1) effective electromechanical coupling coefficient
有效机电耦合系数
1.
To find the optimal performance Unimorph transducer, based on the resonance frequency equation of thin disk flexural transducer with a simply supported boundary, the relations between the resonance frequency, the effective electromechanical coupling coefficient and size of the transducer have been calculated and analyzed, the optimum design of geometric parameters has been obtained.
为了寻求最佳性能的Unimorph换能器,本文根据简支边界下薄圆片弯曲换能器的共振频率方程,计算和分析了这种换能器的共振频率、有效机电耦合系数与换能器尺寸之间的关系,得出了设计换能器的最佳几何参数。
2.
The resonance frequency equations were derived, the effective electromechanical coupling coefficient wasmeasured and the radiating characteristics of the compound transducer were analyzed.
推出了恢复合振动系统的共振频率设计方程，分析了各个振动模式的机电转换特性及其声波辐射特性，测量了振动系统的共振频率及其有效机电耦合系数。
2) effective electromechanical coupling factor
有效机电耦合系数
1.
The change of the effective electromechanical coupling factor and mechanical quality factor due to silicon rubber which was dipping coated had been researched.
首先,利用硅胶对钹型换能器进行了灌封,研究了灌封对换能器的等效压电应变常数d_(33)~(eff)、有效机电耦合系数和机械品质因数的影响,硅胶的束缚使机械品质因数下降,并且解释了换能器在灌封后有效机电耦合系数升高的原因。
3) effective thermal coupling coefficients
有效热耦合系数
1.
The experimental measurements of the effective thermal coupling coefficients α_(eff) and thermal coupling α_a of LF6M aluminum alloy plates irradiated by the CW /COIL(wavelent.
３１５μｍ）氧碘化学激光（ＣＷ／ＣＯＩＬ），与ＬＦ６Ｍ板相互作用的有效热耦合系数α＿（ｅｆｆ）和热耦合率α＿ａ，进行了实验测量。
4) 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。
5) 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。
6) electromechanical coupling factors
机电耦合系数
1.
A new type of shear horizontal wave which excited by composing a heavy metal film on an ST cut 90°X propagation(direction perpendicular to X-axis) quartz substrate was analyzed by the methods of elastic wave propagation in thin layers,and the dependence of SAW velocities and electromechanical coupling factors on normalized thickness of various metal film were acquired.
采用层状介质中波的传播分析法对一种在ST-90°X切割的石英基底上覆盖重金属膜激发的一种新型纯剪切(SH)波的传播特性进行了分析,并得到了传播速度、机电耦合系数与金属膜厚和传播方向的关系以及位移分量分布曲线。
2.
In this paper,near the morphortropic phase boundary x =0 53,crystal orientation dependence of piezoelectric constants d 33 , d 31 and electromechanical coupling factors k 33 ,k 31 have been calculated phenomenologically for PZT60/40(60%PbZrO 3,40%PbTiO 3)in three dimensional space by means of transformations.
5 3)附近 ,利用坐标变换法 ,对压电性能较好的 PZT6 0 / 40 (6 0 % Pb Zr O3,40 %Pb Ti O3)晶体的压电系数 d33、d31 以及机电耦合系数 k33、k31 的空间分布进行了计算 ,绘制了它们在空间分布的直观图像 ,得到了它们的最大值及其方位 ,其中 d33的最大值为 189p C/ N ,是未变换前的 2 。
补充资料：横向机电耦合系数
分子式：
CAS号：
性质：表示横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K31表示。当振子的带宽Δf=fa-fr(式中，fa为并联谐振频率；fr为串联谐振频率)较小时，可用下式近似求得：。也可从平面耦合系数Kp换算而得:(式中，σE为泊松比)。它可作为大致判定该压电材料用于制造横向长度伸缩振子振动器件时是否适用。
CAS号：
性质：表示横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K31表示。当振子的带宽Δf=fa-fr(式中，fa为并联谐振频率；fr为串联谐振频率)较小时，可用下式近似求得：。也可从平面耦合系数Kp换算而得:(式中，σE为泊松比)。它可作为大致判定该压电材料用于制造横向长度伸缩振子振动器件时是否适用。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条