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Title: Reactive flash sintering of the complex oxide Li 0.5La 0.5TiO 3 starting from an amorphous precursor powder

Abstract

We report the transformation of an amorphous mixture of Li 0.5La 0.5TiO 3 (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:
ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [3]; ORCiD logo [1]; ORCiD logo [4]
  1. Univ. of Colorado, Boulder, CO (United States). Materials Science and Engineering Program, Dept. of Mechanical Engineering
  2. Federal Univ. of Sergipe, São Cristóvão (Brazil). Group of Functional Nanomaterials, Dept. of Physics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II
  4. 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:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1574121
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.
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. doi:10.1016/j.scriptamat.2019.09.037.
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. doi:10.1016/j.scriptamat.2019.09.037.
@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 = {2019},
month = {10}
}

Journal Article:
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This content will become publicly available on October 9, 2020
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