METHOD OF PRODUCING CERAMIC PIEZOMATERIALS FROM NANO- OR ULTRADISPERSE POWDERED OXYGEN-OCTAHEDRAL TYPE PHASES Russian patent published in 2017 - IPC C04B35/472 C04B35/491 C04B35/626 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: invention relates to method of producing ceramic piezomaterials from nano- and ultradisperse powdered oxygen-octahedral type phases containing titanium ions (IV), niobium (V), zirconium (IV), tungsten (VI), zinc (II), nickel (II) and iron (III), cobalt (III) and other p- or d-elements in (B) position. The method of producing ceramic piezomaterials from nano- and / or ultradisperse powdered oxygen-octahedral type phases is characterized by the fact that the nano- and / or ultradisperse powdered oxygen-octahedral type phases are treated with alcoholic or aqueous-alcoholic solution of 1-8 wt % ammonium glycolate (NH₄HC₂O₃) or ammonium formate (NH₄COOH), or their mixtures before molding and sintering operation, afterwards the liquid phase is removed and the resulting powder is dried. Press-half-finished product made from the thus treated powder is being sintered for 1.5-3 hours at a temperature from 900 to 1250°C.

EFFECT: invention increases the relative permittivity and piezoelectric modules while maintaining electromechanical coupling coefficients of piezomaterials.

6 cl, 30 ex, 2 tbl