Piezoelektrisches Keramikmaterial

摘要

1,245,845. Piezoelectric ceramics. NIPPON ELECTRIC CO. Ltd. 4 Nov., 1969 [5 Nov., 1968], No. 53986/69. Heading CIJ. Piezoelectric ceramics have compositions defined by the formula wherein 0 < u < 1À00, y + z > O and x + y + z = 1 and suitably within the polygonal are shown in Fig. 4. Up to 25 atom per cent of the Pb can be replaced by Ba, Ca or Sr.