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Dense Na 0.5K 0.5NbO 3 Ceramics Produced by Reactive Flash Sintering of NaNbO 3-KNbO 3 Mixed Powders

22 Pages Posted: 18 Jul 2019 First Look: Accepted

See all articles by Yajuan Wu

Yajuan Wu

Chang’an University - School of Materials Science and Engineering

Xinghua Su

Chang’an University - School of Materials Science and Engineering; Chang’an University - Engineering Research Center of Ministry of Education of Transportation Materials

Gai An

Chang’an University - School of Materials Science and Engineering

Weixin Hong

Chang’an University - School of Materials Science and Engineering

Abstract

Dense Na0.5K0.5NbO3 ceramics are successfully produced by reactive flash sintering of the NaNbO3-KNbO3 mixed powders, which enables the chemical reaction and sintering to take place simultaneously, skipping the preparation process of Na0.5K0.5NbO3 powders that is required in conventional production. The as-prepared Na0.5K0.5NbO3 ceramics exhibit the high piezoelectric coefficient d33. Besides the Joule heating, generation of high concentration of defects are proposed to explain the rapid reaction and sintering rates during the reactive flash sintering. This study presents a cost-effective way to prepare dense and pure ceramic materials from their basic constituents in one step at low temperature in short time.

Keywords: Na0.5K0.5NbO3, Reaction, Flash sintering, Electric field, Joule heating

Suggested Citation

Wu, Yajuan and Su, Xinghua and An, Gai and Hong, Weixin, Dense Na 0.5K 0.5NbO 3 Ceramics Produced by Reactive Flash Sintering of NaNbO 3-KNbO 3 Mixed Powders (2019). Available at SSRN: https://ssrn.com/abstract=3421342

Yajuan Wu (Contact Author)

Chang’an University - School of Materials Science and Engineering

Xi’an
China

Xinghua Su

Chang’an University - School of Materials Science and Engineering ( email )

Xi’an
China

Chang’an University - Engineering Research Center of Ministry of Education of Transportation Materials ( email )

Xi’an
China

Gai An

Chang’an University - School of Materials Science and Engineering

Xi’an
China

Weixin Hong

Chang’an University - School of Materials Science and Engineering

Xi’an
China

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