METHOD FOR OBTAINING BARIUM-CALCIUM ZIRCONATE-TITANATE POWDER FOR ADDITIVE MANUFACTURING Russian patent published in 2023 - IPC C04B35/468 C04B35/49 B33Y70/00 C04B35/626 

FIELD: additive manufacturing technologies.

SUBSTANCE: invention is related to the field of obtaining ceramic powders of barium-calcium zirconate-titanate, which can be used in additive manufacturing technologies for manufacturing of ferroelectric lead-free materials and products based on them. The method for producing barium-calcium zirconate-titanate powder for additive manufacturing includes the steps of mixing the initial powders of barium carbonate BaCO₃, calcium carbonate CaCO₃ and nanopowders of titanium dioxide TiO₂ and zirconium dioxide ZrO₂ in an attritor for 3 hours, while isopropyl alcohol is added to ratio of 1:1 to the total mass of the initial powders with grinding balls of zirconium dioxide in a mass ratio of 10:1 to the total mass of the initial powders. Next, the powder mixture is dried, and then solid-phase synthesis of the barium-calcium zirconate-titanate compound is carried out by heating and holding for at least 2 hours in a muffle furnace in air at a temperature of 1000°C. The synthesized barium calcium zirconate titanate powder is subjected to agglomeration sintering to coarsen the particles and further classified into a powder with a particle distribution of 20 to 100 mcm. Then it is processed in a low-temperature plasma jet generated by a plasma torch with a power of 15 kW, using an argon-hydrogen mixture with an argon flow rate of 2.1 m³/h and a hydrogen flow rate of 0.21 m³/h, the pressure in the chamber is set to 1 atm, the powder flow rate is set to 16 g/min.

EFFECT: proposed method provides for production of barium-calcium zirconate-titanate powder, which has a spherical particle shape, good fluidity and high bulk density, which makes it possible to use the powder in additive manufacturing technologies.

3 cl, 2 dwg, 1 ex