Glass formation, properties and structure of Y2O3Al2O3B2O3 glasses

Partitioning of gadolinium and its induced phase separation in sodium-aluminoborosilicate glasses

“…In this case, formation of Al ½4 -O-Al ½4 bonds in the borate-rich environment is not favorable based on the aluminum avoidance principle [55]. The principle appears to be applicable to alkali-aluminoborate glass [15,51,52]. However, it is not a hard principle; the amount of Al ½4 -O-Al ½4 linkage in aluminosilicate glasses was found to be dependent on specific network modifying cations or on the field strength of the cations [56,57] [46].…”

Characterization and improvement of LTCC composite materials for application at elevated temperatures

“…The crystallization products detected by X-ray analysis are lanthanum borate LaBO 3 , calcium aluminum borate CaAl 2 B 2 O 7 and lanthanum aluminum borate oxide LaAl 2.03 (B 4 O 10 )O 0.54 . 11,12 When stressing this LTCC material at 600 • C (case b), using a lower stressing and consecutive heating rate, the temperature of failure drops to 620 • C as can be seen in Fig. 2.…”

Characterization of the glass-to-vitroceramic transition in yttrium aluminum borate laser glasses using solid state NMR

“…By high-temperature annealing these glasses can be converted to vitroceramics, which offer the distinctive advantage of presenting higher emission cross-sections owing to the more ordered local crystalline environment. While the preparation conditions, the glass forming range, as well as some basic bulk and spectroscopic properties of Y 2 O 3 -Al 2 O 3 -B 2 O 3 glasses have been published [7][8][9][10][11] no corresponding structural description of the vitroceramics derived from them is as yet available. Owing to its element-selectivity, inherently quantitative character and its focus on the local environment, solid state nuclear magnetic resonance (NMR) is an ideal tool for structural investigation of vitroceramics, and numerous applications of single-and double resonance applications to glass ceramics can be found in the literature [12][13][14][15][16][17].…”