摘要
弛豫铁电单晶具有优越的压电性能和良好的温度适应性,在压电器件领域具有良好的应用前景。但是由于其复杂的工程化畴组态和各向异性,在器件设计过程中必须要考虑切型问题。该文从物联网电源的需求出发,以弛豫铁电单晶应用于振动能收集器为例,构造了以输出电压为考核目标的优化切型判据;利用基于欧拉旋转定理的张量计算方法计算分析了沿其赝立方结构的[001]、[011]和[111]极化的铌镁酸铅-钛酸铅单晶适用于振动能收集器的优化切型;分析了3种切型对切角误差的敏感性;最后给出了优化切型下的相关物理性能张量。
The relaxor ferroelectric single crystals have a good application prospects for the piezoelectric devices because of excellent piezoelectric properties and temperature adaptability.But the cutting orientation has to be considered before design and manufacture of the devices due to the engineered domain configurations and anisotropy.This paper discussed the selection criterion of crystal orientation regarding the output voltage of piezoelectric vibration energy harvester starting from the needs of power supply of the Internet of Things.By computation,the optimized crystal orientations with larger fault-tolerant regions were proposed for lead magnoniobate titanate single crystal poled along the pseudo-cubic[001]、[011]and[111]directions respectively.The sensitivity of these cutting orientation to the cutting angle error was analyzed.The relevant physical property tensors were given for the optimized crystal orientations.
出处
《压电与声光》
CSCD
北大核心
2017年第4期557-560,564,共5页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(51372197)
陕西省重点科技创新团队基金资助项目(2014KCT-04)
陕西省国际科技合作重点基金资助项目(2012KW-10)
关键词
弛豫铁电单晶
振动能收集器
切型
工程化畴
relaxor ferroelectric single crystals
vibration energy harvester
cutting orientation
engineered domain configurations
