Luminescence of High-Pressure Phases of Eu2+ Activated Alkaline Earth Borates and Silicates

  • Gin-ya Adachi
  • Ken-ichi Machida
  • Jiro Shiokawa

Abstract

Luminescence properties of the high-pressure phases of Eu2+ activated alkaline earth borates (MB2O4:Eu2+) and silicates (MSiO3: Eu2+) were studied. Their quantum efficiencies increased strikingly with transformation from low pressure to high pressure phases. One of the high pressure forms of the metaborates, cubic Sr1−xEuxB2O4(x=0.01), was found to be an efficient photoluminescent material. The quenching effect owing to the interaction between the neighboring Eu2+ ions in the high-pressure phase is expected to be small compared with that in an atmospheric pressure phase. The same phase transformation effect was observed for Eu2+-activated silicates, Ca1−xEuxSiO3 and Sr1−xEUxSiO3.

Keywords

Silicate Boron Borate Strontium Metaborates 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    M. Marezio, J.P. Remeika and P.D. Dernier, “The crystal structure of the high pressure phase, CaB2O4(IV), and polymorphism in CaB2O4”, Acta Cryst., 825: 965 (1969).Google Scholar
  2. 2.
    A.E. Ringwood and A. Major, “Some high-pressure transformations of geophysical significance”, Earth and Planetary Sci. Lett., 2:106 (1967).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Gin-ya Adachi
    • 1
  • Ken-ichi Machida
    • 1
  • Jiro Shiokawa
    • 1
  1. 1.Department of Applied Chemistry, Faculty of EngineeringOsaka University YamadakamiSuita, OsakaJapan

Personalised recommendations