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Abstract
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Article Information:
Adopting Microwave Techniques to Analyze Raw Quartz and Clay Materials in Uganda
E.R.R. Mucunguzi-Rugwebe
Corresponding Author: E.R.R. Mucunguzi-Rugwebe
Submitted: April 12, 2011
Accepted: September 25, 2011
Published: May 15, 2012 |
Abstract:
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An investigation was made into dielectric properties of quartz crystals, brown-clay, grey-clay,
whitish-clay and some rocks found in Uganda under temperatures of about 25ºC and pressure of approximately
66.0 cm of mercury. This study was conducted at Makerere University in Uganda some time back and revisited
in 2009. The analysed materials were provided by the Department of Geology Entebbe, Ministry of Survey and
Natural Resources Uganda. Measurements were carried out in the frequency range of 8.2-12.4 GHz, using
circular cavities energized in the TM01n family of modes; the signal frequency had no effect on, n, as this was
not in the axis of propagation. The relation D = cxn / (πfc √∈r) was used to calculate the dielectric constant ∈r
for cut-off frequency fc, xn is the nth root of the first kind of the Bessel function J1(x) = 0 and c is the velocity
of light. The study revealed that in Uganda there are: (i) crystals of dielectric constant 0r in the range ∈r = 4.48 -
4.57 and these values of ∈r are close to that of Piezo-electric crystal whose ∈r = 4.6, (ii) clays and black rock
whose dielectric constants ∈r = 1. The study revealed that when a raw material is put in a cavity its dielectric
constant can be determined by observing the resonance or (absorption frequency). Material with higher
dielectric constants had correspondingly lower frequency than those with lower dielectric constants.
Key words: Clay, microwave, quartz, materials, temperature, ,
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Cite this Reference:
E.R.R. Mucunguzi-Rugwebe, . Adopting Microwave Techniques to Analyze Raw Quartz and Clay Materials in Uganda. Research Journal of Applied Sciences, Engineering and Technology, (10): 1230-1236.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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