Effect of Annealing Temperature on Optical Transparency of Silica Xerogels
DOI:
https://doi.org/10.2025/nf1g8140Abstract
This letter explores the effect of annealing temperature in the range of 100-1000°C on the optical transparency of the xerogels synthesized by cryogenic compression technique. Results showed that the optical transparency of the synthesized xerogels showed a nonlinear behavior as it increased from <5% to 85% at 400°C and then sharply decreased to <15% at high temperatures (800-1000°C) due to the collapse of pores and formation of crystalline phases and defects within the structure.
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