Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder

Avila, Viviana; Yoon, Bola; Ingraci Neto, Rubens R.; Silva, Ronaldo S.; Ghose, Sanjit; Raj, Rishi; Jesus, Lílian M.

doi:10.1016/j.scriptamat.2019.09.037

Title: Reactive flash sintering of the complex oxide Li_0.5La_0.5TiO₃ starting from an amorphous precursor powder

Abstract

We report the transformation of an amorphous mixture of Li_0.5La_0.5TiO₃ (LLTO) directly into a single phase dense polycrystal, all within a few seconds at about 800°C by the flash method. The starting material is a chemically-prepared precursor powder that experiences concurrent crystallization and densification to cubic LLTO during the flash event, as shown by in-situ X-ray measurements. The experiments were conducted at a constant heating rate with fields from 80 to 120 V cm^–1 and a current limit of 60 mA mm^–2. Here, the resulting polycrystal yielded a bulk conductivity of 0.5 mS cm^–1.

Authors:

^[1]; Yoon, Bola ^[1]; Ingraci Neto, Rubens R. ^[1];

^[2]; Ghose, Sanjit ^[3];

^[1];

^[4]

Univ. of Colorado, Boulder, CO (United States). Materials Science and Engineering Program, Dept. of Mechanical Engineering
Federal Univ. of Sergipe, São Cristóvão (Brazil). Group of Functional Nanomaterials, Dept. of Physics
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II
Univ. of Colorado, Boulder, CO (United States). Materials Science and Engineering Program, Dept. of Mechanical Engineering; Federal Univ. of São Carlos (UFSCar), São Carlos (Brazil). Group of Advanced Functional Materials

Publication Date:: Wed Oct 09 00:00:00 EDT 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1574121

Alternate Identifier(s):: OSTI ID: 1780082

Report Number(s):: BNL-212312-2019-JAAM
Journal ID: ISSN 1359-6462

Grant/Contract Number:: SC0012704

Resource Type:: Accepted Manuscript

Journal Name:: Scripta Materialia

Additional Journal Information:: Journal Volume: 176; Journal Issue: C; Journal ID: ISSN 1359-6462

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Reactive flash; Powder processing; X-ray diffraction (XRD); Synchrotron radiation; Electrical properties

Citation Formats


                    Avila, Viviana, Yoon, Bola, Ingraci Neto, Rubens R., Silva, Ronaldo S., Ghose, Sanjit, Raj, Rishi, and Jesus, Lílian M. Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder.  United States: N. p., 2019. 
Web.  doi:10.1016/j.scriptamat.2019.09.037.

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                    Avila, Viviana, Yoon, Bola, Ingraci Neto, Rubens R., Silva, Ronaldo S., Ghose, Sanjit, Raj, Rishi, & Jesus, Lílian M. Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder.  United States.  https://doi.org/10.1016/j.scriptamat.2019.09.037

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                    Avila, Viviana, Yoon, Bola, Ingraci Neto, Rubens R., Silva, Ronaldo S., Ghose, Sanjit, Raj, Rishi, and Jesus, Lílian M. Wed .  
"Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder".  United States.  https://doi.org/10.1016/j.scriptamat.2019.09.037.  https://www.osti.gov/servlets/purl/1574121.

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@article{osti_1574121,

  title        = {Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder},

  author       = {Avila, Viviana and Yoon, Bola and Ingraci Neto, Rubens R. and Silva, Ronaldo S. and Ghose, Sanjit and Raj, Rishi and Jesus, Lílian M.},

  abstractNote = {We report the transformation of an amorphous mixture of Li0.5La0.5TiO3 (LLTO) directly into a single phase dense polycrystal, all within a few seconds at about 800°C by the flash method. The starting material is a chemically-prepared precursor powder that experiences concurrent crystallization and densification to cubic LLTO during the flash event, as shown by in-situ X-ray measurements. The experiments were conducted at a constant heating rate with fields from 80 to 120 V cm–1 and a current limit of 60 mA mm–2. Here, the resulting polycrystal yielded a bulk conductivity of 0.5 mS cm–1.},

  doi          = {10.1016/j.scriptamat.2019.09.037},

  journal      = {Scripta Materialia},

  number       = C,

  volume       = 176,

  place        = {United States},

  year         = {Wed Oct 09 00:00:00 EDT 2019},

  month        = {Wed Oct 09 00:00:00 EDT 2019}

}

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https://doi.org/10.1016/j.scriptamat.2019.09.037

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Cited by: 26 works

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Figures / Tables:

Fig. 1: (a) Arrhenius plot for the power dissipation P _w and (b) true linear strain as a function of furnace temperature, for samples processed at different field strengths. For all these experiments the current density limit was set as J = 60 mA mm ⁻² .

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Title: Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder

Abstract

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Title: Reactive flash sintering of the complex oxide Li_0.5La_0.5TiO₃ starting from an amorphous precursor powder