发明名称 |
PROCESS FOR MAKING A POROUS PIEZOELECTRIC MATERIAL AND MATERIAL MADE ACCORDING TO THE PROCESS |
摘要 |
<p>A piezoelectric ceramic powder is, together with a binder, processed to a granulate. This granulate is mixed with a pearl polymer to a mixture. The mixture is pressed to a suitable shape, and then in a first firing step the binder and the pearl polymer are fired out. Preferably the first firing process is followed by a second firing step for sintering. Thereafter mechanical fabrication may take place, to give the end product its shape. The firing out of the pearl polymer results in a porous piezoelectric ceramic, with which, when used in an ultrasonic transducer, a high transducer effectiveness, sharp ultrasonic pulses with little edge radiation as well as a good electric and acoustic adaptation can be achieved.</p> |
申请公布号 |
EP0171716(B1) |
申请公布日期 |
1992.01.08 |
申请号 |
EP19850109704 |
申请日期 |
1985.08.02 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
KAARMANN, HANS, DR.;LUBITZ, KARL, DR.;MOHAUPT, JUTTA;VOGT, MARTINA;WERSING, WOLFRAM |
分类号 |
C04B38/06;H01L41/37;H01L41/43 |
主分类号 |
C04B38/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|