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A Spanish research group has developed a new method in order to obtain nanostructured particles (ceramic, metallic and composite) with improved functional and structural properties. Spray pryrolysis is a way in order to obtain nanostructured particles. Optimization of synthesis process allow us to synthesize materials with improved properties. The group is looking for technical cooperation with companies.
From the viewpoint of the application of the particles
for advanced materials synthesis, particle morphology and crystalline phases are of great interest.
In order to obtain nano-structural materials with improved properties it is necessary to develop and
optimize new methods of synthesis. One of them is Spray pyrolysis, which permits the synthesis of
nanoparticles with different composition and stoichiometric ratio from different precursor
solutions.
In the Spray pyrolysis method, single drops generated by ultrasonic device from a
precursor solution are converted to nanoparticles in a low/intermediate temperature reactor. The
aerosol is carried out by the flowing gas stream into a high-temperature tubular flow reactor.
During the process, aerosol droplets undergo evaporation, drying and solute precipitation in a
single-step process caused by the mechanisms of heat and mass transfer inside the droplets and
between the droplets and surrounding gas.
Aerosol synthesis enables synthesis of various particle
morphologies, either as hollow or dense spheres. It is presumed that some particle morphology is
formed during the evaporation/drying stage that encountered processes of evaporation and diffusion
of both the solvent, and solute, changing in droplet temperature and crust formation. The
opportunities for the synthesis of spherical, non-aglomerated particles with uniformly distributed
components and phases are of special importance when considering materials for advanced
applications.
Innovative Aspects:
The synthesis by means of Spray pyrolysis permits to obtain
nanoparticles with high chemical, morphological and structural homogeneity in order to improve the
final properties. Consequently, spherical, solid or hollow, agglomerate-free, nanophased particles
and with narrow size distribution will be obtained through the mechanisms of primary nano- particles
coalescence, collision and sintering.
Since the stages of solid-phase precipitation, decomposition
and sintering occur in a dispersion phase at the level of several micrometer sized droplets, the
advantages of this process are good control of particle size, morphology, chemical and phase
composition by adjusting solution and process parameters. In addition, a high droplet/particle
heating rate and high surface reaction result in the formation of fine, spherical, homogeneous
polycrystalline particles with a nanoscale composite structure. Aerosol synthesis also enables
retaining of the solution stoichiometry and mixing level in the resulting powders that reflects in a
remarkable way on the homogeneity and properties of selected functional and structural materials.
Stage of Development
Development phase - Laboratory tested
Exploitation of RTD Results
National Programmes
IPR
Secret know-how
Company Details
Collaboration Type
- Adaptation to specific needs
- Joint further development
- Testing of new applications
- Type of partner sought: Industries or research organizations
- Specific area of activity of the partner: material manufacturer
- Task to be performed by the partner sought: companies that nowadays work with conventional materials and want to improve properties of system, changing conventional materials by nanostructured composite material with improved properties.
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