Carbon nanotube/graphene oxide-added CaO-B2O3-SiO2 glass/Al2O3 composite as substrate for chip-type supercapacitor

Tae Ho Lee, Sung Hoon Cho, Tae Gon Lee, Hyo Tae Kim, In Kyu You, Sahn Nahm

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A CaO-B2O3-SiO2 (CBS) glass/40 wt% Al2O3 composite sintered at 900°C exhibited a dense microstructure with a low porosity of 0.21%. This composite contained Al2O3 and anorthite phases, but pure glass sintered at 900°C has small quantities of wollastonite and diopside phases. This composite was measured to have a high bending strength of 323 MPa and thermal conductivity of 3.75 W/(mK). The thermal conductivity increased when the composite was annealed at 850°C after sintering at 900°C, because of the increase in the amount of the anorthite phase. 0.25 wt% graphene oxide and 0.75 wt% multi-wall carbon nanotubes were added to the CBS/40 wt% Al2O3 composite to further enhance the thermal conductivity and bending strength. The specimen sintered at 900°C and subsequently annealed at 850°C exhibited a large bending strength of 420 MPa and thermal conductivity of 5.51 W/(mK), indicating that it would be a highly effective substrate for a chip-type supercapacitor.

Original languageEnglish
JournalJournal of the American Ceramic Society
DOIs
Publication statusAccepted/In press - 2018 Jan 1

Keywords

  • Ceramic-metal systems
  • Glass-ceramics
  • Low-temperature co-fired ceramics
  • Mechanical properties
  • Thermal conductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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