DEVELOPMENT OF NOVEL TRANSDUCER MATERIALS

新型传感器材料的开发

• 批准号: 6206556
• 负责人: THOMAS R SHROUT
• 金额: $ 13.9万
• 依托单位: PENNSYLVANIA STATE UNIVERSITY, THE
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6206556
• 关键词: bioengineering /biomedical engineering; bioimaging /biomedical imaging; biomedical resource; cardiovascular system; eye; medical rehabilitation related tag; prosthesis; skin; technology /technique; ultrasonography

Conventional piezoelectric materials such as PZT-5H for transducer may not be suitable for VHF transducer and array fabrication. Moreover, better piezoelectric materials with higher coupling coefficient and variable dielectric constant allowing for wider bandwidth and more flexible transducer design are needed for the improvement of conventional linear array performance as well as the development of multidimensional arrays. In this project, fine grain PZT which has smaller grain size and single crystal relaxor materials such as PZN-PT which has a much higher coupling coefficient than PZT-5H will be prepared and improved for VHF linear array fabrication. In addition 1-3 fiber composites prepared via a sol-gel process will be developed for VHF single element transducers. The potential of these materials has been demonstrated by the better performance in bandwidth and sensitivity of ultrasonic transducers prepared from these materials in comparison to those prepared from PZT-5H under similar conditions.

常规的压电材料，例如用于传感器的PZT-5H 可能不适合VHF传感器和阵列制造。 此外，更好的压电材料具有更高的耦合 系数和可变的介电常数，允许更宽 需要带宽和更灵活的传感器设计 改进常规线性阵列性能以及 多维阵列的开发。 在这个项目中，细谷物 PZT具有较小的晶粒尺寸和单晶松弛材料 例如PZN-PT，其耦合系数比 将准备PZT-5H，并改进VHF线性阵列制造。 另外，通过溶胶 - 凝胶工艺制备的1-3个纤维复合材料将 为VHF单元换能器开发。 潜力 这些材料已经通过更好的性能来证明 从制备的超声传感器的带宽和灵敏度 与从PZT-5H制备的材料相比 类似条件。