Title: Size dependent arsenic volatilization in ErAs nanoparticle powders

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/1.5048191 · OSTI ID:1611023

The thermal stability of ErAs nanoparticles and bulk-like powders, synthesized by pulsed laser ablation and direct reaction, respectively, is investigated up to 700 °C in N2. Thermogravimetric analysis and XRD are used to monitor the decomposition temperatures and crystalline compositions of the synthesized powders, respectively. Degradation of unagglomerated nanoparticle powders is observed at 350°C accompanied by the crystallization of amorphous Er2O3. Mass balance analysis suggests that the mass loss occurs as a result of arsenic volatilization rather than congruent sublimation of ErAs. Conversely, micron-sized agglomerated particles grown by direct reaction show little evidence for degradation under similar thermal processing conditions. This significant decrease in ErAs stability compared to agglomerated powders suggests a size dependence on the degradation characteristics of ErAs.

Research Organization:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0008166
OSTI ID:
1611023
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 16 Vol. 113; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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