Issue 26, 2022, Issue in Progress

Enhancement of dielectric performance of encapsulation in barium titanate oxide using size-controlled reduced graphene oxide

Abstract

Ferroelectric barium titanate (BTO) powder particles were encapsulated by three different sizes of reduced graphene oxide (rGO) platelets. The size of the graphene oxide (GO) platelets is controlled by varying the horn type ultrasonic times, i.e. 0, 30, and 60 min, respectively, and they are reduced with hydrazine to obtain rGO-encapsulated BTO (rGO@BTO) film. The rGO@BTO film exhibits an increase in the dielectric characteristics due to the interfacial polarization. These improved characteristics include a dielectric constant of 194 (a large increment of 111%), along with the dielectric loss of 0.053 (a slight increment of 13%) at 1 kHz, compared to the pure BTO dielectric film. The improvement in the dielectric constant of the rGO@BTO is attributed to the encapsulation degree between the rGO platelets and BTO powder particles, which results in the interfacial polarization and micro-capacitor effect in a dielectric film, and also contributes to a low dielectric loss. Therefore, a suitable size of rGO platelets for encapsulation is essential for high-dielectric performance.

Graphical abstract: Enhancement of dielectric performance of encapsulation in barium titanate oxide using size-controlled reduced graphene oxide

Article information

Article type
Paper
Submitted
25 Feb 2022
Accepted
23 May 2022
First published
01 Jun 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 16412-16418

Enhancement of dielectric performance of encapsulation in barium titanate oxide using size-controlled reduced graphene oxide

S. Jun, S. Park, N. W. Baek, T. Lee, S. Yoo, D. Jung and J. Kim, RSC Adv., 2022, 12, 16412 DOI: 10.1039/D2RA01266A

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