3 -based crystals using the seed-free solid state crystal growth technique [31][32][33]. The developments with regard to solid state crystal growth are particularly noteworthy, since they provide a cheaper alternative to growing crystals from melt.…”

Section: Characterization Of Multiscale Structural Mechanisms Using Dmentioning

confidence: 99%

Characterization of Pb-Free KNbO3- and (Na,Bi)TiO3-Based Piezoelectric Single-Crystals Using X-ray and Neutron Diffraction

Pramanick

2018

Crystals

View full text Add to dashboard Cite

Abstract:In view of serious environmental concerns with traditional Pb-based piezoelectrics, the search for new Pb-free alternatives has intensified recently. A thorough investigation of structure-property relationships in Pb-free piezoelectrics is desired in order to design new material compositions with high electromechanical properties that can be operated over a broader range of conditions. Recent availability of high-quality single crystals has not only opened the possibility for achieving multifold enhancements in the electromechanical properties in this new class of materials, but has also provided opportunities to undertake fundamental studies on their structure-property relationships. In the following pages, I review some of the recent X-ray and neutron diffraction studies of Pb-free piezoelectric single crystals, which have provided novel insights into their multiscale stimuli-induced structural mechanisms, including phase transitions, nanoscale structural ordering, lattice instability, and domain re-orientation. Opportunities and challenges for future progress in this area of study are discussed.

show abstract

Dielectric and piezoelectric properties of lead-free 0.95(K0.5Na0.5)NbO3–0.05LiNbO3 crystals grown by the Bridgman method

Cited by 98 publications

References 14 publications

Domain size engineering in 0.5%MnO2-(K0.5Na0.5)NbO3 lead free piezoelectric crystals

Domain size engineering in 0.5%MnO2-(K0.5Na0.5)NbO3 lead free piezoelectric crystals

Preparation and Characterization of Lead-Free (K0.5Na0.5)NbO3-LiNbO3 and (K0.5Na0.5)NbO3-LiTaO3 Ferroelectric Single Crystals

Characterization of Pb-Free KNbO3- and (Na,Bi)TiO3-Based Piezoelectric Single-Crystals Using X-ray and Neutron Diffraction

Contact Info

Product

Resources

About