专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

DE69022535D1 未知
公开(公告)号：DE69022535D1
公开(公告)日：1995-10-26
申请号：DE69022535
申请日：1990-11-01
申请人： SAKAI CHEMICAL INDUSTRY CO
发明人： OAKI MASASHI , FUKAI KIYOSHI , ABE KAZUNOBU , SAKATA KOICHIRO , TAKENAKA TADASHI
IPC分类号： H01L41/39 , H01L41/24
摘要： A multilayer piezoelectric composite comprising a bonded laminate each layer of which is composed of a green sheet of a low-temperature sintering lead zirconate titanate piezoelectric ceramic. The temperature coefficient of a frequency constant of at least one layer has a polarity opposite to the polarity of those of the other layers. The bonded laminate is sintered at a temperature which does not produce any or almost any interdiffusion between layers so that the absolute value of the temperatures coefficient of a frequency constant of the bonded laminate is smaller than the absolute value of the temperature coefficient of a frequency constant of any or one of the layers.

2. 发明专利

DE69022535T2 未知
公开(公告)号：DE69022535T2
公开(公告)日：1996-03-21
申请号：DE69022535
申请日：1990-11-01
申请人： SAKAI CHEMICAL INDUSTRY CO
发明人： OAKI MASASHI , FUKAI KIYOSHI , ABE KAZUNOBU , SAKATA KOICHIRO , TAKENAKA TADASHI
IPC分类号： H01L41/39 , H01L41/24
摘要： A multilayer piezoelectric composite comprising a bonded laminate each layer of which is composed of a green sheet of a low-temperature sintering lead zirconate titanate piezoelectric ceramic. The temperature coefficient of a frequency constant of at least one layer has a polarity opposite to the polarity of those of the other layers. The bonded laminate is sintered at a temperature which does not produce any or almost any interdiffusion between layers so that the absolute value of the temperatures coefficient of a frequency constant of the bonded laminate is smaller than the absolute value of the temperature coefficient of a frequency constant of any or one of the layers.

3. 发明专利

JPH03148186A LAMINATION TYPE COMPOSITE PIEZOELECTRIC BODY AND ITS MANUFACTURE 失效
公开(公告)号：JPH03148186A
公开(公告)日：1991-06-24
申请号：JP28662489
申请日：1989-11-02
申请人： SAKAI CHEMICAL INDUSTRY CO
发明人： AOKI MASASHI , FUKAI KIYOSHI , ABE KAZUMITSU , SAKATA KOICHIRO , TAKENAKA TADASHI
IPC分类号： H01L41/39
摘要： PURPOSE:To reduce temperature dependency by sintering a specific laminated bonded body at a temperature which does not cause mutual diffusion among layers and by making an absolute value of a temperature coefficient of a frequency constant thereof smaller than an absolute value of a temperature coefficient of a frequency constant of any or either of layers. CONSTITUTION:Each layer of a laminated bonded body is formed by a green sheet of low temperature sintering PZT (lead titanate zirconate which is a two-element solid solution of lead zirconate and lead titanate) piezoelectric ceramics which can be sintered causing no or little mutual diffusion among layers; and one layer thereof is formed by a green sheet of PZT piezoelectric ceramics whose positive and negative of a temperature coefficient of a frequency constant are different from positive and negative of a temperature coefficient of other layers. The laminated bonded body is sintered at a temperature which causes no or little mutual diffusion among layers. It is constituted so that an absolute value of a temperature coefficient of a frequency constant thereof is smaller than an absolute value of a temperature coefficient of a frequency constant of any or either of layers. Thereby, temperature dependency of piezoelectric body can be reduced.

4. 发明专利

JP2518703B2 失效
公开(公告)号：JP2518703B2
公开(公告)日：1996-07-31
申请号：JP28662489
申请日：1989-11-02
申请人： SAKAI CHEMICAL INDUSTRY CO
发明人： AOKI MASASHI , FUKAI KYOSHI , ABE KAZUMITSU , SAKATA KOICHIRO , TAKENAKA TADASHI
IPC分类号： H01L41/39 , H01L41/24

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式