Thermal Stability and Microstructure of Glasses and Glass-Ceramics in the System La2O3-PbO-MnO-B2O3

Elena Kashchieva; Nikolai Dulguerov; Anna Staneva; Yanko B. Dimitriev

doi:10.4028/www.scientific.net/AMR.39-40.177

Paper Titles

Raman Spectroscopic and DTA Studies of TeO₂-ZnO-Na₂O Tellurite Glasses
p.159

Stress Strain Testing of the Strand of E-Glass Fibers
p.165

Basicity-Gibbs Free Energy Relationships for Binary Alkali Silicates
p.169

Structure and Properties of Selected Zirconia Silicate Glasses
p.173

Thermal Stability and Microstructure of Glasses and Glass-Ceramics in the System La₂O₃-PbO-MnO-B₂O₃
p.177

Study of Lithium-Lead Phosphate and Borophosphate Glasses
p.181

Some Physical Properties of Li₂O-TiO₂-TeO₂ and BaO-TiO₂-TeO₂ Glasses
p.185

Y₂O₃ – Al₂O₃ Binary Glass Microspheres: Synthesis and Characterisation
p.189

Correlation of Surface Characteristics and Thermal Conductivity of High Silica Glass Fibre Materials
p.193

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Thermal Stability and Microstructure of Glasses and Glass-Ceramics in the System La₂O₃-PbO-MnO-B₂O₃

Abstract:

Glasses have been synthesized in the system La2O3-PbO-MnO-B2O3 varying the MnOcontent in large compositional range between 10 and 70 mol%. Glass-ceramics containing La0,6Pb0,4MnO3 phase have been obtained directly by melt quenching method. Transition and crystallization temperatures have been determined by DTA. The increasing of the B2O3-content improves the thermal stability of the glasses. By TEM analysis, different type microheterogeneous structures have been observed in compositions rich in B2O3.