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piezoelectric voltage
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  压电电压
    The properties(piezoelectric voltage constant g33=42.8 V·m/N,piezoelectric strain constant d33=30 pC/N)of the composite prepared by microwave irradiation technique are more suitable for hydrophone.
    但微波工艺合成的复合材料的界面结合更好,有利于压电陶瓷的极化,其压电电压系数g33达42.8(V.m/N),更适合作为接收型传感器。
短句来源
    The results show that the piezoelectric voltage factor g33 and the mechanical quality Qm decrease nonlinearly with the relative humidity increasing.
    结果表明:随着相对湿度的增大,压电电压常数g33与机械品质因数Qm呈非线性减小。
短句来源
    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.
    结果表明:随着PMN体积分数增大,压电应变常数d33呈非线性增大,压电电压常数g33呈非线性减小。
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    The piezoelectric constant ε 33 is 43, and the best piezoelectric voltage parameter is 23.1×10 -3 V·m·N -1 .
    ,样品能够达到稳定极化的最佳g33的值为:23.1×10-3V·m·N-1。
短句来源
    Compared with the piezoelectric voltage factor, the humidity has little effect on the piezoelectric strain factor d33 and the electromechanical coupling coefficients Kp and Kt.
    湿度对压电应变常数d33以及机电耦合系数Kp和Kt的影响较小。
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  piezoelectric voltage
The effect of the foreign stress on the piezoelectric voltage response of the PZT/LNO/glass was investigated.
      
Piezoelectric charge constant (d31) and piezoelectric voltage output coefficient (g31) increased up to -130 pC/N and -24.9?×?103Vm/N, respectively, with increasing ZnO content.
      
Piezoelectric charge constant (d31) and piezoelectric voltage output coefficient (g31) increased up to -130 pC/N and -24.9 × 103Vm/N, respectively, with increasing ZnO content.
      
In order to accommodate such high dynamic pressure the transducer and cap materials were modified and it was found that the higher piezoelectric voltage constant ceramic provided the higher output power.
      
Although the piezoelectric voltage coefficient of the 2-2 composites showed a minor improvement with increasing θ at 45°, the g33 value of the 3-3 composites increased considerably with θ and reached 80 mV/N at θ = 45°.
      
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In order to prepare the piezoelectrical compostie of PT/epoxy resin with high volume fill in rate of PT, the PT powder was distributed into the acetone solution of epoxy resin, and then the solvent was removed by vacuuming. In this way, the epoxy resin can be well mixed with the PT powder, and gas holes in interface of the solid composite were greatly reduced. The results show that the prepared composite has a high volume fill in rate of PT powder up to 70% and a smooth surface without macro defects. The...

In order to prepare the piezoelectrical compostie of PT/epoxy resin with high volume fill in rate of PT, the PT powder was distributed into the acetone solution of epoxy resin, and then the solvent was removed by vacuuming. In this way, the epoxy resin can be well mixed with the PT powder, and gas holes in interface of the solid composite were greatly reduced. The results show that the prepared composite has a high volume fill in rate of PT powder up to 70% and a smooth surface without macro defects. The test results of the piezoelectric properties of the composite show that the value of d 33 vary as the polarization condition. The piezoelectric constant ε 33 is 43, and the best piezoelectric voltage parameter is 23.1×10 -3 V·m·N -1 .

为了制备高体积填充率的钛酸铅-环氧压电复合材料,本文采用了将环氧树脂的丙酮稀溶液与钛酸铅细粉混合再抽真空除去溶剂的方法,这样有利于环氧树脂与钛酸铅进行良好的、均匀的复合,大大减少了界面气孔,所制得的复合材料钛酸铅填充率高(体积填充率达70%),复合材料表面光滑无宏观缺陷。压电性能测定结果表明:极化条件不同,d33的值也不同,介电常数ε33均为43。,样品能够达到稳定极化的最佳g33的值为:23.1×10-3V·m·N-1。

Intelligent structures are attracting more attention of scientists and engineers in the field of civil engineering.In an intelligent structure,smart materials play animportant role,from which sensors and actuators are made.In order to solve the mismatch problem between smart materials and host materials,which is popular in the application of intelligent structures in the civil engineering field.Cement based materials were chosen to be the matrix of piezoelectric smart materials.Through adjusting the mix proportion...

Intelligent structures are attracting more attention of scientists and engineers in the field of civil engineering.In an intelligent structure,smart materials play animportant role,from which sensors and actuators are made.In order to solve the mismatch problem between smart materials and host materials,which is popular in the application of intelligent structures in the civil engineering field.Cement based materials were chosen to be the matrix of piezoelectric smart materials.Through adjusting the mix proportion and selecting the components of cement based matrix,problems of fabrication of 2 2 cement based piezoelectric composite were overcome.Using a testing system integrating computer,MTS tester,oscilloscope,signal generator,linear amplifier,HP IB interface hardware and software,the elastic,sensory and actuating properties were studied.The following results can be obtained.The composite is linearly elastic.The sensory and actuating properties have obvious dependence on frequency.In the range of ultra low frequency,the magnitude of piezoelectric voltage factor of the composite increases linearly with frequency,the phase increases quickly at first,but then approaches to a constant,The piezoelectric properties of the composite are similar to those of polymer/ceramic piezoelectric composites.

在土木工程领域中 ,智能结构系统越来越受到人们的重视 ,而在智能结构系统中机敏材料是不可缺的元素 ,它是构成智能结构中的传感器和驱动器的关键材料。针对目前土木工程领域智能结构中存在的结构材料与机敏材料相容性差问题 ,采用水泥基材料作为压电机敏复合材料的基体 ,通过调节水泥基材料组分和比例 ,克服水泥基材料与压电陶瓷在密度上的悬殊差异为材料准备带来的困难 ,制备出 2 - 2型水泥基压电机敏复合材料。同时 ,采用集成了微型计算机、MTS自动伺服试验机、示波器、信号发生器、线性放大器和 HP- IB界面的测试系统测量 2 -2型水泥基压电复合材料的弹性性能、传感性能和驱动性能。实验结果表明 ,在实验范围里 ,该材料具有线弹性性能 ;传感性能和驱动性能具有明显的频率依赖性 ;在超低频范围内 ,2 - 2型水泥基压电复合材料的压电电压系数的模值随频率线性增大 ,相角随频率增大开始时增大较快 ,随后趋于一常数 ;2 - 2型水泥基压电复合材料的压电性能与聚合物基压电复合材料相似。

Piezoelectric composites were prepared through microwave irradiation.The effect of three techniques(cold-temperature-pressing,hot-temperature-calendering and microwave irradiation) on microstructure,dielectric and piezoelectric properties of the composites were investigated.Microwave irradiation technique and hot-temperature-calendering technique are superior to cold-temperature-pressing technique.The piezoelectric strain constant d33 was about 30 pC/N.Microwave irradiation technique improves the interfacial...

Piezoelectric composites were prepared through microwave irradiation.The effect of three techniques(cold-temperature-pressing,hot-temperature-calendering and microwave irradiation) on microstructure,dielectric and piezoelectric properties of the composites were investigated.Microwave irradiation technique and hot-temperature-calendering technique are superior to cold-temperature-pressing technique.The piezoelectric strain constant d33 was about 30 pC/N.Microwave irradiation technique improves the interfacial interaction between the piezoelectric ceramic powders and the matrix owing to physical effects,which is of benefit to pole the piezoelectric ceramic.The properties(piezoelectric voltage constant g33=42.8 V·m/N,piezoelectric strain constant d33=30 pC/N)of the composite prepared by microwave irradiation technique are more suitable for hydrophone.

利用微波原理合成出性能优良的压电复合材料,并研究了不同合成方法对复合压电材料的结构、介电和压电性能的影响。研究表明,微波合成与热压工艺获得的复合材料性能明显优于冷压工艺,两者的压电应力常数d33均在30pC/N左右。但微波工艺合成的复合材料的界面结合更好,有利于压电陶瓷的极化,其压电电压系数g33达42.8(V.m/N),更适合作为接收型传感器。

 
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