Experimental determination of solidified lithium disilicate crystal bandgap energy using EELS and XPS

Research output: Contribution to journalArticlepeer-review

Abstract

Lithium disilicate (LS2) has been a crucial parent composition for glass-ceramics since the 1950s because of its excellent chemical and physical durability. In addition, a wide range of electrical properties can be obtained by changing the composition and crystallinity. Bandgap energy is one of the critical electrical properties for designing new lithium silicate-based materials. In this study, the bandgap energy of a synthesized LS2 crystal is evaluated using electron energy-loss spectroscopy and X-ray photoelectron spectroscopy. These two techniques unambiguously establish that the bandgap energy of LS2 is 7.7-7.8 eV, which is in the vacuum ultraviolet region. This confirms the insulating nature of the LS2 crystal.

Original languageEnglish
Pages (from-to)5139-5144
Number of pages6
JournalJournal of the American Ceramic Society
Volume103
Issue number9
DOIs
Publication statusPublished - 2020 Sep 1

Keywords

  • X-ray photoelectron spectroscopy (XPS)
  • bandgap
  • electron energy-loss spectroscopy (EELS)
  • lithium disilicate

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Experimental determination of solidified lithium disilicate crystal bandgap energy using EELS and XPS'. Together they form a unique fingerprint.

Cite this