The highly porous TiO2 material exhibited high specific surface area and porosity, narrow pore size distribution, homogeneity without cracks and pinholes, active anatase crystal phase, and small crystallite size.
The average particle size of the powders was about 10 15 μm and the size distribution was quite narrow due to the homogeneity of the metal carbonate, [Ni0.4Co0.2Mn(0.4−x Mgx]CO3 (x = 0, 0.04) precursors.
Once inhomogeneous deformation occurs during the development of the stress peak at the initial stages under high strain rates (5 × 10−3 2.2 × 10−2 s−1), the effective stress distribution within the workpiece becomes narrow and the deformation homogeneity is recovered in the ensuing steady state flow.
Limitations to our study included the relatively narrow variation across sites; homogeneity of care management practices throughout the integrated health care delivery system stems from multiple factors, including clustering of sites within operationally consistent regions.
Recent population-based data for Han children are also available, but in a narrower age range and homogeneity of ethnicity may limit generalization of results [ 17].
These heaters provide a good thermal homogeneity ensuring a narrow desorption peak and, thus, a good sensor response.
On the other hand, the synthesis of nanocrystalline ceramic materials imposes a challenge on the traditional solid state synthesis methods which fail to offer a sufficiently narrow size distribution and desired homogeneity at the nanometer level [22].
We use electro-thermal simulations to design thermal isolated membranes that supports thin film heaters as components of gas preconcentrators, these heaters provide a good thermal homogeneity ensuring a narrow desorption peak and improving in this way the sensors response.
The narrow age range increased the homogeneity of the sample, but provides data on important period around retirement.
