Applied Surface Science 442 (2018) 12–19 Contents lists available at ScienceDirect Applied Surface Science journal homepage: www.elsevier.com/locate/apsusc Full Length Article Preparation and ﬂash sintering of MgTiO nanopowders obtained by the polyacrylamide gel method Xinghua Su , Ge Bai, Jing Zhang, Jie Zhou, Yongjie Jia School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China ar ti c l e i nf o ab stra ct Article history: Using a polyacrylamide gel method, phase pure and well-dispersed MgTiO nanopowders were prepared Received 23 November 2017 at 800 C for 2 h. It was found that a high mole ratio of monomers to precursors resulted in low formation Revised 23 January 2018 temperature of MgTiO , due to the highly mixing homogeneity and smaller particle sizes of precursors. Accepted 31 January 2018 Sintering behaviors of MgTiO nanopowders under DC electric ﬁeld from 500 to 800 V/cm were investi- Available online 6 February 2018 gated. Nearly full dense MgTiO ceramics can be prepared in 30 s. An abrupt and simultaneous increase in current density and power dissipation were observed in sintering process, which are characteristics of Keywords: ﬂash sintering. The power dissipation for the ﬂash sintering was found to be 82
Applied Surface Science – Elsevier
Published: Jun 1, 2018
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