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Hydrothermal synthesis and characterization of the eulytite phase of bismuth germanium oxide powders

Published online by Cambridge University Press:  16 May 2014

Timothy J. Boyle ,
Eric Sivonxay ,
Pin Yang ,
Mark A. Rodriguez ,
Bernadette A. Hernandez-Sanchez ,
Nelson S. Bell ,
Andrew Velazquez ,
Bryan Kaehr ,
Marlene Bencomo  and
James J.M. Griego
...Show all authors
Timothy J. Boyle*
Affiliation:
Sandia National Laboratories, Advanced Materials Laboratory, Albuquerque, New Mexico 87106
Eric Sivonxay
Affiliation:
Sandia National Laboratories, Advanced Materials Laboratory, Albuquerque, New Mexico 87106
Pin Yang
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-0958
Mark A. Rodriguez
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-1411
Bernadette A. Hernandez-Sanchez
Affiliation:
Sandia National Laboratories, Advanced Materials Laboratory, Albuquerque, New Mexico 87106
Nelson S. Bell
Affiliation:
Sandia National Laboratories, Advanced Materials Laboratory, Albuquerque, New Mexico 87106
Andrew Velazquez
Affiliation:
Sandia National Laboratories, Advanced Materials Laboratory, Albuquerque, New Mexico 87106
Bryan Kaehr
Affiliation:
Sandia National Laboratories, Advanced Materials Laboratory, Albuquerque, New Mexico 87106
Marlene Bencomo
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-0958
James J.M. Griego
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185-1411
Patrick Doty
Affiliation:
Sandia National Laboratories, Livermore, California 94551-0969
*
a)Address all correspondence to this author. e-mail: tjboyle@Sandia.gov
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Abstract

A simple hydrothermal route to the eulytite phase of bismuth germanium oxide (E-BGO: Bi4(GeO4)3) that required no post-processing has been developed. The E-BGO material was isolated from a mixture of bismuth nitrate pentahydrate and a slight excess of germanium oxide in water under hydrothermal conditions (185 °C for 24 h). The resultant materials were characterized by powder x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and luminescence measurements to verify the particle's phase (eulytite), morphology, size, and response to a variety of excitation energy sources, respectively. Photoluminescence spectroscopic response from E-BGO pellets indicated that the samples exhibited a strong emission peak consistent with an x-ray induced luminescence of a E-BGO single crystal (500 nm excited at 285 nm). Cathodoluminescent properties of the E-BGO displayed a broadband spectrum with a maximum at 487 nm. The growth process was consistent with a standard Oswald ripening and LaMer growth processes.

Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 10 , 28 May 2014 , pp. 1199 - 1209
Copyright
Copyright © Materials Research Society 2014 

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References

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