Reactive flash sintering of the complex oxide Li0.5La0.5TiO3 starting from an amorphous precursor powder. (February 2020)

• Record Type: Journal Article
• Authors: Avila, Viviana; Yoon, Bola; Ingraci Neto, Rubens R.; Silva, Ronaldo S.; Ghose, Sanjit; Raj, Rishi; Jesus, Lílian M.
• Is Part Of: Scripta materialia. Number 176(2020)
• Page Start: 78
• Page End: 82
• Publication Date: 2020-02
• Subjects: Reactive flash -- Powder processing -- X-ray diffraction (XRD) -- Synchrotron radiation -- Electrical properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.09.037
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report the transformation of an amorphous mixture of Li0.5 La0.5 TiO3 (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 . The resulting polycrystal yielded a bulk conductivity of 0.5 mS cm –1 . Graphical abstract: Image, graphical abstract