SBIR Phase II: Investigation of Ferroelectric Materials with Properties Optimized for Electron Emission

SBIR 第二阶段：研究具有优化电子发射特性的铁电材料

• 批准号: 0078556
• 负责人: Lek Len
• 金额: $ 39.99万
• 依托单位: FM TECHNOLOGIES INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0078556&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Investigation; Ferroelectric

This Small Business Innovation Research Phase II project was motivated by recent research demonstrating that ferroelectric cathodes using commercial ferroelectric materials that were optimized for transducer applications can produce current densities in excess of 30 Amperes per square centimeter at 500,000 Volts, and can sustain an emission pulse (at 50,000 Volts) for a time in excess of 2 microseconds. Under the Phase I project ferroelectric materials optimized for use as cathodes were fabricated and tested, and promising materials were identified for further testing and optimization. The objective of the Phase II project will be to demonstrate a ferroelectric material with emission characteristics and lifetime meeting industry-defined requirements for application as a cathode in a commercial electron tube. Phase II research willinclude cathode testing at 20,000 volts, 1 microsecond with hundreds of pulses per second, characterization of the electron beam produced by the ferroelectric cathode according to size, energy and emittance, and validation testing of the cathode at an electron tube manufacturer's facility under commercial operating conditions. It is anticipated that these tests will demonstrate the efficacy of the ferroelectric cathode materials developed under this project for use in commercial electron tubes.Cathodes are used in a wide variety of microwave tubes. Applications include radar, communications, radio and TV transmission, accelerators for medical, waste treatment, environmental and research applications.

小型企业创新研究第二阶段项目的动机是最近的一项研究表明，使用针对传感器应用而优化的商用铁电材料的铁电阴极在500,000伏特时可以产生每平方厘米超过30安培的电流密度，并且可以保持发射脉冲(50,000伏特)超过2微秒。在第一阶段项目中，优化了用作阴极的铁电材料的制备和测试，并确定了有希望的材料，以进行进一步的测试和优化。第二阶段项目的目标将是展示一种铁电材料，其发射特性和寿命满足行业定义的应用于商业电子管阴极的要求。第二阶段的研究将包括20,000伏、1微秒每秒数百个脉冲的阴极测试，根据尺寸、能量和发射度表征铁电阴极产生的电子束，以及在电子管制造商的设施中在商业运行条件下对阴极进行验证测试。预计这些测试将证明在该项目下开发的用于商业电子管的铁电阴极材料的有效性。阴极用于各种类型的微波管。应用包括雷达、通信、无线电和电视传输、医疗加速器、废物处理、环境和研究应用。