ISSN:
1573-4870
Keywords:
Amorphous silica
;
luminescent properties
;
polymorphism
;
alkali metal additives
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The correlation of luminescent properties to the polymorphism in sintered amorphous spherical silica with alkali metal additives has been investigated. The luminescent properties and the crystalline phases changed with the different kinds of alkali metal additives, and the firing temperature. The blue luminescence at 470 nm was observed for all amorphous sintered silica containing Na2O, K2O, Rb2O or Cs2O, while the yellowish green luminscence at 545 nm was for some crystalline sintered silica. The blue luminescence was assumed to be related to defects produced by dehydration of silanol groups and the yellowish green ones in crystalline and liquid phases.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022695025753
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