PREPARATION OF NANOSTRUCTURED MATERIALS BASED ON BaZrO Russian patent published in 2023 - IPC C01F11/04 C01G25/02 C01F17/218 B82Y40/00 

FIELD: electronics; medicine.

SUBSTANCE: invention can be used in electronics, medicine and catalysis in the manufacture of solid electrolytes, piezoelectric actuators, high-temperature hydrogen sensors, luminescent materials, fuel cell membranes, as well as base substrates for producing single crystals of high-temperature superconductors. Nanostructured materials with a perovskite structure based on BaZrO₃ are produced using the sol-gel method. First, the following is prepared: aqueous solutions of barium nitrate Ba(NO₃)₂ and zirconyl ZrO(NO₃)₂ with glycine C₂H₅NO₂ taken in an amount of 2.22 mol for preparation of 1 mole of material. Additionally there may be Yttrium nitrate Y(NO₃)₃ introduced⋅6H₂O. These reagents are added to water sequentially and at equal intervals. Then the mixture is evaporated at temperatures not exceeding 350°C and continuous mixing until it becomes gel-like and ignites spontaneously. Next, heat treatment is carried out at 500–1,000°C for 30 minutes and the rate of temperature is increased and decreased to 5°S/min and 3°S/min respectively. Heat-treated powders are pressed at a pressure of at least 150 MPa and sintered at 950–1,000°C for 1÷10 hours. The resulting nanostructured materials with a perovskite structure contain at least 90% of the main stoichiometric phase, are characterized by an average crystallite size of 20–25 nm and a bulk density of 0.01–0.03 g/cm ³.

EFFECT: preparation of nanostructured materials based on BaZrO₃.

1 cl, 6 dwg, 2 ex