Browsing by Author "Jiao Z."

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Bi12TiO20 crystallization in a Bi2O3-TiO2-SiO2-Nd2O3 system
    (2018-04-05) Slavov S.; Jiao Z.
    Polycrystalline mono-phase bismuth titanate was produced by free cooling from melts heated to 1170 °C. The control over the initial amounts in the starting compositions in the system Bi2O3/TiO2/SiO2/Nd2O3 and over the thermal gradient of the heat process resulted in the formation of specific structures and microstructures of monophase sillenite ceramics. The main phase Bi12TiO20 belongs to the amorphous network groups based on oxides of silicon, bismuth and titanium. In this work, we demonstrated a way to control the crystalline and amorphous phase formation in bulk poly-crystalline materials in the selected system.
  • No Thumbnail Available
    Item
    Glass-crystall materials containing Bi12Tio20 and Bi4Ti3O12 phases obtained from freelycooled melts of Bi2O3-Tio2-Sio2-Nd2O3 system
    (2018-01-01) Slavov S.; Jiao Z.
    Synthesis of selected samples of Bi2O3-TiO2-SiO2-Nd2O3 system was carried out on the ground of freely cooled melts in the range from 1450°C to 1100°C. The initial amount control of the start compositions provided the formation of polyphase glass-ceramics containing Bi12TiO20 and Bi4Ti3O12. The amorphous phases were based on oxides of silicon, bismuth, titanium and aluminum. The present investigation shows a way to control the crystalline and amorphous phase formation in bulk poly-crystalline materials on the ground of a selected system.