Precipitation of SnO2 nano-crystallites from Na2O/B2O3/SnO2/(Al2O3) glasses

Transparent Nano Crystalline Glass‐Ceramics by Interface Controlled Crystallization

“…Nanocrystallinity in glass-ceramics has been reported predominantly for metal fluoride containing glass-ceramics, for example glasses containing alkaline earth fluorides, [19][20][21][22][25][26][27][28][29][30][31] PbF 2 ·YbF 3 solid solutions, 5,32,33 rare earth fluorides [34][35][36][37] or alkali rare earth fluorides, [38][39][40] also doped with other rare earth elements. Furthermore, the crystallization of lithium niobate, 41,42 oxidic semiconductors, such as tin oxide 14 or indium oxide 15,16 as well as that of magnetic materials such as magnetite, 12,13 have been reported. In some systems, such as the MgO/Al 2 O 3 /SiO 2 - [41][42][43][44][45][46][47][48] and the Li 2 O/ Al 2 O 3 /SiO 2 -systems, [49][50][51][52][53] the crystallization of high volume concentrations of nanocrystalline oxide phases is possible.…”

“…For higher energy densities, however, the much higher thermal conductivity of a glass‐ceramic material in which the phosphor is directly crystallized from glass is highly advantageous . Another important field is the preparation of ferrites or semiconducting nano‐sized powders from borate glasses. Here, in a first step, the aimed phase is crystallized from a glass of tailored composition and in a second step, the glass is dissolved in water or acid and finally, a nanocrystalline powder is obtained, which usually exhibits a narrower particle size distribution than powders produced by other methods .…”

Influence of heat-treatment schedule on crystallization and microstructure of bauxite tailing glass–ceramics coated on tiles

“…From Fig. 3b, needlelike wollastonite grains can be seen clearly, which was often observed in glass-ceramics (Xiang et al, 2007;Garkova et al, 2005;Höland et al, 1999). The Vickers' hardness of the disk is 5.1 GPa and bending strength is 83.7 MPa.…”

Sputtered Indium Tin Oxide Films for Optoelectronic Applications

“…Nevertheless, some reported results [19,20] show that the presence of a large amount of alkali ions (Na + , K + ) in the soda-lime glass substrates is dangerous for the ITO film parameters if high deposition or annealing temperatures are used in the fabrication process. This is due to the out-diffusion of ions from the substrate into the ITO film, leading to the possible formation of secondary phases such as Na 2 SnO 3 or Na 2 Sn 2 O 5 observed in SEM images [21]. These disadvantages from known published results were minimized by intercalating a barrier of TiO 2 -SiO 2 composite films [19], or SiO 2 and Al 2 O 3 films [20] between the ITO film and the soda-lime glass substrate.…”