Microwave dielectric properties of (1−x)(Ca0.88Sr0.12)TiO3–x(Bi0.5Na0.5)TiO3 high dielectric constant ceramics

Deng, Qingqing; Huang, Chun-e; He, Wei; Li, Zhao; Shen, Chunying

doi:10.1007/s10854-017-8346-8

Cited by 4 publications

(3 citation statements)

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“…The M1 sites are larger and more distorted than M2 sites, and as Ti 4+ gradually occupies the M1 sites, the increased distortion of the M1 sites is the main cause of the increased inversion 60,61 . Furthermore, two adjacent cations were strongly deformed at high temperature, and these deformations induce the formation of solid solutions of compound with similar structures 62,63 …”

Section: Resultsmentioning

confidence: 99%

“…60,61 Furthermore, two adjacent cations were strongly deformed at high temperature, and these deformations induce the formation of solid solutions of compound with similar structures. 62,63 TA B L E 1 Compositions of the equilibrium phases at 1600 Accordingly, the exact composition of the brookite and spinel solid solutions with the general chemical formula of (Mg 2+ [Ti…”

Section: Formation Principles Of Pseudobrookite and Spinel Solid Solu...mentioning

confidence: 99%

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Phase equilibria of MgO–Al₂O₃–TiO₂ system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Qiu

Shi

Yu³

et al. 2022

J Am Ceram Soc.

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The recycling of titanium from titania‐bearing slag is an important part of the circular economy; however, the yield of titania is restricted due to the lack of fundamental thermodynamic data. In the present work, the equilibrium phase relations of MgO–Al2O3–TiO2 system in air at 1600°C have been determined using a high‐temperature equilibration‐quenching technique followed by X‐ray photoelectron spectroscopy, scanning electron microscopy‐energy‐dispersive X‐ray spectrometry, and X‐ray diffraction. Ti4+ was confirmed as the stable valence of titanium, and the rutile and spinel solid solution phases were detected to be coexisting with pseudobrookite solid solution phase, respectively. The formation principles of pseudobrookite and spinel solid solutions were confirmed in view of the corresponding crystal structure and the composition substitution relationship of the oxides at 1600°C. However, great discrepancies were found from the comparison of the present experimental results with the thermodynamic calculations and the literature results, and the present equilibrium phase relations are therefore significant for updating the present titania related thermodynamic database for a superior prediction of the thermodynamic behaviors of relevant process.

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Section: Resultsmentioning

confidence: 99%

Section: Formation Principles Of Pseudobrookite and Spinel Solid Solu...mentioning

confidence: 99%

Phase equilibria of MgO–Al₂O₃–TiO₂ system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Qiu

Shi

Yu³

et al. 2022

J Am Ceram Soc.

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“…In our previous work, (1–x)(Ca 0.88 Sr 0.12 )TiO 3 -x(Bi 0.5 Na 0.5 )TiO 3 ceramics were prepared by the standard solid-state sintering method. The 0.95CST–0.05BNT ceramics, having excellent performance ( ε r = 185.5, Q × f = 8116 GHz, τ f = + 639 × 10 −6 /°C), had been obtained [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Microwave Sintering on the Properties of 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 Ceramics

Nan

et al. 2019

Materials

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Perovskite ceramics are a common microwave dielectric material, but the development and application of this material has been limited by the high, positive resonance frequency temperature coefficient and sintering temperature. Therefore, adjusting the temperature coefficient of the resonance frequency and reducing the sintering temperature have become important research directions. In this work, 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 ceramics (referred to as 0.95CST-0.05BNT) were prepared by standard solid-state reaction and microwave sintering. Microwave sintering greatly shortened the sintering period and holding time. Moreover, the 0.95CST–0.05BNT ceramics showed more uniform grain size distribution, and microwave sintering reduced energy consumption in the experiment. Therefore, the temperature coefficient of the resonance frequency of MWS ceramics was reduced by 119 × 10−6 /℃. All of the ceramics, which were sintered at 1300 °C for 40 minutes, showed optimal microwave dielectric properties: εr = 187.6, Q × f = 8958 GHz, and τf = +520 × 10−6 /°C.

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Enhanced dielectric properties of polyimide composites by doping metal amidoxime polycarylonitrile

Long

2022

J Mater Sci: Mater Electron

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Microwave dielectric properties of (1−x)(Ca0.88Sr0.12)TiO3–x(Bi0.5Na0.5)TiO3 high dielectric constant ceramics

Cited by 4 publications

References 19 publications

Phase equilibria of MgO–Al₂O₃–TiO₂ system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Phase equilibria of MgO–Al₂O₃–TiO₂ system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Effect of Microwave Sintering on the Properties of 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 Ceramics

Enhanced dielectric properties of polyimide composites by doping metal amidoxime polycarylonitrile

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Microwave dielectric properties of (1−x)(Ca0.88Sr0.12)TiO3–x(Bi0.5Na0.5)TiO3 high dielectric constant ceramics

Cited by 4 publications

References 19 publications

Phase equilibria of MgO–Al2O3–TiO2 system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Phase equilibria of MgO–Al2O3–TiO2 system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Effect of Microwave Sintering on the Properties of 0.95(Ca0.88Sr0.12)TiO3–0.05(Bi0.5Na0.5)TiO3 Ceramics

Enhanced dielectric properties of polyimide composites by doping metal amidoxime polycarylonitrile

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Phase equilibria of MgO–Al₂O₃–TiO₂ system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases

Phase equilibria of MgO–Al₂O₃–TiO₂ system at 1600°C in air: Emphasis on pseudobrookite and spinel solid solution phases