Synthesis of Si(C, N) nanoparticles by rapid laser polycondensation/crosslinking reactions of an organosilazane precursor
| Autor: | Peter R. Strutt, Kenneth E. Gonsalves, Tongsan D. Xiao, Paul G. Klemens |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Materials science
Mechanical Engineering Condensation Evaporation Analytical chemistry Nanoparticle Laser Thermal conduction law.invention Differential scanning calorimetry Mechanics of Materials law visual_art visual_art.visual_art_medium General Materials Science Ceramic Particle size Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Journal of Materials Science. 27:3231-3238 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/bf01116018 |
| Popis: | A study has been made of basic mechanisms involved in the rapid synthesis of pre-ceramic and ceramic nanoparticle powders. In this process an aerosol, formed from an ultrasonically atomized liquid organosilazane monomer, [CH3SiHNH] n , is injected into the beam of an industrial CW CO2 laser. One critical feature examined was the rapid condensation of molecular species from the laser plume, in a process involving three-dimensional crosslinking polycondensation reactions. In accompanying studies, a model has been formulated to determine the laser plume temperature, the cooling rate of condensing species and the particle diameter. These are obtained by analytical solution of heat conduction, momentum and mass conservation equations that consider heat loss by gas conduction, radiation, evaporation and convection. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink