Low-temperature single-step reactive sintering methods for lead magnesium niobate

Fang, Xiaohua; Li, Bingquan; Gu, Huiming

doi:10.1016/j.matlet.2005.05.054

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…As it can be seen, the maximum value of 81,000 for dielectric constant at Curie temperature (0°C) has been obtained. This value is much higher than the values reported earlier by other authors in the literature who synthesized pyrochlore free PMN ceramic via other methods [15,19,20]. Also, the curve in Fig.…”

Section: Resultscontrasting

confidence: 53%

Synthesis of PMN pyrochlore free ceramics via a modified mixed oxide method

Moetakef

Nemati

2007

J Electroceram

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A modified mixed oxide method which is based on a two step reaction sintering process was designed to obtain single phase PMN ceramics. In this regard, pyrochlore phase formation during calcination process at different calcination temperatures was studied to determine the best soaking temperature for the first step in the specified method. In other words, the calcination temperature in which the least pyrochlore phase produced was chosen as the first step soaking temperature. The results showed that by utilizing this new method, single phase PMN ceramics with a high relative density of 98% can be synthesized successfully using conventional mixed oxide starting materials.

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Section: Resultscontrasting

confidence: 53%

Synthesis of PMN pyrochlore free ceramics via a modified mixed oxide method

Moetakef

Nemati

2007

J Electroceram

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“…It has been reported that reactive sintering can lower the sintering temperature of some perovskite oxides. 19),20) BSCF must be synthesized at temperatures below 700°C and sintered on the electrolyte layer. We used barium peroxide (BaO 2 ) and strontium peroxide (SrO 2 ) as starting materials of A-site elements in perovskite.…”

Section: Introductionmentioning

confidence: 99%

Reactive-sintering of Ba0.5Sr0.5Co0.8Fe0.2O3−δ using alkaline earth peroxides for low-temperature synthesis

Yamaguchi

Sumi

Shimada

et al. 2017

J. Ceram. Soc. Japan

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In this study, we developed the low-temperature synthesis of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3¹¤ (BSCF) using barium peroxide (BaO 2 ) and strontium peroxide (SrO 2 ) as starting materials of A-site elements in perovskite. The sintered bodies were obtained at a low temperature of 700°C by two approaches. One was a two-step sintering process, which included the preparation of fine hexagonal-phase BSCF powders with mean crystallite sizes of 2030 nm by a novel low-temperature solid-state reaction before sintering. Another approach was a one-step sintering process using reactive sintering, which is the simultaneous reaction of BSCF synthesis and green body sintering from the starting material powders. For the sintered bodies obtained by the one-and two-step sintering processes, the relative density was ca. 50%. The reactive-sintered body of hexagonal-phase BSCF obtained by the onestep process showed higher electrical conductivity of 6.3 S cm ¹1 at 500°C than the BSCF sintered bodies obtained by the two-step process (4.1 S cm ¹1). Reactive sintering realizes good connectivity among BSCF particles, which enhances the electrical conductivity of porous BSCF bodies.

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“…Because of the lower calcination temperature and higher permittivity peak, they were considered suitable to build inexpensive multi-layer capacitors with high capacity [1,2]. Usually, electroceramics are made by traditional solid state reaction or mixed oxides method (MO) [3][4][5]. A major problem with synthesis of PMN-PZT relaxor ceramics is pyrochlore phase.…”

Section: Introductionmentioning

confidence: 99%

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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Low-temperature single-step reactive sintering methods for lead magnesium niobate

Cited by 6 publications

References 19 publications

Synthesis of PMN pyrochlore free ceramics via a modified mixed oxide method

Synthesis of PMN pyrochlore free ceramics via a modified mixed oxide method

Reactive-sintering of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3−δ</sub> using alkaline earth peroxides for low-temperature synthesis

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

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Low-temperature single-step reactive sintering methods for lead magnesium niobate

Cited by 6 publications

References 19 publications

Synthesis of PMN pyrochlore free ceramics via a modified mixed oxide method

Synthesis of PMN pyrochlore free ceramics via a modified mixed oxide method

Reactive-sintering of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3&minus;&delta;</sub> using alkaline earth peroxides for low-temperature synthesis

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

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Reactive-sintering of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3−δ</sub> using alkaline earth peroxides for low-temperature synthesis