Particle Size Analysis

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3.6 THERMAL CONDUCTIVITY MEASUREMENT

Measure the thermal conductivity of SiC off-set with the stable state law

The primary content is the necessity of measure the thermal conductivity. The brief conduction of common measuring method and the principles and guiding idea of measuring the thermal conductivity of silica gel with stable state law
3.6.1 The application of thermal conductivity
Thermal conductivity is one of important parameters that can reflect the heat Conduction performance of material. Both estimate the heat characteristic of material and the design application on the material need to know the thermal conductivity. The knitting underwear that can maintain warmth, the thermos, the refrigerator,
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By analyzing size of the silicon carbide using particle analyzer, so it is confirmed that milled SiC is a nanoparticulate having the average size of 117d.nm with intensity of 100%.

Performing a particle size analysis is the best way to answer the question: What size are those particles? Once the analysis is complete the user has a variety of approaches for reporting the result.
A better approach is to report both a central point of the distribution along with one or more values to describe the width of distribution.
5.2.4 Thermal conductivity test
Thermal conductivity is used to calculate the heat transfer in a fluid. By adding nanoparticle to the 1D-dilute water, thermal conductivity of the fluid increases rapidly with the proportional to the % wt of a nanoparticle, according to the usage of the fluids.

6. RESULTS AND
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It is confirmed that the SiC nanoparticulate would increase the thermal conductivity of the material when it is combined other conductive material.
2. It is confirmed that by analyzing from various results of particle size analyser, FE-SEM, HR-TEM, FT-IR, Thermal conductivity test.
3. From PSA test it is clear that the SiC particles milled by ball milling machine having the nanoparticulate size which has the average size of 117 d.nm.
4. From TEM results, it is confirmed that nanoparticulated SiC has in crystalline spherical structure with sharp edges are observed.
5. From the SEM result it has spherical shape and it has slightly changes in its size and shape due to its agglomeration.
6. To know whether any changes in the chemical reaction in the process FT-IR spectroscopy test is used. 1D distilled water is mixed with nanoparticulated SiC, it only increases the frequency and not in chemical reaction.
7. Finally, to know the thermal conductivity of the nanoparticulate SiC, the Heat conduction is constantly increases.

7 Reference

1 D.R. Paul - Feature Article Polymer nanotechnology: Nanocomposites -Elsevier Ltd - 2012
2 Houyem Abderrazak - Silicon Carbide: Synthesis and Properties – intechopen

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