Study of the volume fraction, temperature, and pressure dependence of the resistivity in a ceramic-polymer composite using a general effective media theory equation

1991 ◽  
Vol 26 (21) ◽  
pp. 5899-5903 ◽  
Author(s):  
M. Blaszkiewicz ◽  
D. S. McLachlan ◽  
R. E. Newnham
Keyword(s):  
Polymer Composite ◽  
Pressure Dependence ◽  
Volume Fraction ◽  
Media Theory ◽  
Effective Media ◽  
Effective Media Theory ◽  
Theory Equation ◽  
Temperature And Pressure

scholarly journals Effective media theory with spatial correlation for flow in a fracture

1997 ◽  
Vol 102 (B10) ◽  
pp. 22587-22594 ◽  
Author(s):  
Joseph B. Walsh ◽  
Stephen R. Brown ◽  
William B. Durham
Keyword(s):  
Spatial Correlation ◽  
Media Theory ◽  
Effective Media ◽  
Effective Media Theory

A Study of the Volume Fraction, temperature and Pressure Dependence of the Resistivity in a Ceramic–Polymer Composite using a General Effective media Equation

1990 ◽  
Vol 195 ◽  
Author(s):  
David S. McLachlan ◽  
Michael Blaszkiewics ◽  
Shoko Yoshikawa ◽  
Robert E. Newnham
Keyword(s):  
Composite System ◽  
Volume Fraction ◽  
Positive Temperature Coefficient ◽  
Relative Volume ◽  
Uniaxial Pressure ◽  
Positive Temperature ◽  
Effective Media ◽  
Temperature Coefficient Of Resistivity ◽  
Temperature And Pressure ◽  
Morphology Parameters

ABSTRACTA General Effective Media (GEM) equation is used to quantitatively describe the resistivity of an Fe304-eccogel composite system as a function of the relative volume fractions. The two percolation morphology parameters (øc and t) characterise the microstructure. Preliminary models, also based on the GEM equation, are used to describe the positive temperature coefficient of resistivity (PTC) and the piezoresistivity (uniaxial pressure) of the composite when the composition is near the percolation threshold.

Permeability calculation in composite media with low filler concentration: A new method of effective media theory application

2009 ◽  
Vol 105 (7) ◽  
pp. 07A526 ◽  
Author(s):  
J. T. Jiang ◽  
L. Zhen ◽  
X. J. Wei ◽  
Y. X. Gong ◽  
W. Z. Shao ◽  
...  
Keyword(s):  
Media Theory ◽  
New Method ◽  
Filler Concentration ◽  
Composite Media ◽  
Effective Media ◽  
Effective Media Theory ◽  
Theory Application

Analysis of Thermal Conductivity of Lime Plaster with Pozzolanic Addition by Different Homogenization Techniques

2014 ◽  
Vol 982 ◽  
pp. 1-5
Author(s):  
Jan Fořt ◽  
Lukáš Fiala ◽  
Milena Pavlíková ◽  
Zbyšek Pavlík ◽  
Robert Černý
Keyword(s):  
Thermal Conductivity ◽  
Pulse Method ◽  
Measured Data ◽  
Media Theory ◽  
Practical Applications ◽  
Effective Media ◽  
Effective Media Theory ◽  
Lime Plaster ◽  
Water Saturated

Thermal conductivity of lime-pozzolan plaster is analyzed in the paper. At first, determination of basic physical properties of tested material is done for its basic characterization, as well as for the assessment of input parameters in the subsequent analysis of measured data by different homogenization techniques. The measurements of thermal conductivity are performed in dependence on moisture content from the dry state to the fully water saturated state using transient pulse method. Among the homogenization techniques based on effective media theory, Lichtenecker’s and Dobson’s models are used. The measured data presented in this paper can find utilization in practical applications of the studied plaster. The analyzed homogenization techniques are found to be applicable for a rapid evaluation of moisture dependent thermal conductivity.

High Permeability of Z-Type Ferrite Sheets Directional Array

2017 ◽  
Vol 898 ◽  
pp. 1645-1648
Author(s):  
Shi Bing Pan ◽  
Cheng Jun Zhang ◽  
Hai Kun Wu ◽  
Lei Qian ◽  
Ming Xun Yu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Permeability ◽  
Chemical Precipitation ◽  
Media Theory ◽  
Precipitation Method ◽  
Intrinsic Permeability ◽  
High Permeability ◽  
Effective Media ◽  
Specific Direction ◽  
Effective Media Theory

Z-type ferrite sheets were prepared by chemical precipitation method to investigate influences of directional arrays from the Z-type ferrite sheets on magnetic properties. The permeability of the ferrite directional arrays was obviously improved in the specific direction. Assuming that the intrinsic permeability of Z-type ferrite was existed, the magnetic permeability in array was calculated by the Maxwell-Garnett equation of effective media theory. The reason for the large difference between the theoretical calculation and measured value was also discussed.

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