The influence of pH dependent ion leaching on the processing of lead-zirconate-titanate ceramics

Bakaric, Tina; Budič, Bojan; Malič, Barbara; Kuščer, Danjela

doi:10.1016/j.jeurceramsoc.2015.02.021

Cited by 17 publications

(16 citation statements)

References 23 publications

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“…Figure highlights that Pb is the most leachable species of PIC 151 and other cations of this material remain below the detection limit of our device. Similar results were obtained for other PZT‐based materials . Pb leaching rates depend on the chemical composition of the material, sintering conditions, as well as the composition and pH value of the aqueous media .…”

Section: Discussionsupporting

confidence: 82%

“…Similar results were obtained for other PZT‐based materials . Pb leaching rates depend on the chemical composition of the material, sintering conditions, as well as the composition and pH value of the aqueous media . This is a major concern for technological applications in contact with aqueous media or under atmosphere conditions such as ferroelectric ceramics implemented as biomaterials, sensors or actuators.…”

Section: Discussionsupporting

confidence: 73%

“…Therefore, wettability seems to be a major factor determining the cell activity and proliferation. However, the effect of the surface chemistry must also be taken into account, especially considering that ions leach from the perovskite ferroelectric ceramics into aqueous environments as shown in Figure and in the literature …”

Section: Discussionmentioning

confidence: 99%

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Cytotoxicity, chemical stability, and surface properties of ferroelectric ceramics for biomaterials

et al. 2017

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Surface chemistry and topo-physical properties determine the interactions of biomaterials with their physiological environment. Ferroelectrics hold great promise as the next generation of scaffolds for tissue repair since they feature tunable surface electrical charges, piezoelectricity, and sensing capabilities. We investigate the topography, wettability, chemical stability, and cytotoxicity in salient ferroelectric systems such as (1Àx) (Na 1/2 Bi 1/2 )TiO 3 -xBaTiO 3 , (1Àx) showed the greatest potential leading to a cell viability of (149 AE 30)% and DNA synthesis of (299 AE 85)% in comparison to the reference. Lead leaching from Pb (Zr,Ti)O 3 negatively affected the cultured cells. Wettability and chemical stability are key factors that determine the cytotoxicity of ferroelectrics. These variables have to be considered in the design of novel electroactive scaffolds based on ferroelectric ceramics.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionsupporting

confidence: 73%

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Cytotoxicity, chemical stability, and surface properties of ferroelectric ceramics for biomaterials

et al. 2017

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“…Environment care and cost issues should also be concerned in mass production grade. 30 The study of Deliormanli et al 31 on lead magnesium niobate (PMN) stability in aqueous medium reported that the release of Mg 2+ and Pb 2+ cations increased as a function of increasing acidity while the dissolution of Nb 5+ was under negligible values. [20][21][22][23][24][25][26][27] Understanding the surface chemistry of ceramic powders is a critical step for utilization of aqueous processing.…”

Section: Introductionmentioning

confidence: 99%

Chemical stability of KNbO₃, NaNbO₃, and K_0.5Na_0.5NbO₃ in aqueous medium

2017

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In recent years, potassium sodium niobate (K0.5Na0.5NbO3, KNN) has become popular and promising among perovskite lead‐free piezoceramic systems. In this study, the chemical stability of KNN powders in aqueous medium was investigated as a function of pH, time, and powder surface area. To better understand the dissolution behavior of the complex KNN stoichiometry, subconstituents such as potassium niobate (KNbO3, KN) and sodium niobate (NaNbO3, NN) were investigated separately first. Results showed that all of the cations in the structure underwent dissolution in different values. Indicating that KNN undergoes incongruent dissolution in aqueous medium, the dissolution of A site cations was higher at lower pH while the dissolution of B site cations increased at higher initial pH. The order of released cation concentrations (CA1 = K > CA2 = Na > CB = Nb) fits with inverse relationship of cation field strength (FS) order, B = Nb5+FS > A2 = Na+FS>A1 = K+FS, at pH 4, 7 and 10 for NN, KN, and KNN. Calculated diffuse layer thickness from the ICP data confirmed to outer amorphous layer in TEM image. Also, the ratio of normalized cation concentration versus surface area of powders showed that incongruent dissolution kinetic was driven by the diffusion step.

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“…They found that the optical properties of the PZT nanoparticles controlled by suitable dopants. Influence of pH‐dependent ion leaching on the processing of PZT ceramics was studied by Bakaric et al . The effects of dispersant concentration and pH on properties of PZT aqueous suspension were studied by Suntako et al …”

Section: Introductionmentioning

confidence: 99%

Effect of particle size on the optical properties of lead zirconate titanate nanopowders

Pakizeh

Moradi

2018

J Am Ceram Soc

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Nanopowder samples of lead zirconate titanate (Pb1.1Zr0.52Ti0.48O3 or PZT) were prepared by the sol‐gel method with controlled pH values. The samples were characterized using FTIR spectroscopy, XRD, FE‐SEM, and TEM techniques. Most of the peaks in the XRD pattern were related to the coexistence of tetragonal‐rhombohedral phases and confirmed the formation of PZT with a perovskite structure. Also, the crystallite size of PZT nanopowders was in a range of 17‐28 nm. FTIR spectroscopy revealed a longitudinal optical (LO) and transverse optical (TO) phonon modes corresponding to the stretching vibration of Ti‐O and Zr‐O bonds. The influence of pH values on the LO and TO phonon modes, LO‐TO splitting, refractive index n(ω), extinction coefficient k(ω), and the real ɛ1(ω) and imaginary ɛ2(ω) parts of dielectric function was discussed. These properties were investigated in the mid‐infrared region (450‐750 cm−1). The energy loss function Im[−1/(ɛ)] of PZT nanopowders was obtained by Kramers‐Kronig dispersion relations. The TO phonon frequency decreases with increasing crystallite size of the PZT samples. This effect does not happen at pH 8 to pH 9. As the crystallite size increased from 17.26 nm (at pH 5) to 27.25 nm (at pH 7), the LO‐TO splitting increased as well. This result showed that the optimum pH for absorption of IR radiation and optical application was at pH 7.

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The influence of pH dependent ion leaching on the processing of lead-zirconate-titanate ceramics

Cited by 17 publications

References 23 publications

Cytotoxicity, chemical stability, and surface properties of ferroelectric ceramics for biomaterials

Cytotoxicity, chemical stability, and surface properties of ferroelectric ceramics for biomaterials

Chemical stability of KNbO₃, NaNbO₃, and K_0.5Na_0.5NbO₃ in aqueous medium

Effect of particle size on the optical properties of lead zirconate titanate nanopowders

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The influence of pH dependent ion leaching on the processing of lead-zirconate-titanate ceramics

Cited by 17 publications

References 23 publications

Cytotoxicity, chemical stability, and surface properties of ferroelectric ceramics for biomaterials

Cytotoxicity, chemical stability, and surface properties of ferroelectric ceramics for biomaterials

Chemical stability of KNbO3, NaNbO3, and K0.5Na0.5NbO3 in aqueous medium

Effect of particle size on the optical properties of lead zirconate titanate nanopowders

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Chemical stability of KNbO₃, NaNbO₃, and K_0.5Na_0.5NbO₃ in aqueous medium