Synthesis and characterization of bulk, vitreous cadmium germanium arsenide

Bradley R. Johnson, Brian J. Riley, Shanmugavelayutham K. Sundaram, Jarrod V. Crum, Charles H. Henager, Yanwen Zhang, Vaithiyalingam Shutthanandan, Carolyn E. Seifert, Renee M. Van Ginhoven, Clyde E. Chamberlin, Angus A. Rockett, Damon N. Hebert, Angel R. Aquino

Research output: Contribution to journalArticlepeer-review


Cadmium germanium diarsenide glasses were synthesized in bulk form (∼2.4 cm 3) using procedures adapted from the literature. Several issues involved in the fabrication and quenching of amorphous CdGe xAs 2 (x=0.45, 0.65, 0.85, and 1.00, where x is the molar ratio of Ge to 1 mol of Cd) are described. An innovative processing route is presented to enable fabrication of high-purity, vitreous, crack-free ingots with sizes up to 10 mm diameter, and 30-40 mm long. Specimens from selected ingots were characterized using thermal analysis, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, particle-induced X-ray emission, Rutherford backscattering, secondary ion mass spectrometry, X-ray diffraction, density, and optical spectroscopy. Variations in properties as a function of processing conditions and composition are described. Results show that the density of defect states in the middle of the band gap and near the band edges can be decreased three ways: through suitable control of the processing conditions, by doping the material with hydrogen, and by increasing the concentration of Ge in the glass.

Original languageEnglish (US)
Pages (from-to)1236-1243
Number of pages8
JournalJournal of the American Ceramic Society
Issue number6
StatePublished - Jun 2009

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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