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

SCRIPTA MATERIALIA

卷:176

Article

Avila, Viviana¹  Yoon, Bola¹  Ingraci Neto, Rubens R.¹  Silva, Ronaldo S.²  Ghose, Sanjit³  Raj, Rishi¹  Jesus, Lilian M.^1,4 

[1] UCB, Dept Mech Engn, Mat Sci & Engn Program, Boulder, CO 80309 USA

[2] Univ Fed Sergipe, Dept Phys, Grp Funct Nanomat, BR-49100000 Sao Cristovao, SE, Brazil

[3] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA

[4] Fed Univ Sao Carlos UFSCar, Dept Phys, Grp Adv Funct Mat, BR-13565905 Sao Carlos, SP, Brazil

关键词: Reactive flash;    Powder processing;    X-ray diffraction (XRD);    Synchrotron radiation;    Electrical properties;   

DOI  :  10.1016/j.scriptamat.2019.09.037

来源: Elsevier

【 摘 要 】

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 degrees 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 120V cm(-1) and a current limit of 60 mA mm(-2). The resulting polycrystal yielded a bulk conductivity of 0.5 mS cm(-1). (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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