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2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications最新文献

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Structure and properties of pizeoelctric polymer designed by unsing first principle calculation 用第一性原理计算设计了压电聚合物的结构和性能
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775849
H. Fan, Wei-jia Wang, Zhi-ying Wang
{"title":"Structure and properties of pizeoelctric polymer designed by unsing first principle calculation","authors":"H. Fan, Wei-jia Wang, Zhi-ying Wang","doi":"10.1109/SPAWDA.2008.4775849","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775849","url":null,"abstract":"The internal rotations (of dimer models), geometries, energies, vibration spectra, dipole moments and molecular polarizabilities of poly (vinylidene fluoride) (PVDF) of alpha- and beta-chain models were studied with the first principle density functional theory (DFT). Electric properties of PVDF affected by chain lengths were examined. The chain length was also discussed to determine the chain stabilities and conformations, which are coincided with the experimental results.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124067084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on an ultrasonic brake 超声波制动器的研究
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775765
B. Jia, Zhi-jun Sun
{"title":"Research on an ultrasonic brake","authors":"B. Jia, Zhi-jun Sun","doi":"10.1109/SPAWDA.2008.4775765","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775765","url":null,"abstract":"A new design of the ultrasonic brake is proposed. The ultrasonic brake takes the advantage of the ultrasonic levitation. First, the structure of the stator of the brake is designed. In the FE analysis, the mode of flexural vibration of the stator is used. The stator is made of stainless steel and fixed by three pins on the outer diameter, so that the stator vibrates more fiercely in the axial direction. Secondly, an experiment on ultrasonic levitation to determine the relationship between static friction torque and voltage and frequency is performed. Then we know that the rotor could rotate overcoming the pre-pressure of 16.7 N when the voltage is 100 Vp-p, and frequency is 23.5 KHz. Finally, a method of assembling is proposed so that make diameter is smaller and can adjust the pre-pressure. So, the brake has a 45 mm diameter and 12 mm in thickness. The brake overcomes the disadvantage of ordinary brakes, such as over size, high lubrication, and so on.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129165665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Free vibration of multiferroic simply supported circular cylindrical panels 多铁简支圆筒形板的自由振动
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775739
Chun-li Zhang, Wei-qiu Chen
{"title":"Free vibration of multiferroic simply supported circular cylindrical panels","authors":"Chun-li Zhang, Wei-qiu Chen","doi":"10.1109/SPAWDA.2008.4775739","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775739","url":null,"abstract":"Two dimensional equations are derived for multiferroic circular cylindrical panels with small aspect ratio. The displacement, electrical potential and magnetic potential are assumed to be of zero-order of the radial thickness. The frequency equation is presented for a multiferroic cylindrical panel composed of CoFe2O3 and BaTiO3 with four edges simply supported. Numerical examples show clearly the effects of half-wave numbers in the axial and circumferential directions on the frequency parameters.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126362793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis and design of stators for linear noncontact type actuators based on NFAL 基于nal的线性非接触式作动器定子分析与设计
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775803
Chao Chen, Yun-tao Sun, Chun-sheng Zhao
{"title":"Analysis and design of stators for linear noncontact type actuators based on NFAL","authors":"Chao Chen, Yun-tao Sun, Chun-sheng Zhao","doi":"10.1109/SPAWDA.2008.4775803","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775803","url":null,"abstract":"The suspension mechanism based on NFAL (near-field acoustic levitation) is fundamentally different from that in standing wave levitation. The proposed linear noncontact type actuator can levitate and carry the object along the direction of traveling wave in the planar plate, which produces the high intensity acoustic field. Moreover the object is suspended at the height only between tens and hundreds of microns. For the important component of linear noncontact type actuator, ultrasonic transducer, the theoretical analysis and optimization design were carried out. The prototypes were manufactured and the modal parameters were measured. Then the validation of the analysis and design for the novel actuator stator was obtained, which laid the foundation for the further study on the NFAL mechanism and the corresponding mathematical model representing the complete actuator.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"92 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128019675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Perturbation solution of vibrations of a magnetostrictive actuator 磁致伸缩作动器振动的微扰解
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775834
L. Qin, X. Shang, Fan Wang
{"title":"Perturbation solution of vibrations of a magnetostrictive actuator","authors":"L. Qin, X. Shang, Fan Wang","doi":"10.1109/SPAWDA.2008.4775834","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775834","url":null,"abstract":"The vibrations of a magnetostrictive actuator excited by a harmonic alternating current are analyzed. In the mathematical modeling of the problem, some coefficients in governing equation and boundary condition are of periodic variation with time. Using regular perturbation approach to the mathematical problem including a small parameter, approximately analytical solution is obtained. The amplitude-frequency characteristic curves from the analytical solution agree well with the experimental data in reference, which verifies the validation of the present method and solutions.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117285722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The research of laminated circle piezoelectric transformer for ozone generator 臭氧发生器用层压圆形压电变压器的研究
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775861
Li-yang Yu, Guo-hua Yao
{"title":"The research of laminated circle piezoelectric transformer for ozone generator","authors":"Li-yang Yu, Guo-hua Yao","doi":"10.1109/SPAWDA.2008.4775861","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775861","url":null,"abstract":"The preparation process of Ozone based on dielectric barrier discharge is the most effective method, and highly efficient power is the key to the preparation process. As the merits of piezoelectric transformer are high-frequency, high step-up and no electromagnetic pollution relative to the electromagnetic transformer, it is particularly suited to the ozone generator. A laminated circuit piezoelectric transformer is designed for the ozone generator. The power that is transformed by the thickness shear vibration mode and the radial stretching vibration mode is expected to be higher in output power than the Rosen-type. In the last, the power of the ozone generator is designed and simulated.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124329487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electro-elastic stress analysis of a screw dislocation interacting with interface in piezoelectric solid 压电固体中螺位错与界面相互作用的电弹性应力分析
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775738
Y. Kong, Shudong Guo, Jinxi Liu
{"title":"Electro-elastic stress analysis of a screw dislocation interacting with interface in piezoelectric solid","authors":"Y. Kong, Shudong Guo, Jinxi Liu","doi":"10.1109/SPAWDA.2008.4775738","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775738","url":null,"abstract":"The electro-elastic interaction of a piezoelectric screw dislocation with interface is considered. The surface of layers is assumed to be mechanically free and electrically open. The electro-elastic fields have been given explicitly by using the perturbation concept and the method of Laurent series expansion. Based on the derived solutions, numerical examples are given to illustrate the influences of dislocation location, piezoelectric effect and material properties on the interfacial stresses and image force. The obtained results show that: the piezoelectric effect is able to change the interaction of a screw dislocation with an interface and a free boundary; the difference between elastic constants has obvious influence on the interfacial stress.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121285683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of hardness of frictional materials on properties of ultrasonic motors 摩擦材料硬度对超声电机性能的影响
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775826
Qing-jun Ding, Lin Yang, Chun-sheng Zhao
{"title":"Effect of hardness of frictional materials on properties of ultrasonic motors","authors":"Qing-jun Ding, Lin Yang, Chun-sheng Zhao","doi":"10.1109/SPAWDA.2008.4775826","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775826","url":null,"abstract":"In this paper, PTFE composite, epoxy composite, phenolic composites, hard aluminum, cemented carbide as friction materials are respectively paired to ultrasonic motors, with the stator composed by phosphor bronze and piezoelectric ceramic. Mechanical properties and transient characteristics of ultrasonic motors are tested. The results show a monotonic increase in rotation speed, and a monotonic decrease in stalling torque with friction materials' hardness. There is little effect of friction materials' hardness on the transient performance of ultrasonic motors.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132406408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A study on the nanocrystalline titanium dioxide synthesized by ultrasonic-assisted sol-gel process 超声辅助溶胶-凝胶法制备纳米二氧化钛的研究
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775820
Wanyu Chen, Yue-tao Yang, Hong Wang, Xiao-Jun Liu, Shu-Yi Zhang
{"title":"A study on the nanocrystalline titanium dioxide synthesized by ultrasonic-assisted sol-gel process","authors":"Wanyu Chen, Yue-tao Yang, Hong Wang, Xiao-Jun Liu, Shu-Yi Zhang","doi":"10.1109/SPAWDA.2008.4775820","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775820","url":null,"abstract":"In this work, nanocrystalline titanium dioxide (TiO2) powders doped with rare earth ion (Nd3+) were prepared by sol-gel process via ultrasonic irradiation. The frequency of ultrasonic was 20 kHz. The nanocrystalline powders were investigated by X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM), photoacoustic spectroscopy (PAS) which has been widely used to investigate the chemical and physical properties of many kinds of samples. For the special electronic structure of the rare earth ion, Nd3+ was used as a probe by photoacoustic spectroscopy to study the structural variation of the samples treated by ultrasonic irradiation during the sol-gel process. With the temperature of heat treatment increasing, the heat treatment(1-beta) of Nd3+ ion increases. As the temperature over 500degC, the nephelauxetic (1-beta) effect changes little.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130795422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mamnufacture of BaTiO3 based ceramic powder and its property BaTiO3基陶瓷粉体的制备及其性能
2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775810
Ling Wang, Hao-feng Zhao
{"title":"Mamnufacture of BaTiO3 based ceramic powder and its property","authors":"Ling Wang, Hao-feng Zhao","doi":"10.1109/SPAWDA.2008.4775810","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775810","url":null,"abstract":"BaTiO<sub>3</sub> based ceramics were applied widely to make electronics units. But conventional processing of BaTiO<sub>3</sub> ceramic particles relies on the solid-state reactions, by which the coarse, impure, inhomogeneous and multiphase powders were produced. In this paper, new method was used to synthesize BaTiO<sub>3</sub> based ceramic nanopowder with the particle size 20- 90 nm by use of Ba(NO<sub>3</sub>)<sub>2</sub> - Ti(OC<sub>4</sub>H<sub>9</sub>)<sub>4</sub>-ammonia-citric acid raw material system. BET equipment was used to measure the specific surface area of BaTiO<sub>3</sub> based ceramic. The pacific surface area is 15 m<sup>2</sup>/g. Sedimentometry was applied to measure particle size and distribution. The test results show that the fine BaTiO<sub>3</sub> based ceramic particles were well distributed and the dielectric constant of the material is more than 5000.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131374772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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