Investigation in to novel piezoelectric materials and manufacturing methods for sonar transducers

声纳换能器新型压电材料及制造方法研究

• 批准号: 1695537
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1695537
• 关键词: Investigation; novel; piezoelectric; materials; manufacturing

The overall objectives are aimed at using new piezoelectric materials and fabrication methods to enhance high power sonar over a wide frequency band.Ultrasonic transducers typically comprise active piezoelectric materials couples with a number of ancillary passive materials to control the mode of vibration and provide acoustic matching to the load and damping at the rear face.The project is two-fold; in order to address the active component within a sonar transducer design textured versions of the Single-Crystal PMN-28PT are key to achieving improved properties by mechanically aligning the jumbled crystal domains rather than align them through natural crystal growth which is far more expensive process. This gives 'k33' and 'k31' mode couplings for the Textured form of PMN-28PT, relative power density and relative at a fraction of the cost per volume when compared to the equivalent Single-crystal material. Repeatable scaling of laboratory process is yet to be achieved, but combining the well-known commercial tape casting process with templated grain growth (TGG) enables the production of high-performance flat plates and cylindrical shapes at a fraction of the cost of a single crystal. Textured material promises to be a significant part of the unfolding piezoelectric ceramic technology revolution.The problem space for the passive components of the design will be explored using additive manufacturing technique that are common in contemporary rapid prototyping techniques such as laser sintering and 3D printing. This will allow passive component designs to move away from cylindrical or rectilinear morphologies that are common in subtractive manufacturing and allow for more esoteric design strategy

总的目标是使用新的压电材料和制造方法来增强高功率声纳在较宽的频率范围内。超声波换能器通常由有源压电材料与一些辅助被动材料组成，以控制振动模式并提供声学匹配，以后面的负载和阻尼。该项目是双重的；为了解决声纳换能器内的有源组件，设计纹理版本的单晶PMN-28PT是通过机械对齐杂乱的晶域来实现性能改善的关键，而不是通过自然晶体生长来对齐它们，后者的过程成本要高得多。这为织构形式的PMN-28PT提供了‘k33’和‘k31’模耦合，与同等的单晶材料相比，相对功率密度和相对成本仅为单位体积成本的一小部分。实验室工艺的可重复规模化尚未实现，但将著名的商业流延工艺与模板化颗粒生长(TGG)相结合，能够以单晶成本的一小部分生产高性能平板和圆柱形。纹理材料有望成为正在展开的压电陶瓷技术革命的重要组成部分。设计中的被动元件将使用当代快速成型技术中常见的添加制造技术来探索问题空间，如激光烧结和3D打印。这将允许无源元件设计摆脱减法制造中常见的圆柱或直线形态，并允许采用更深奥的设计策略