Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture
Authors:
- J. Szerement,
- Hironobu Saito,
- Kahori Furuhata,
- Shin Yagihara,
- A. Szypłowska,
- Arkadiusz Lewandowski,
- M. Kafarski,
- A. Wilczek,
- Jacek Majcher,
- Aleksandra Woszczyk,
- W. Skierucha
Abstract
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.
- Record ID
- WUT45346f228f3f48a8a64da0db4af2aa5f
- Author
- Journal series
- Materials, ISSN 1996-1944
- Issue year
- 2020
- Vol
- 13
- No
- 8
- Pages
- 1 - 12
- Publication size in sheets
- 0.55
- Keywords in English
- seven-rod probe; dielectric properties; frequency-domain reflectometry; dielectric permittivity; moisture; salinity
- ASJC Classification
- DOI
- DOI:10.3390/ma13081968 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/13/8/1968 Opening in a new tab
- Language
- (en) English
- License
- File
-
- File: 1
- Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture, File materials-13-01968.pdf / 3 MB
- materials-13-01968.pdf
- publication date: 14-05-2020
- Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisture, File materials-13-01968.pdf / 3 MB
-
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 07-05-2022, ArticleFromJournal
- Publication indicators
- = 9; = 5; = 2; : 2017 = 1.285; : 2018 (2 years) = 2.972 - 2018 (5 years) =3.532
- Citation count
- 9
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT45346f228f3f48a8a64da0db4af2aa5f/
- URN
urn:pw-repo:WUT45346f228f3f48a8a64da0db4af2aa5f
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.