Dr. Dawei Wang Profile

Dr. Dawei Wang

at Univ of Science & Technology

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SPIE Journal Paper | 1 December 2003

Fabrication of Ag-doped polarizing glass by a sol-gel method

Dawei Wang, Shiju Guo, Sheng Yin

OE, Vol. 42, Issue 12, (December 2003) https://doi.org/10.1117/12.10.1117/1.1623284

KEYWORDS: Glasses, Particles, Silver, Sol-gels, Heat treatments, Scanning electron microscopy, Absorption, X-ray diffraction, Crystals, Photomicroscopy

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A new method, extrusion after a sol-gel process, is put forward for fabricating Ag-doped polarizing glass, which has some special optical characteristics according to the size and shape of the silver particles in the glass. The results of x-ray diffraction and differential thermal analysis show that the glass from the gel had a similar structure to that from quenching from a melt. Experiments on heat treatment showed that to get a suitable size of silver particles the glass should be held 0.5 h at 630°C and the time at temperatures above 500°C should be controlled. From scanning electron microscopy and absorption spectra it can be concluded that the elongated silver particles have been produced and the polarizing property has been achieved in the wavelength range from 850 to 1100 nm after extrusion. The silver particles were formed, not just on the surface, but almost throughout the glass, indicating that this new method is an easy way to produce Ag-doped polarizing glass.

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