PN II IDEI 532/ 2009

 

Theme:
Obtaining and characterization of physical and structural properties of some new glasses and glass ceramics doped with 3d and 4f ions with possible applications in electronics and telecommunication

 

    Project description:

    The development of modern technologies is based on, and is conditioned by the development of new materials with proper properties. The general purpose of the project proposal is to obtain and to characterize the physical and structural properties of some glasses and glass ceramics, in the way to identify some mechanical, optic, electric and magnetic properties able to recommend them for applications in electronics and telecommunications. Initially, these materials will be obtained in both, vitreous state (disorderly structure) and glass ceramic state (a mix of vitreous and crystalline phase). The obtained materials will be the subject of partial crystallization by heat treatment applied in order to obtain some crystalline compounds known to be responsible for some properties, and some new crystalline compounds (not existent in the data bases). To form crystalline compounds there will be used two methods: one in which these particles are formed in the time of materials preparation and after the particles are developing through supplementary heat treatments, and the second method in which the particles are developing following the heat treatment appliance. Glasses and glass ceramic materials will be completely characterized through TG/DTA, X-Ray diffraction, FTIR, RPE, magnetic susceptibility, dielectric constant, electric conductivity and density measurements, in order to identify some properties with applicative potential in electronics and telecommunications. For the new obtained polycrystalline materials it will be determined crystalline and molecular structure using X-Ray diffraction on powders combined with molecular modeling. The information obtained from experimental analyses will be used to investigate, through a mechanic-quantic model, the structural properties of these materials.

 

    Scientific objectives for the year 2009:

    • Documentation concerning the vitreous systems based on P2O5, B2O3, TeO2 and GeO2. Structure, properties and technological applications;
    • Obtaining of new vitreous and vitroceramic oxide systems with 3d and 4f ions;
    • Analyze of the vitreous oxide system structure from experimental obtained data and its characterization through a quantum mechanical model.