Synthesis and characterization of silane based binder for the amorphous metal ribbon

Nieroda, Jolanta; Rybak, Andrzej; Kmita, Grzegorz; Nizioł, Jacek; Gondek, E.; Sitarz, Maciej

doi:10.1016/j.tsf.2020.138433

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2021

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“…It is therefore only a plausible hypothesis; however, it is supported by similar observations for analogous systems. For example, the combination of TEOS and a less polar compound, 1,2-bis(triethoxysilyl)ethane, removed this effect [ 20 ]. The alternative hypothesis assuming a negative expansion coefficient for TiO 2 below 50 ℃ seems not plausible.…”

Section: Resultsmentioning

confidence: 99%

Changes in Optical Parameters of SiO2:TiO2 Films Obtained by Sol-Gel Method Observed as a Result of Thermal Treatment

2021

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The research focused on materials having potential applications in technology of planar evanescent wave sensors. Four samples of binary SiO2:TiO2 thin films having different titania content were manufactured through the sol-gel method and dip-coating technique on polished silicon substrates. The samples were subjected to repeated heating/cooling protocols. Simultaneously, their optical parameters were monitored by spectroscopic ellipsometry as they evolved under varying temperature. Subsequent analysis confirmed linear dependence of refractive index on titania content, at least in vis-NIR wavelengths, as well as a low value of the thermal expansion coefficient. It was shown that the thickness of SiO2:TiO2 films decreased as a result of annealing processes, which may be a consequence of reduced porosity.

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Section: Resultsmentioning

confidence: 99%