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On the unusual amber coloration of nanoporous sol-gel processed Al-doped silica glass: An experimental study.


ABSTRACT: Silica is the most abundant component on the earth's surface. It plays an important role in many natural processes. Silica is also a critical material for a wide range of technical applications such as in optics and electronics. In this work, we discuss our recent experimental observation of the unusual amber coloration of aluminum doped sol-gel glass that has not been reported in the past. We characterized Al-doped sol-gel glasses, prepared at different sintering temperature, using a plethora of techniques to investigate the origin of this unusual coloration and to understand their structural and chemical properties. We used these experimental results to test a number of possible coloring mechanisms. The results suggested this coloring is likely caused by temperature-dependent aluminum-associated defect centers associated with different amorphous-to-crystalline ratios of the annealed sol-gel silica glass structures.

SUBMITTER: Chang A 

PROVIDER: S-EPMC6713779 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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On the unusual amber coloration of nanoporous sol-gel processed Al-doped silica glass: An experimental study.

Chang Alvin A   He Yujuan Y   Arango Maria A Torres MAT   Wang Maoyu M   Ren Yang Y   Feng Zhenxing Z   Chang Chih-Hung CH   Sierros Konstantinos A KA  

Scientific reports 20190828 1


Silica is the most abundant component on the earth's surface. It plays an important role in many natural processes. Silica is also a critical material for a wide range of technical applications such as in optics and electronics. In this work, we discuss our recent experimental observation of the unusual amber coloration of aluminum doped sol-gel glass that has not been reported in the past. We characterized Al-doped sol-gel glasses, prepared at different sintering temperature, using a plethora o  ...[more]

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