Refractory oxides containing barium

Characterization of Products Obtained during Formation of Barium Monoaluminate through Hydrothermal Precipitation–Calcination Route

“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] A majority of the processes include ceramic syntheses involving high-temperature calcination of either a mixture of Al(OH) 3 and BaCO 3 2-7 or the mixture of aluminum and barium oxides. 8 BaAl 2 O 4 is also obtained as an intermediate product during the synthesis of barium hexaaluminate (BaO⅐6Al 2 O 3 ) 9 -12 and by a combustion synthesis using barium and aluminum salts with urea. 13 The conventional powder-blending techniques cannot achieve fine scale mixing of the reagents required for producing ultrafine products with good morphology.…”

“…19 Hydrothermal techniques in general produce products of desired homogeneity, as in the case of several other ceramics. 20,21 Although various methods of preparation of BaO⅐Al 2 O 3 , including high-temperature reaction methods, [2][3][4][5][6][7][8] wet-chemical synthesis, 19 and sol-gel methods, 14 -18 are well documented, no hydrothermal synthesis of barium aluminates appears to have been attempted.…”

Crystal structure of Ba8[Al3O10][AlO4], a novel mixed-anion Ba aluminate related to kilchoanite

“…DOUBLE oxides containing Ba and Al are of interest in both materials science and mineralogy because of their uses as possible engineering ceramics (Chen and Davies, 1997) or in refractory composites (Davies et al, 1996;Davies et al, 1997). The phase relationships in the BaO Al 2 O 3 system have been studied by Kovba et al (1987) and Appendino (1972).…”