Next Article in Journal
Utilization of Fluidized Bed Combustion Fly Ash in the Design of Reuse Clay Soil in the Form of Self-Compacting Grouts
Previous Article in Journal
Effects of Surface Treatments of Glass Fiber-Reinforced Post on Bond Strength to Root Dentine: A Systematic Review
Open AccessArticle

Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture

1
Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
2
Department of Physics, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
3
Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland
4
Department of Electrical Engineering and Electrotechnologies, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(8), 1968; https://doi.org/10.3390/ma13081968
Received: 23 March 2020 / Revised: 16 April 2020 / Accepted: 20 April 2020 / Published: 23 April 2020
This paper presents dielectric measurements of talc, glass beads, and their mixtures under different moisture and salinity levels. The measurements were conducted using a prototype seven-rod probe (15 mm long central rod) connected to a single port of vector network analyzer. The samples were moistened with distilled water and KCl solutions in order to obtain six different moisture content levels. The complex dielectric permittivity was determined from vector network analyzer reflection-coefficient measurements based on the open-water-liquid calibration procedure. Next, the fitting of volumetric water content–real part of dielectric permittivity calibration curves was performed for each material at selected frequencies, and the obtained relations were compared with well-known calibration equations. Additionally, a salinity index for the tested materials was calculated. It was concluded that pure talc is not an optimal material for the calibration and verification of dielectric methods. The calibration curves obtained for glass beads and the mixtures of glass beads with talc gave results close to well-known reference calibration functions. Additionally, the addition of talc caused the data points to be less scattered. Moreover, the values of the salinity index for the tested materials were in a good agreement with literature data for sand. The obtained results indicated that glass beads with the addition of talc can be used as a reference material for the calibration and verification of dielectric methods and devices for soil moisture measurement. View Full-Text
Keywords: seven-rod probe; dielectric properties; frequency-domain reflectometry; dielectric permittivity; moisture; salinity seven-rod probe; dielectric properties; frequency-domain reflectometry; dielectric permittivity; moisture; salinity
Show Figures

Figure 1

MDPI and ACS Style

Szerement, J.; Saito, H.; Furuhata, K.; Yagihara, S.; Szypłowska, A.; Lewandowski, A.; Kafarski, M.; Wilczek, A.; Majcher, J.; Woszczyk, A.; Skierucha, W. Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture. Materials 2020, 13, 1968. https://doi.org/10.3390/ma13081968

AMA Style

Szerement J, Saito H, Furuhata K, Yagihara S, Szypłowska A, Lewandowski A, Kafarski M, Wilczek A, Majcher J, Woszczyk A, Skierucha W. Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture. Materials. 2020; 13(8):1968. https://doi.org/10.3390/ma13081968

Chicago/Turabian Style

Szerement, Justyna; Saito, Hironobu; Furuhata, Kahori; Yagihara, Shin; Szypłowska, Agnieszka; Lewandowski, Arkadiusz; Kafarski, Marcin; Wilczek, Andrzej; Majcher, Jacek; Woszczyk, Aleksandra; Skierucha, Wojciech. 2020. "Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture" Materials 13, no. 8: 1968. https://doi.org/10.3390/ma13081968

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop