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Sintering of optical porous glasses

Antropova T. V., Drozdova I. A.

Optica Applicata

2003

Vol. 33, nr 1

13-22

The changes in the visible light transmission of the optical porous glasses (PGs), arising from PGs thermal treatment, have been investigated by transmission electron microscopy and optical spectroscopy technique. Also the PGs thermal properties such as linear shrinkage and viscosity have been studied. These PGs are used in optics and laser technology as the base for the micro- optical elements produced by a local laser sintering of PGs.

Porous glass: inhomogeneities and light transmission.

Antropova T.V., Drozdova I.A., Yastrebov S.G., Evstrapov A.A.

Optica Applicata

2000

Vol. 30, nr 4

553-568

Basic optical characteristics were studied to reveal the structure of porous glass samples. Acid leaching technology was used to manufacture porous glasses from the bulk of phase-separated alkali borosilicate glasses. The transmission electron microscopy, selected area diffraction and shadow graph techniques, optical microscopy and spectrophotometry, reflective ellipsometry were used to obtain new information about some inhomogeneities such as strata and spindle-like silica precipitates as well as boron containing microcrystalline phases inside porous glasses.