Fractal Dimensions of Ceramic Particle Agglomerates
Measured Using Polarized Light Scattering
Various ceramic particles were suspended in different non-absorbing
solvents such as water and isopropanol. Sonication and surfactants were used to promote
dispersion. Results from polarized light scattering measurements on these samples are
shown in Figure 1 and Table 1. Slopes of different curves in the figure yield the fractal
dimension of corresponding agglomerates. S11-S12 is the light scattered by the
agglomerates for a vertically polarized incident light and q is the scattering wave
vector.
Figure 1 - Fractal Dimensions of Ceramic Particle Agglomerates from Polarized Light
Scattering Measurements
| Material |
Refractive Index |
Dp |
N |
N (Range) |
Df |
Deff |
| SiO2 |
1.46 |
12 nm |
300 |
100-1600 |
1.6 |
80 nm |
| SiO2 |
1.46 |
12 nm |
250 |
100-1600 |
1.8 |
76 nm |
| ZrO |
2.40 |
50 nm |
130 |
25-400 |
1.8 |
253 nm |
Table 1 - Size Distribution Results for Fractal Agglomerates. Dp is the primary
sphere diameter, is the average number of primary spheres in the agglomerate, N is the
number of primary spheres, Df is the fractal dimension, and Deff is equivalent sphere size
for the agglomerate
|
