Amorphous to crystalline transition of magnesium silicate and silica nanoparticles

Details Amorphous to crystalline transition of magnesium silicate and silica nanoparticles Amorphous to crystalline transition of magnesium silicate and silica nanoparticles

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000esasp.456..347f&link_type=abstract

ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy. Eds. A. Salama, M.F.Kessler, K. Leech & B. Schulz. ESA-SP

Computer Science

Magnesium Silicate Smoke, Silica, Thermal Annealing

Scientific paper

Amorphous magnesium silicate and silica nanoparticles (smoke) have been transformed into the crystalline state by the process of thermal annealing. It has been shown that the magnesium silicate smoke evolves into crystalline forsterite (c- Mg2SiO4), tridymite (a crystalline modification of SiO2) and amorphous silica (a-SiO2) according to the initial Mg/Si-ratio of the smoke. Crystallization took place within a few hours for the Mg2SiO4 smoke and within one day for the MgSiO3 smoke. Amorphous silica nanoparticles have been annealed at 1220 K and are characterized by distinctly lower rates of thermal evolution compared to the magnesium silicates. Silica changed into cristobalite and tridymite.

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