公开(公告)号：US06465937B1

公开(公告)日：2002-10-15

申请号：US09521167

申请日：2000-03-08

Applicant: Jie Chen ,  Rajesh Kumar Panda ,  Turuvekere R Gururaja ,  Heather Beck

Inventor： Jie Chen ,  Rajesh Kumar Panda ,  Turuvekere R Gururaja ,  Heather Beck

IPC: H01L4104

CPC classification number: H01L41/1875 ,  H01L41/18

Abstract: This invention is directed to a transducer comprising a lead-based single crystal wherein the crystal is diagonally oriented and has an effective coupling constant of at least 0.70. In one embodiment, the lead-based crystal has the formula Pb(B′B″)O3—PbTiO3 wherein B′ is Mg2+, Zn2+, Ni2+ or Sc3+ and B″ is Nb5+, Ta5+ or W6+. Preferably, the lead-based crystal has of the formula Pb(B′B″)O3—PbTiO3 where B′ is Mg2+, Zn2+, Sc3+ and B″ is Nb5+ or more specifically Pb(Mg1/3Nb2/3)O3—PbTiO3 (“PMN—PT”), Pb(Zn1/3Nb2/3)O3—PbTiO3 (“PZN—PT”), and Pb(Sc1/3Nb2/3)O3—PbTiO3 (“PSN—PT”). The invention also includes a transducer comprising a plurality of lead-based single crystal transducers. In one embodiment the ultrasonic probe comprising one or more piezoelectric components having surfaces that function as transmitting and/or receiving elements; and electrodes placed upon opposite surfaces of the elements, and wherein each lead based piezoelectric component as described above. In addition, the invention includes improved materials for reduced spurious modes. Furthermore, the invention includes diagonally oriented lead-based transducers.

Abstract translation: 本发明涉及一种包含铅基单晶的换能器，其中晶体是对角线取向的，并且具有至少0.70的有效耦合常数。 在一个实施方案中，铅基晶体具有式Pb（B'B“）O3-PbTiO3，其中B'是Mg2 +，Zn2 +，Ni2 +或Sc3 +，B”是Nb5 +，Ta5 +或W6 +。 优选地，铅基晶体具有式Pb（B'B“）O3-PbTiO3，其中B'是Mg2 +，Zn2 +，Sc3 +和B”是Nb5 +或更具体的是Pb（Mg1 / 3Nb2 / 3）O3- PbTiO3（“PMN-PT”），Pb（Zn1 / 3Nb2 / 3）O3-PbTiO3（“PZN-PT”）和Pb（Sc1 / 3Nb2 / 3）O3-PbTiO3（“PSN-PT” 还包括包括多个基于铅的单晶振子的换能器。 在一个实施例中，超声波探头包括一个或多个具有用作发射和/或接收元件的表面的压电元件; 以及设置在元件的相对表面上的电极，并且其中每个基于铅的压电元件如上所述。 此外，本发明包括用于减少杂散模式的改进材料。 此外，本发明包括对角定向的基于铅的换能器。

公开(公告)号：US5796207A

公开(公告)日：1998-08-18

申请号：US847901

申请日：1997-04-28

Applicant: Ahmad Safari ,  Stephen C. Danforth ,  Amit Bandyopadhyay ,  Victor F. Janas ,  Rajesh Kumar Panda

Inventor： Ahmad Safari ,  Stephen C. Danforth ,  Amit Bandyopadhyay ,  Victor F. Janas ,  Rajesh Kumar Panda

IPC: H01L41/18 ,  H01L41/08

CPC classification number: H01L41/18 ,  H01L41/183

Abstract: This invention relates to novel oriented piezoelectric ceramic and ceramic/polymer composites. More particularly, it provides a novel piezoelectric composite design wherein the ceramic piezoelectric phase is oriented at an angle with respect to the direction of applied stress, thus giving improved electromechanical properties.

Abstract translation: 本发明涉及新型取向压电陶瓷和陶瓷/聚合物复合材料。 更具体地，它提供了一种新颖的压电复合材料设计，其中陶瓷压电相位相对于所施加的应力方向成一定角度定向，从而提供改善的机电性能。