Hydrothermal synthesis of (Zr,Sn)TiO4 nano-powders for microwave ceramics

Xiong, Zhe; Huang, Jinliang; Chen, Fang; Pan, Zhengwei

doi:10.1016/s0955-2219(03)00161-4

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…The production by the traditional method of obtaining ceramics creates coarse particles and disordered structures, which took to the development of new methods of powders obtaining with the structure of submicron size and better characteristics [3]. The most used methods are: hydrothermal synthesis [4], freeze drying [5], Pechini [6], Sol gel [7], thermal decomposition [8], combustion reaction [9], etc. Among these, the combustion technique can produce ultrafine powders of ceramic oxide in a surprisingly short time at a temperature lower than the powders calcination and with improved characteristics.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Structural and Morphological Characteristics of the System Ni1-xZnxFe2O4 Obtained by Combustion Reaction

Braga

Filho

Neiva

et al. 2014

MSF

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The synthesis by combustion reaction stands as an alternative technique for preparing powders with high purity level, nanometric particle size and low cost. Therefore, this study had as objective the synthesis and characterization of ferrite powders with nominal composition NI1-xZnxFe2O4(x = 0.6, 0.7 and 0.8 mol) prepared by combustion reaction using urea as fuel. The influence of the quantity of zinc in the final characteristics of the powders was also investigated. The powders were characterized by X-ray diffraction (XRD), nitrogen adsorption (BET) and scanning electron microscopy (SEM). All compositions resulted in nanometric powders of Ni-Zn ferrites with direct formation of the inverse spinel phase, showing the effectiveness of the synthesis method applied. The increase of zinc's concentration caused an increase in surface area, ranging 4 m2g-1from 23 m2g-1. And the SEM micrographs show that the powders have thinner particle morphology with increasing zinc content.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Structural and Morphological Characteristics of the System Ni1-xZnxFe2O4 Obtained by Combustion Reaction

Braga

Filho

Neiva

et al. 2014

MSF

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“…[21][22][23] (Zr 0.8 , Sn 0.2 )TiO 4 (ZST) is generated by replacement of 20 mol% Zr by Sn in ZrTiO 4 and it exhibits the a-PbO orthorhombic structure. 24,25 In order to develop microwave ceramics with high quality for wireless communication technology, Xiong et al 26 prepared ZST nanopowder by a hydrothermal synthesis route and the dielectric properties were e r 5 30-45 and Q Â f 5 10 Â 10 3 -25 Â 10 3 . Because it is difficult to fully densify ZST ceramics, Huang and Weng 24 and Houivet et al 25 studied CuO, ZnO, La 2 O 3 , and NiO dopants as sintering aids for ZST.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Millimeter‐Wave Electromagnetic Bandgap Crystals Using Microwave Dielectric Powders

Lee

Yang

et al. 2009

Journal of the American Ceramic Society

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Electromagnetic bandgap (EBG) structures active in the 90–110 GHz region widely used by security imaging radar were created using different ceramics by a rapid prototyping method informed by finite difference time domain modeling. This solid free-forming method uses a high volatility solvent-based ceramic paste extruded through fine nozzles allowing ceramic powders to be assembled on a multiaxis building platform avoiding machining, etching, or the alignment of loose rods and created to designs downloaded directly from a computer file. Lattices were made from two high dielectric constant ceramics: La(Mg0.5, Ti0.5)O3 and (Zr0.8, Sn0.2)TiO4 and compared with those of Al2O3 demonstrating three EBG structures with different dimensions and dielectric constants but with the same bandgap. The effects of manufacturing tolerances on bandgap frequency are investigated by simulation

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“…6,7 Also the microwave dielectric properties of ZST ceramics are dependent upon the raw materials, additives and the microstructure. 8,9 It is difficult to fully densify ZST ceramics without a sintering aid and with 1 wt-% addition of ZnO, sintered at 1400uC the ZST ceramics is reported to have an e r 537 . 8 and Qxf o 545 000 (Ref.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size and ZnO addition on microwave dielectric properties of nanocrystalline (Zr_0.8Sn_0.2) TiO₄ceramics

Pamu

Rao

Raju³

2007

Advances in Applied Ceramics

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Polycrystalline samples of (Zr 0 . 8 Sn 0 . 2 )TiO 4 have been synthesised by solid state reaction method. The effects of ball milling and the addition of ZnO (1-2 . 5 wt-%) on the microwave dielectric properties of (Zr 0 . 8 Sn 0 . 2 )TiO 4 ceramics are investigated. As the ball milling time increases, the density of the (Zr 0 . 8 Sn 0 . 2 )TiO 4 ceramics increases. The influence of ZnO as a sintering aid on the sintering temperature of (Zr 0 . 8 Sn 0 . 2 )TiO 4 is also studied. As the weight percentage of ZnO increases, the density increases up to 1 . 5 wt-% of ZnO and thereafter it starts decreasing. The dielectric constant e r and the product of quality factor Q and resonant frequency f o of TE 01d mode (Qxf o ) followed the same trend with increasing density, irrespective of whether the density increased with ball milling time or by addition of ZnO. The value of Qxf o is found to increase with increasing grain size. The microwave dielectric constant and the Qxf o values were respectively ranged from 32 to 39 . 3 and from 32 000 to 49 600 at 10 . 5 GHz for (Zr 0 . 8 Sn 0 . 2 )TiO 4 ceramics. Furthermore, the influence of the processing parameters on the microwave dielectric properties of (Zr 0 . 8 Sn 0 . 2 )TiO 4 is discussed.

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Hydrothermal synthesis of (Zr,Sn)TiO4 nano-powders for microwave ceramics

Cited by 11 publications

References 9 publications

Evaluation of Structural and Morphological Characteristics of the System Ni<sub>1-x</sub>Zn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> Obtained by Combustion Reaction

Evaluation of Structural and Morphological Characteristics of the System Ni<sub>1-x</sub>Zn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> Obtained by Combustion Reaction

Fabrication of Millimeter‐Wave Electromagnetic Bandgap Crystals Using Microwave Dielectric Powders

Effect of particle size and ZnO addition on microwave dielectric properties of nanocrystalline (Zr_0.8Sn_0.2) TiO₄ceramics

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Hydrothermal synthesis of (Zr,Sn)TiO4 nano-powders for microwave ceramics

Cited by 11 publications

References 9 publications

Evaluation of Structural and Morphological Characteristics of the System Ni<sub>1-x</sub>Zn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> Obtained by Combustion Reaction

Evaluation of Structural and Morphological Characteristics of the System Ni<sub>1-x</sub>Zn<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> Obtained by Combustion Reaction

Fabrication of Millimeter‐Wave Electromagnetic Bandgap Crystals Using Microwave Dielectric Powders

Effect of particle size and ZnO addition on microwave dielectric properties of nanocrystalline (Zr0.8Sn0.2) TiO4ceramics

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Effect of particle size and ZnO addition on microwave dielectric properties of nanocrystalline (Zr_0.8Sn_0.2) TiO₄ceramics