Investigation of physicochemical transformation at mechanochemical, hydrothermal and microwave treatment of barium titanyloxalate

Synthesis of submicron BaTiO3 particles by modified solid-state reaction method

“…Milling treatment could be a method for deagglomeration of the BaTiO 3 powder obtained from solid-state reaction; however, a leach of barium ions into the aqueous suspension often occurs and results in stoichiometric problem [7]. Several chemical routes such as oxalate, sol-gel and hydrothermal methods for synthesizing fine and weakly agglomerated BaTiO 3 powder have been proposed; nevertheless, these methods are relatively more expensive than solid-state reaction and the particle sizes obtained are generally smaller than 100 nm [8][9][10][11][12][13]. Buscaglia et al have synthesized BaTiO 3 particles by mixing BaCO 3 (∼1 m) with peroxy-Ti aqueous solution and obtained BaTiO 3 pure-phase via a calcination treatment at a temperature as low as 700 • C [14,15].…”

Mechanochemical synthesis of barium titanate and its photocatalytic properties

“…Thus photoactivity of strontium titanate in various processes of wastes neutralization was shown in works [4][5][6]. The photocatalytic properties of barium titanate (BT) used as traditional electroceramic material (for example, ferroelectric) and their relationships with dielectric parameters were described in papers [7][8][9][10][11]. In this work we present the properties of BT prepared from different raw materials by mechanochemical synthesis which permits to obtain BT powders with high specific surface area in mild conditions.…”