1) impedance resonance technique
弹性、介电、压电和机电耦合系数
1.
The full set of electromechanical properties was determined by using an impedance resonance technique, the Curie temperatur.
研究了四方相弛豫铁电单晶Pb(Mg1/3Nb2/3)O3-38%PbTiO3(PMNT62/38)的介温特性,并利用HP4192A阻抗分析仪测量了PMNT62/38单晶完整的一套弹性、介电、压电和机电耦合系数,为理论研究和器件设计提供了参考,其居里点Tc~174℃;压电应变常量d33~300pC/N;介电常数C33~734,ε11~4301;机电耦合因数k33~84。
2) coupled piezothermoelasticity
耦合压电热弹性
3) voltage coupling coefficient
电压耦合系数
4) piezoelectric coupling factors
压电耦合系数
1.
Micro acoustic wave theory was used to analyze the propagation mechanism of LFE bulk acoustic waves and to calculate the piezoelectric coupling factors for arbitrary cut orientations and lateral field directions in quartz.
该文基于微声波理论,分析了横向场激励模式压电体声波器件的声传播机理,计算了石英晶体在任意切型及横向电场方向上的压电耦合系数,并根据计算结果设计了新型的传感器结构。
5) electromechanical coupling coefficient
机电耦合系数
1.
0?kV/mm,20?min and 80?℃,respectively,the piezoelectric constant d_(33),the relative dielectric constant ε_r and the electromechanical coupling coefficient K_p and K_t of the composites all increased with the increase of PLN content.
结果表明,在极化工艺参数为:极化电场强度为5 kV/mm;极化时间为20 min;极化温度为80℃的条件下,以硫铝酸钡钙水泥矿物作为基体的压电复合材料的相对介电常数rε和压电应变常数d33随着PLN质量含量的增加非线性增长,其值接近立方体模型理论值,随着PLN质量含量的增加,平面和厚度伸缩机电耦合系数Kp、Kt增大。
2.
The results show that the piezoelectric voltage factor g_(33) decreases nonlinearly with the volume fraction of the piezoelectric ceramic phase increasing,but piezoelectric strain factor d_(33),dielectric constant and electromechanical coupling coefficient K_p and K_t increase.
平面和厚度机电耦合系数Kp和Kt及介电常数εr随PMN体积分数的增大而增大,在低频段和高频段,其介电常数随频率的变化较平稳,表现出良好的介电频率稳定性。
3.
Crystal orientation dependence of piezoelectric modulus d33 and electromechanical coupling coefficient k33 have been calculated phenomenologically.
探讨了LBO晶体纵向压电系数d33及机电耦合系数k33随空间方向变化的规律,分别得到了LBO晶体压电系数d33及机电耦合系数k33的最大值及其方向,并与Li2B4O7进行了比较。
6) electromechanical coupling factor
机电耦合系数
1.
The easier coupling of the thickness fundamental resonance with the higher overtone of low-resonant modes leads to a bad measurement accuracy of the thickness series resonance frequencies or a failure of the resonance frequency measurement,resulting in deteriorating the accuracy and the identity of the electromechanical coupling factor determined by the traditional overtone ratio method.
压电振子低频振动模式的高次泛音易与厚度振动模式的基频相耦合,导致厚度振动的基音串联谐振频率不能精确测量(或无法测量),造成传统泛音比法测定压电振子的机电耦合系数的精度和一致性变差或无法进行测定。
2.
006, d33 = 243 pC/N)、high electromechanical coupling factor k33 (x = 0.
006时d33=243pC/N)、低的介质损耗(tanδ<2×10–2)、较高的机电耦合系数(x=0。
3.
The new piezoelectric crystal of LGS and it s characteristics are introduced simply in this paper, and the SAW properties of X -cuts, Y -cuts and Z -cuts of LGS are analyzed from theory, the results approved that LGS is a material with high electromechanical coupling factor and cuts of zero PFA and TCD.
简要介绍了硅酸钾镧(LGS)压电晶体及其性能,从理论上分析了其X切、Y切和Z切的声表面波(SAW)特性,证实了LGS具有机电耦合系数高且存在能流角和温度延时系数为零的切向等优点。
补充资料:纵向机电耦合系数
分子式:
CAS号:
性质:表示纵向:长度伸缩振子振动时,机械能与电能之间相互转换的能力,通常用K33表示。可用串联谐振频率fr,并联谐振频率fa和泊松比σE的函数表查得。也可由下式计算求得, 。当求得K33后就可作为大致判定该压电材料用于制造相应振动模式的器件是否适用。
CAS号:
性质:表示纵向:长度伸缩振子振动时,机械能与电能之间相互转换的能力,通常用K33表示。可用串联谐振频率fr,并联谐振频率fa和泊松比σE的函数表查得。也可由下式计算求得, 。当求得K33后就可作为大致判定该压电材料用于制造相应振动模式的器件是否适用。
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参考词条