Synthesis and structure of PMN–PT ceramic nanopowder free from pyrochlore phase

Ghasemifard, Mahdi; Hosseini, Seyyed Mohammad; Khorrami, Gh.H.

doi:10.1016/j.ceramint.2009.03.036

Cited by 59 publications

(25 citation statements)

References 23 publications

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“…We used this method to obtain longitudinal optical (LO) mode and transverse optical (TO) for the PMN-PZT nano-powder. The transverse and Table 6 and it is obvious that results are in a good agreement with Green Lor [34], Francis [36] and Ghasemifard [37]. The dielectric function in the frequencies between TO and LO is negative and the wave won't propagate in the matter therefore, we expect that the reflection coefficient to be large in this area.…”

Section: Resultssupporting

confidence: 70%

The effect of temperature dependences on optical properties of PMN-PZT nano-powders

Ghasemifard

Zavar

Ghasemifard

et al. 2010

J Opt

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PMN-PZT nano-powders were prepared by citrate-nitrate gel-combustion technique and optical parameters were obtained by Kramers-Kronig transformation. Organic metals and metal salts precursor were employed in this process. X-ray diffraction shows that increasing the temperature from 500°C to 800°C reduces the pyrochlore unwanted phase in nano-powders so that in 900°C the single phase of perovskite formed. According to the TEM images, the particles size are in the range of 20-30 nm. FTIR spectrum transmittance confirms the perovskite phase of nano-powders. Using FTIR spectra and Kramers-Kroning relationship, the optical constants including the refractive index, extinction coefficients, real and imaginary parts of dielectric function investigated. In addition, we determined plasma frequencies from energy loss functions at 600°C, 700°C, 800°C and 900°C. The increasing calcination temperature makes the significant changes in optical constants.

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Section: Resultssupporting

confidence: 70%

The effect of temperature dependences on optical properties of PMN-PZT nano-powders

Ghasemifard

Zavar

Ghasemifard

et al. 2010

J Opt

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“…where R(v) is the reflectance and w(v) is the phase change between the incidence and the reflected signal at a particular wave number v. w(v) is obtained from Fourier transform of K-K dispersion relation [28].…”

Section: Theory Of K-k Methodsmentioning

confidence: 99%

Effect of solvent on structure and optical properties of PZT nanoparticles prepared by sol–gel method, in infrared region

Zak

Majid

2011

Ceramics International

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“…Although the columbite method is the most widely used for the synthesis of PMN‐based materials, other approaches have also been developed, usually with the aim of avoiding the additional calcination step. Methods such as molten‐salts synthesis, auto‐combustion synthesis, sol–gel synthesis, and the polymerizable complex method are usually expensive and difficult to scale up. The mechanochemical synthesis of the pyrochlore‐free PMN–PT was also demonstrated .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 0.65Pb(Mg_1/3Nb_2/3)O₃–0.35PbTiO₃ by Controlled Agglomeration of Precursor Particles

et al. 2012

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0.65Pb(Mg1/3Nb2/3)O3–0.35PbTiO3 powder was prepared by a single‐step, solid‐state synthesis at 850°C. This was enabled by the controlled agglomeration of precursor particles by the change of pH in water suspensions. With the design of the contacts between the particles in the agglomerates, a phase‐pure perovskite powder was synthesized from a suspension with a pH = 12.5. At the inherent pH = 11.4, the agglomerates that promote the pyrochlore formation were formed, resulting in a mixture of perovskite and pyrochlore phases after the calcination. The ceramics prepared from the suspension with pH = 12.5 were sintered to 96% of theoretical density at only 950°C, and exhibited electrical properties comparable to ceramics prepared by the columbite method, sintered at much higher temperatures. In contrast, the properties of the ceramics from the pH = 11.4 suspension were heavily deteriorated due to the presence of the pyrochlore phase and the high degree of porosity.

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Synthesis and structure of PMN–PT ceramic nanopowder free from pyrochlore phase

Cited by 59 publications

References 23 publications

The effect of temperature dependences on optical properties of PMN-PZT nano-powders

The effect of temperature dependences on optical properties of PMN-PZT nano-powders

Effect of solvent on structure and optical properties of PZT nanoparticles prepared by sol–gel method, in infrared region

Synthesis of 0.65Pb(Mg_1/3Nb_2/3)O₃–0.35PbTiO₃ by Controlled Agglomeration of Precursor Particles

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Synthesis and structure of PMN–PT ceramic nanopowder free from pyrochlore phase

Cited by 59 publications

References 23 publications

The effect of temperature dependences on optical properties of PMN-PZT nano-powders

The effect of temperature dependences on optical properties of PMN-PZT nano-powders

Effect of solvent on structure and optical properties of PZT nanoparticles prepared by sol–gel method, in infrared region

Synthesis of 0.65Pb(Mg1/3Nb2/3)O3–0.35PbTiO3 by Controlled Agglomeration of Precursor Particles

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Synthesis of 0.65Pb(Mg_1/3Nb_2/3)O₃–0.35PbTiO₃ by Controlled Agglomeration of Precursor Particles