Strontium-Barium glasses

Strontium, Barium Strontium was discovered near, and named after, the small town of Strontian, Scotland, in 1787. There are no commercial uses for the pure metal, but the carbonate salt, SrC03, is used in the manufacture of glass for color TV picture tubes. Barium is found principally in the minerals witherite (BaC03) and barite (BaSC ), after which it is named. Though water-soluble salts of barium are extremely toxic, barium sulfate is so insoluble that it is used in medicine as a contrast medium for stomach and intestinal X rays. Like strontium, barium metal has no commercial uses, but various compounds are used in glass manufacture and in drilling oil wells. 

FEMTOSECOND LASER MODIFICATION ON STRONTIUM BARIUM NIOBATE GLASSES DOPED WITH Er IONS... 

A localized modification of the optical properties in Er " doped Strontium Barium Niobate (SBN) glasses using a femtosecond laser were carried out. The samples were irradiated with a different number of pulses per spot at two laser fluences. 

In this work, erbium doped strontium barium niobate glasses have been irradiated with a femtosecond laser. The properties of these glasses and the changes induced by a cw laser have been studied in a previous paper . Optical measurements show the changes of the local structure in a localized area after the irradiation and they arc compared with the bulk glass ceramic sample obtained by thermal treatment with a furnace. 

Localized zone of strontium barium niobate glass doped with Er were irradiated by using a femtosecond laser at two different fluences and varying the number of pulses per spot. Inside these irradiated areas, the emission spectra of the Er SMl Hn/a) -> lu/2, lii/2 -> I15/2 and ln/2 -> Ii5,2 transitions were measured. 

Femtosecond Laser Modification on Strontium Barium Nbbate Glasses Doped with Er Ions... 

A second problem with lead glasses is disposal of obsolete tubes. Today, such tubes either must be remanufactured or the glass in them recycled. Disposal in land fills is too expensive. Fortunately, changes in glass composition have allowed lead oxide in glass to be replaced by a mixture of strontium, barium, and zirconium oxides. 

Barium-Magnesium-Strontium-Based Glasses/Electrolyte Interface... 

Crimson Strontium compounds (masked by barium), appear violet through cobalt glass, yellowish through green glass. 

Highly pure lanthanum oxide is used to make optical glass of high refractive index for camera lenses. It also is used to make glass fibers. The oxide also is used to improve thermal and electrical properties of barium and strontium titanates. Other applications are in glass polishes carbon arc electrodes fluorescent type phosphors and as a diluent for nuclear fuels. In such apph-cations, lanthinum oxide is usually combined with other rare earth oxides. 

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