Glasses and their crystallization in the (1−х)KNbO3·хSiO2 system at low glass-forming oxide contents, 0⩽х⩽0.35

Photostimulated optical effects and some related features of CuO mixed Li2O–Nb2O5–ZrO2–SiO2 glass ceramics

“…Niobium silicate glasses and glass ceramics mixed with transition metal ions are well known due to their electro chromic and non-linear optical properties [1][2][3][4]. The addition of ZrO 2 to these glasses makes them to be more electrical, chemical and thermal resistant; the presence of zirconium oxide in oxide glasses also causes to increase the mechanical strength and is found to widen the range of transparency (300 nm to 8 mm) of the glasses [5][6][7].…”

Nano-heterogeneous structure of (1-x)KNbO3–xSiO2 glasses in the low glass-forming oxide content range 0.05 ≤ x ≤ 0.3

“…In the present work we study glasses of the compositions already described in the work [17]. The ultra pure K 2 CO 3 (99.8%), Nb 2 O 5 (99.997%), and amorphous SiO 2 (99.9%) compounds were used as initial reagents.…”

“…2). The detailed description of fabrication of amorphous KNS glasses with low SiO 2 using this setup is given elsewhere [17].…”

“…A more detailed description of SANS experiments on KNS glasses was previously reported [16]. Amorphous Table 1 Characteristic temperatures of the studied glasses obtained by DTA [17] and heat-treatment conditions. flakes with SiO 2 content less than 12 mol%, prepared by air-or nitrogencooling, were examined by scanning electronic microscopy (SEM) using JSM 7500 FA high resolution scanning electron microscope (JEOL, Japan) in a secondary electrons mode.…”

“…Recently Sigaev et al [17] obtained vitreous plates and amorphous powders of (1-x)KNbO 3 -xSiO 2 glasses with SiO 2 content varying from 0 to 35 mol%. Possessing high concentrations of niobium oxide these glasses may be promising for producing high χ (2) values by thermal poling.…”