A new type wide-frequency-range shear viscosity sensor using c-axis tilted ScAlN thin film on temperature stable AT-cut quartz thick plate

Yui Yamakawa, Ko Hei Sano, Rei Karasawa, Takahiko Yanagitani

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In order to study relaxation characteristics of viscoelasticity of the liquid, a wide frequency sweep in the range of MHz to GHz is desired. We, therefore, report a new type HBAR (High overtone Bulk Acoustic Resonator) sensor which makes it possible to operate in a wide frequency range. We choose AT-cut quartz as the substrate whose TCF is zero at room temperature to suppress frequency shifts due to the temperature change. TCF of the HBAR in air is measured to be -3.2 ppm/°C, which demonstrates the great improvement of TCF compared with single ScAlN films (-62 ppm/°C) due to the zero TCF AT-cut quartz substrate. In this study, frequency shifts and frequency peak attenuations were measured for various concentration of glycerin solutions to demonstrate usefulness of the HBAR viscosity measurement.

    Original languageEnglish
    Title of host publication2017 IEEE International Ultrasonics Symposium, IUS 2017
    PublisherIEEE Computer Society
    ISBN (Electronic)9781538633830
    DOIs
    Publication statusPublished - 2017 Oct 31
    Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
    Duration: 2017 Sep 62017 Sep 9

    Other

    Other2017 IEEE International Ultrasonics Symposium, IUS 2017
    CountryUnited States
    CityWashington
    Period17/9/617/9/9

    Keywords

    • AT-cut quartz crystal
    • Glycerin
    • HBAR
    • ScAlN films
    • Viscosity sensor

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

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  • Cite this

    Yamakawa, Y., Sano, K. H., Karasawa, R., & Yanagitani, T. (2017). A new type wide-frequency-range shear viscosity sensor using c-axis tilted ScAlN thin film on temperature stable AT-cut quartz thick plate. In 2017 IEEE International Ultrasonics Symposium, IUS 2017 [8092486] IEEE Computer Society. https://doi.org/10.1109/ULTSYM.2017.8092486