Induced crystallization and physical properties of Li2O–CaF2–P2O5:TiO2 glass system

Electrical properties and microstructural characteristics of nonstoichiometric CaCu3xTi4O12 ceramics

“…The grain semiconductivity is attributable to point defects, such as cation vacancies and oxygen vacancies [19][20][21]. In comparison with stoichiometric (CCTO-3), those ceramics with copper excess (CCTO-4 and CCTO-5) have less Cu vacancies inside the grains and less oxygen vacancies because of the thicker segregated CuO layers along the grain boundaries, thereby show higher R b .…”

Influence of Ag2O on some physical properties of LiF–TiO2–P2O5 glass system

“…Among various such metal oxides, TiO 2 is expected to be more effective in improving the chemical durability of the phosphate glasses. Normally, the ions of titanium, exist in the glass in Ti 4+ state and participate in the glass network forming with TiO 4 , TiO 6 and some times with TiO 5 (comprising of trigonal bipyramids) structural units [11,12]. However, there are reports suggesting that these ions may also exist in Ti 3+ valence state in some of the glass matrices [13,14].…”

Facile hydrothermal synthesis and characteristics of B-doped TiO2 hybrid hollow microspheres with higher photo-catalytic activity

“…8 shows the IR spectra of B modified and unmodified samples in the range 4000-500 cm −1 . The spectra around the 650 cm −1 , which are assigned to the vibrations of the Ti-O bonds in the deformed octahedra of anatase titania, exhibit distinct expansion of band regions [25,47]. The bands at 3423 cm −1 and 1630 cm −1 correspond to the surface adsorbed water and hydroxyl groups [31].…”