Dielectric measurements (40 Hz–110 MHz) conducted on samples of limestone and its associated rocks from Ewekoro, Eastern Dahomey Basin, Nigeria has yielded vital information for characterization.
The dielectric properties of nine rock samples [limestone (8) and sandstone (4)] collected from Ewekoro in Ogun State, Nigeria were studied in the range 10 kHz – 110 MHz under ambient ...
Semantic Scholar extracted view of "Experimental Study of the Effects of Wettability and Fluid Saturation on Nuclear Magnetic Resonance and Dielectric Measurements in Limestone" by Lalitha Venkataramanan et al.
DOI: 10.1080/14680629.2024.2331194 Corpus ID: 268603837; Determination of optimum limestone filler content in asphalt mastic by dielectric spectroscopy @article{Ulutas2024DeterminationOO, title={Determination of optimum limestone filler content in asphalt mastic by dielectric spectroscopy}, author={Kemal Turker Ulutas and …
Download Table | Chemical analysis of limestone from publication: Laboratory measurement of dielectric constant and loss tangent of Indian rock samples | The data on dielectric properties of ...
The dielectric constant is an important characteristic of limestone. It is significant in engineering applications and in the interpretation and recognition of remote sensing …
Dielectric properties of nanocrystalline CaCu3Ti4O12 (CCTO) ceramics fabricated from Algerian limestone raw material March 2023 Materials Chemistry and Physics 301((2023) 127558):15
Dielectric constant is a critical parameter for GPR surveys because it controls propagation velocity of electromagnetic waves through material, reflection coefficients …
Dielectric constant and loss factor of whole-wheat flour of 10.9% moisture at 11.67 GHz at 22 C as functions of the bulk density of the flour [24].
where ε r(s) is the relative dielectric permittivity of limestone (i.e., solid phase with specific values), ε r(a) and ε r(w) are the relative dielectric permittivity of air (1) and water (79.5) based on water temperature in the sample measured at 22.0°C in this case [Buchner et al., 1999], is the porosity, and S w is the water saturation ...
Rock - Electrical Properties: The electrical nature of a material is characterized by its conductivity (or, inversely, its resistivity) and its dielectric constant, and coefficients that indicate the rates of change of these with temperature, frequency at which measurement is made, and so on. For rocks with a range of chemical composition as …
(1996). Determining Dielectric Properties of Coal and Limestone by Measurements on Pulverized Samples. Journal of Microwave Power and Electromagnetic Energy: Vol. 31, No. 4, pp. 215-220.
Limestone is a type of common industrial natural stone. It has the highest tensile strength and the lowest thermal conductivity among natural stone materials. The graph bars on the material properties cards below compare limestone to other natural stone materials (top) and the entire database (bottom). ... Dielectric Strength …
Estimates for the permittivities of solid coal and limestone at 11.7 GHz and 20°C are obtained from measurements of the permittivities and bulk densities of pulverized samples and the particle material density. Linear regressions of the cube root of the dielectric constant on sample bulk density provide estimates of the dielectric constants of the …
The CRIM is a three phase dielectric mixing model that expresses the relative dielectric permittivity as: earðbÞ 5/Sw earðwÞ 1ð12/ÞearðsÞ 1/ð12Sw ÞearðaÞ (5) where er(s) is the relative dielectric permittivity of limestone (i.e., solid phase with specific values), er(a) and er(w) are the relative dielectric permittivity of air (1 ...
The standard deviations obtained for the limestone block and filler samples (0.0408 and 0.0191) and the corresponding mean values (7.370 and 3.648) demonstrate that the dispersion of the measured dielectric constants of the limestone block and filler samples in the frequency range from 300 MHz to 3 GHz is small, that is, the permittivity …
The results show that the dielectric constants of limestone, cement mortar and concrete increase with varying degrees when temperature rises.
Abstract: The relative complex dielectric function epsiv*(omega)=epsiv' - jepsiv" of pulverized samples of different grade limestone (cement grade, chemical grade, steel melting soap (SMS) grade and dolomite), coal (lignite) and limestone-coal mixtures (65 wt% + 35 wt%) were measured at 10.1 GHz over a range of bulk densities from loosely …
The dielectric constant (1 ′ ) of limestone was measured from 0.5 to 4.5 GHz in the recent study by Wang et al. (2020), giving values ranging from 8 to 8.5 at …
The dielectric constant is an important characteristic of limestone. It is significant in engineering applications and in the interpretation and recognition of remote sensing data.
The rheological and dielectric characteristics of asphalt mastics with different ratios of limestone filler were analyzed and compared with each other for road pavement applications. The dielectric properties of asphalt mastics are studied as a function of frequency (0,1–10 6 Hz) at different temperatures ((-)40°C−40°C). The glass ...
Furthermore, strong linear agreement between the dielectric constants of limestone, cement mortar and concrete and temperature is identified, indicating that the variations in the dielectric properties of concrete with temperature should be taken into consideration. Meanwhile, a temperature-dependent dielectric model of concrete is …
The pressure and temperature evolution of an intense dielectric relaxation mechanism in as-received and wetted limestone (from Ioannina region (Greece)) are studied experimentally through complex impedance spectroscopy.The relaxation time decreases on compression, yielding a negative value for the corresponding activation …
Water saturation influence on the complex dielectric permittivity ( = r--j im) of limestone in a frequency band, which is usually using by subsurface radars, was measured on the coaxial ...
Cuprous (I) oxide (Cu 2 O) was used instead of Cupric (II) oxide (CuO) for the synthesis of CCTO ceramic by solid-state reaction. The impact of sintering time on the structure stability, grain size, and dielectric performance of Cu 2 O-based CCTO ceramics was discussed. XRD analysis indicates that the CaCu 3 Ti 4 O 12 cubic phase was …
Dielectric constant in rocks and sediments is primarily a function of mineralogy, porosity, pore fluids, frequency, geometries, and electrochemical interactions between rock …
Dielectric measurements (40 Hz–110 MHz) conducted on samples of limestone and its associated rocks from Ewekoro, Eastern Dahomey Basin, Nigeria has yielded vital information for characterization.
The results indicate that the dielectric constants and loss factors of limestone, asphalt, and asphalt mixtures increase in various degrees with the increase of temperature. Approximately linear relationships between the dielectric constants and loss factors of limestone, asphalt, and asphalt mixtures and temperature are discerned.
The relative complex dielectric function epsiv*(omega)=epsiv' - jepsiv" of pulverized samples of different grade limestone (cement grade, chemical grade, steel melting soap (SMS) grade and ...
The limestone (Guelma, Algeria) has a hydrothermal geological formation, and is composed mainly of calcium carbonate (98.4%). This choice is justified by its natural abundance and consequently low price, besides of its high purity and thermal stability. ... The high dielectric loss tangent (tanδ) in CCTO is a critical problem that has been ...