Počet záznamů: 1
Optical properties of Na2O-TiO2-SiO2 glass films prepared by the sol-gel method
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SYSNO ASEP 0485711 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Optical properties of Na2O-TiO2-SiO2 glass films prepared by the sol-gel method Tvůrce(i) Bartoň, Ivo (URE-Y) ORCID, RID
Matějec, Vlastimil (URE-Y)
Mrázek, Jan (URE-Y) RID, ORCID
Predoana, L. (RO)
Zaharescu, M. (RO)Celkový počet autorů 5 Číslo článku 106030R Zdroj.dok. Proceedings of SPIE - The International Society for Optical Engineering 2017, Photonics, Devices, and Systems VII, 10603. - Bellingham : SPIE: The Society of Photo-Optical Instrumentation Engineers, 2017 / Fliegel K. ; Páta P. - ISSN 0277-786X - ISBN 978-1-5106-1702-5 Poč.str. 7 s. Forma vydání Tištěná - P Akce Photonics, Devices, and Systems VII 2017 Datum konání 28.08.2017 - 30.08.2017 Místo konání Prague Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova sol-gel method ; transmission spectra ; glass slide Vědní obor RIV JH - Keramika, žáruvzdorné materiály a skla Obor OECD Ceramics CEP GA16-10019S GA ČR - Grantová agentura ČR Institucionální podpora URE-Y - RVO:67985882 UT WOS 000425429900026 DOI 10.1117/12.2293509 Anotace Layers based on TiO2-SiO2 systems fabricated by sol-gel method have been investigated for the preparation of planar waveguides, antireflective coatings, Bragg mirrors, etc. However, at high titania contents such materials exhibit high viscosities and tendency to phase separation. In this paper we present optical properties of films containing TiO2 which are prepared via a novel approach sol-gel on the basis of ternary Na2O-TiO2-SiO2 glasses and which can exhibit lower viscosities. Films of Na2O-TiO2-SiO2 systems were prepared from input sols mixed of silica, titania and sodium oxide sols. The silica sol was prepared from tetraethyl orthosilicate (TEOS), ethanol, hydrochloric acid and water, with a TEOS c= 2 mol/l and water/alkoxide ratio 1.75. The titania sol was mixed from titanium tetraisopropoxide (TiPr), propan-2-ol, nitric acid and water, c= 0.5 mol/l, RW= 0.42. The sodium oxide sols with c= 0.474 mol/l were prepared from sodium ethoxide and ethanol. Input sols were prepared by mixing the silica and titania sols first and then the sodium sol was added. The input sols were aged for one hour. Stable input sols were obtained. The input sols were deposited on glass and silica slides by dip-coating technique at a withdrawing speeds of 200 mm/min. Applied gel layers were thermally treated at temperatures of 450 and 900°C. Layers containing sodium oxide and titania in concentration ranges of 0-20 mol.% and 0-30 mol.% respectively have been fabricated. Optical properties of layers were determined by UV-VIS-NIR transmission and reflection spectrophotometry. Refractive indices of layers were determined by spectral ellipsometry and from transmission spectra. Optical properties were correlated with results of XRD spectroscopy, optical microscopy, and atomic force microscopy. Transparent homogenous films with a maximum refractive index of 1.61 at a wavelength of 600 nm have been obtained Pracoviště Ústav fotoniky a elektroniky Kontakt Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Rok sběru 2018
Počet záznamů: 1