Ti3+-Free Multicomponent Titanophosphate Glasses as Ecologically Sustainable Optical Glasses
| Autor: | Hiroyuki Nasu, Tadanori Hashimoto, Kanichi Kamiya |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Journal of the American Ceramic Society. 89:2521-2527 |
| ISSN: | 1551-2916 0002-7820 |
| DOI: | 10.1111/j.1551-2916.2006.01101.x |
| Popis: | Ti3+-free multicomponent titanophosphate glasses were developed as ecologically sustainable optical glasses. Especially, recent advances in the glasses as molding glass, athermal glass, nonlinear optical glass, and self-cleaning glass were presented. The Ti3+-free binary TiO2–P2O5 glasses containing TiO2 up to 74 mol% were prepared by melt quenching and long-term post-annealing around the glass transition temperature in the air, and possessed high transparency, high index, high dispersion, and low density. Li2O–ZnO–TiO2–P2O5 glasses have the lowest Tg (=560°C) among titanophosphate glasses, with high index (nd=1.8), and high dispersion (νd=22) being retained, while ZnO–TiO2–P2O5 glasses have the highest refractive index (nd=1.9) among glasses with Tg lower than 600°C. Thus, ZnO–TiO2–P2O5 and Li2O–ZnO–TiO2–P2O5 glasses can be expected as high-index molding glasses. A very small temperature coefficient of refractive index, dn/dT, or very small temperature coefficient of optical path length, dS/dT, was obtained for K2O–TiO2–P2O5 glasses, meaning that they are considered as high-index athermal glasses and athermal NLO glasses. Ag2O–TiO2–P2O5 glasses showed photocatalytic activity and photo-induced hydrophilicity comparable with commercially available TiO2-coated self-cleaning glasses. |
| Databáze: | OpenAIRE |
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