H ELECTRICITY
H10 SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
H10N ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
30/00 Piezoelectric or electrostrictive devices
H10N30/80 Constructional details
H10N30/85 Piezoelectric or electrostrictive active materials
H10N30/853 Ceramic compositions
H10N30/8536 Alkaline earth metal based oxides, e.g. barium titanates