- 专利标题: Processing method for grain-oriented lead-free piezoelectric Na0.5Bi0.5TiO3—BaTiO3 ceramics exhibiting giant performance
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申请号: US14068687申请日: 2013-10-31
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公开(公告)号: US09773967B2公开(公告)日: 2017-09-26
- 发明人: Deepam Maurya , Shashank Priya
- 申请人: Virginia Tech Intellectual Properties, Inc.
- 申请人地址: US VA Blacksburg
- 专利权人: Virginia Tech Intellectual Properties, Inc.
- 当前专利权人: Virginia Tech Intellectual Properties, Inc.
- 当前专利权人地址: US VA Blacksburg
- 代理机构: NRV IP Law, PC
- 代理商 Michele L. Mayberry
- 主分类号: H01L41/20
- IPC分类号: H01L41/20 ; H01L41/047 ; H01L41/16 ; H01L41/187 ; C04B35/462 ; C04B35/475 ; H01L41/43 ; H01L41/083
摘要:
Textured ceramic compositions having improved piezoelectric characteristics as compared with their random counterparts are provided. Methods of making the compositions and devices using them are also included. More particularly, compositions comprising textured ceramic Na0.5Bi0.5TiO3—BaTiO3(NBT-BT) materials synthesized from high aspect ratio NBT seeds exhibit improved characteristics, including an increased longitudinal piezoelectric constant (d33) and magnetoelectric coupling coefficient over randomly oriented NBT-BT. Additionally provided are compositions comprising of nanostructured Na0.5B0.5TiO3—BaTiO3 ferroelectric whiskers having a high aspect ratio. Nanostructured whiskers can be used to improve the piezoelectric properties of the bulk ceramics. The inventive materials are useful in microelectronic devices, with some finding particular application as multilayer actuators and transducers.
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