PFM characterization of (K0.5Na0.5)0.95La0.05(Nb0.9Ti0.05)O2.9 ceramics lead free

Durruthy-Rodríguez, M. D.; Gervacio-Arciniega, J. J.; Fuentes, J.; Perez, Arnaud J.; Yáñez-Limón, J.M.; Espinoza‐Beltrán, F.J.; Raymond, O.; Siqueiros, J. M.

doi:10.1007/s00339-013-7562-1

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…When the temperature is higher than the molten temperature of the salt, the salt becomes liquid-phase. The fluid molten salt runs through and around the powder grains, preventing the conglutinations of grains, so the powder prepared by molten salt method cannot agglomerate or can agglomerate weakly [10][11][12][13]. In contrast, the grains of CNBNO powder prepared by molten salt method are flake-like, with almost no agglomeration.…”

Section: Influences Of Different Salt Contents On the Micromorphologymentioning

confidence: 99%

Effects of molten salt content and reaction temperature on molten salt preparation of CaNaBi2Nb3O12 powder

Tian

Gao

et al. 2015

J Mater Sci: Mater Electron

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Pure bismuth layer-structured ferroelectric CaNaBi 2 Nb 3 O 12 ceramic powders with anisotropy were prepared by the molten salt method in molten salt fluxes of NaCIKCl at 750-900°C. The effects of salt content and calcination temperature on the microstructure and morphology of CaNaBi 2 Nb 3 O 12 powder were investigated. The phase and the microstructure of reaction products were detected by X-ray diffraction and scanning electron microscopy. The results show that the particle size of CaNaBi 2 Nb 3 O 12 powders and the level of anisotropy increase with increasing reaction temperature. The sample dispersion gets better with the increase of molten salt content. The CaNaBi 2 Nb 3 O 12 powders with good micromorphologies were obtained when the mass ratio of salt to raw materials is 1:1.05, calcined at 800°C for 1 h. The grain is regularly flake-like, with uniform particle size and single good dispersion.

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Section: Influences Of Different Salt Contents On the Micromorphologymentioning

confidence: 99%

Effects of molten salt content and reaction temperature on molten salt preparation of CaNaBi2Nb3O12 powder

Tian

Gao

et al. 2015

J Mater Sci: Mater Electron

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“…Previous works showed that the La and Ti modified KNaNbO 3 ceramic is a ferroelectric with a paraelectric-ferroelectric phase transition around 100 ℃ and a high permittivity value at room temperature [7,8]. The present work studies the La 3+ and Ti 4+ effects on the optical properties of K 0.5 Na 0.5 NbO 3 .…”

Section: Introductionmentioning

confidence: 82%

Strong emissions of blue–yellow–red regions of La and Ti modified KNaNbO3 ferroelectric ceramics

et al. 2015

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Abstract:In this work, the results of the study on the optical properties of the perovskite structure ABO 3 with La 3+ substitution for ions K + and Na + in the A site and Ti 4+ substitution for ion Nb 5+ in the B site are presented. The ceramics were sintered at 1100 ℃ and 1190 ℃ and formed at 10 MPa and 80 MPa. Dense ceramics were obtained with 94% of the theoretical density. The piezoresponse force microscopy (PFM) showed needle-shaped grains with a size of 30 nm for the samples formed at 10 MPa at both sintering temperatures. Apparently, the high temperature and high pressure used in formation reduced the energy of the band gap (E g ) from 3.36 to 3.09 eV. Strong emissions to 2.19, 1.86, 2.5, and 2.31 eV were obtained by exciting the samples at 325, 373, 457, and 500 nm, respectively; these emissions corresponded to blue-yellow-red regions of the visible spectrum.

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“…In the second examples in this topic, we present the influence of conformation pressure and sintering temperature in ceramics of niobate of sodium-potassium (KNN) [42,43]. The increase of the conformation pressure from 10 MPa to 80 MPa causes a great effect in the transition temperature (Figure 18a), decreasing it near room temperature; additionally there is an increase of the grain size ( Figure 18c) and smaller polarization state (Figure 18b).…”

Section: Differences Caused By Variations In the Ceramic Processmentioning

confidence: 99%

From the Mining to the Obtaining of Ferroelectric Ceramics

Mdd¹

2017

J Powder Metall Min

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PFM characterization of (K0.5Na0.5)0.95La0.05(Nb0.9Ti0.05)O2.9 ceramics lead free

Cited by 5 publications

References 6 publications

Effects of molten salt content and reaction temperature on molten salt preparation of CaNaBi2Nb3O12 powder

Effects of molten salt content and reaction temperature on molten salt preparation of CaNaBi2Nb3O12 powder

Strong emissions of blue–yellow–red regions of La and Ti modified KNaNbO3 ferroelectric ceramics

From the Mining to the Obtaining of Ferroelectric Ceramics

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