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3 Optica Applicata

3 2000

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High temperature treatment of porous glasses.

100%

Marczuk K. , Pater K.

2000

tom Vol. 30, nr 4

619-625

The influence of thermal treatment on linear sizes and the internal structure of porous glasses has been investigated. A simple connection between porosity and shrinkage has been confirmed to exist except in microporous glasses with silica gel inside the pores, where in the initial stage of annealing the porosity was increasing when the glass shrank. A sponge structure of fracture mirrors of the walls of a carcass for glasses heated at about 650 degrees C is observed.

Studies of the properties of copper-cadmium photochromic glasses.

80%

Rysiakiewicz-Pasek E. , Marczuk K. , Ziemba B.

2000

tom Vol. 30, nr 4

671-676

The properties of photochromic glasses containing copper and cadmium chloride were investigated. The influence of the temperature and time of heat treatment on the change of the glass structure was considered. The parameters (coefficients) determining the bleaching process were calculated. To study the structure of photochromic glasses after heating the thermally stimulated depolarization technique was applied. The origin of TSDC peaks was discussed.

Influence of gamma -irradiation on the photoluminescent properties of porous glasses.

70%

Gevelyuk S. A. , Lishchuk D. E. , Mak V. T. , Rysiakiewicz-Pasek E. , Marczuk K.

2000

tom Vol. 30, nr 4

595-603

The influence of small doses of gamma -irradiation on the features of the photoluminescence spectra of porous silica glass during long-time (several months) storage after the irradiation is investigated. The non-monotonic dependence of photoluminescence change on the dose of the glasses with a different composition and different additional pre-treatment is observed. The analysis of intensity changes and shifts of the maxims of the photoluminescence spectra shows long-time oscillations. This indicates that the composite catalytic processes take place on the surface of the pores. Perhaps the small gamma -radiation doses initiate the cyclic process of the surface state transformation on the inner side of the pores.