发明名称 |
Halbleitender piezoelektrischer Keramikwandler und Verfahren zu seiner Herstellung |
摘要 |
1,219,983. Piezoelectric ceramics. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 14 March, 1968 [14 March, 1967; 23 March, 1967], No. 12461/68. Heading C1J. A semi-conductive piezoelectric ceramic has the formula x + y + z = 1 and has a resistivity not greater than 7 x 10<SP>8</SP> ohm./cm. NiO 0�3 to 1% b.w. can be present. The ceramic is obtained by heating an appropriate mixture of the oxides at 1100- 1300� C. for at least 10 mins in an O 2 deficient atmosphere exemplified by N 2 , Ar, H 2 and their mixtures. Prefiring at 850� C. can be included. Reference has been directed by the Comptroller to Specification 1,066,752. |
申请公布号 |
DE1646757(A1) |
申请公布日期 |
1971.09.09 |
申请号 |
DE19681646757 |
申请日期 |
1968.02.16 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. |
发明人 |
MATSUO,YOSHIHIRO;MATSUMOTO,HITOSHI;KUROKAWA,EISUKE;SASAKI,HIRMU;HAYAKAWA,SHIGERU |
分类号 |
C04B35/46;C04B35/48;C04B35/50;C04B35/51;H01B1/08;H01L41/39 |
主分类号 |
C04B35/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|