Optical properties and weakening of elastic moduli with increasing glass transition temperature (Tg) in (80-x)TeO2-xBaO-20ZnO glasses

Muliana Ismail, Siti Nurbaya Supardan, Ahmad Kamal Yahya, Roslan Abd. Shukor

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

BaO addition to ternary (80-x)TeO2-20ZnO-xBaO (x = 0-20 mol.%) glasses resulted in a decrease in ultrasonic velocities and independent elastic moduli; this result indicated that the rigidity of the glass network weakened possibly because non-bridging oxygen increased. Thermal analysis results showed that glass transition temperature increased as BaO content increased because of the stabilizing effect of Ba2+ on the glass network. Additional analyses using bulk compression and ring deformation models revealed that the ratio between theoretical bulk modulus and experimental bulk modulus increased; this result indicated that the compression mechanism mainly involved isotropic ring compression. Furthermore, the increase in non-bridging oxygen formation with BaO addition caused a decrease in optical energy gap and an increase in refractive index. An increase in Urbach energy indicated that the degree of disorder in the glass system also increased.

Original languageEnglish
Pages (from-to)893-901
Number of pages9
JournalInternational Journal of Materials Research
Volume106
Issue number8
DOIs
Publication statusPublished - 1 Aug 2015

Fingerprint

glass transition temperature
modulus of elasticity
Optical properties
Elastic moduli
optical properties
Glass
glass
bulk modulus
Oxygen
Ultrasonic velocity
rings
oxygen
rigidity
Rigidity
Thermoanalysis
Refractive index
thermal analysis
Energy gap
Compaction
ultrasonics

Keywords

  • Elastic moduli
  • Glass transition temperature
  • Optical energy gap
  • Tellurite glass
  • Ultrasonic velocity

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Optical properties and weakening of elastic moduli with increasing glass transition temperature (Tg) in (80-x)TeO2-xBaO-20ZnO glasses. / Ismail, Muliana; Supardan, Siti Nurbaya; Yahya, Ahmad Kamal; Abd. Shukor, Roslan.

In: International Journal of Materials Research, Vol. 106, No. 8, 01.08.2015, p. 893-901.

Research output: Contribution to journalArticle

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