Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019268
Guangxia Xie, Xin-ran Xu, Zhen-yu Zheng, Jia-rong Wang
The dielectric and piezoelectric properties of tetragonal PIN-PMN-PT single crystal under dc voltage have been systematically investigated. The dielectric constant and piezoelectric coefficient decreased, and dielectric loss remained basically invariable with increasing of the dc voltage(0~2000V). Although the dc voltage ensures the single crystal is not depolarized, a balance need to be found between the applied voltage and the electrical properties of the single crystal.
{"title":"Electrical Properties of Tetragonal PIN-PMN-PT Single Crystal under DC Voltage","authors":"Guangxia Xie, Xin-ran Xu, Zhen-yu Zheng, Jia-rong Wang","doi":"10.1109/SPAWDA48812.2019.9019268","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019268","url":null,"abstract":"The dielectric and piezoelectric properties of tetragonal PIN-PMN-PT single crystal under dc voltage have been systematically investigated. The dielectric constant and piezoelectric coefficient decreased, and dielectric loss remained basically invariable with increasing of the dc voltage(0~2000V). Although the dc voltage ensures the single crystal is not depolarized, a balance need to be found between the applied voltage and the electrical properties of the single crystal.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133789685","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019305
Nian Li, Bin Wang, Z. Qian
In recent years, film bulk acoustic wave resonators (FBARs) have been successfully utilized in almost every wireless system due to their good performance. To optimize the working performance of FBAR, frame-like structure was previously proposed to suppress the resonances of so-called spurious modes. Another aspect that has impact on the working performance of FBAR is the undesired coupling modes, which were rarely studied due to the lack of proper theoretical tools. In this paper, a fast approach for the structural design of frame-like FBARs is proposed with the use of two-dimensional plate theory. The widely used state-vector approach is applied here and both free and forced vibration results are obtained. The structure size of frame-like FBAR is determined through the analysis of frequency spectra and the results are compared with those obtained with 3D FEM software to ensure the accuracy of our proposed method. Mode shapes and admittance response curves show the suppression ability of spurious modes and the undesired coupling modes in the designed frame-like structure. Results in this paper show that the presented method can work as an effective tool in engineering design process.
{"title":"A Fast Approach for the Structural Design of Frame-Like Fbar Based on 2d Plate Theory","authors":"Nian Li, Bin Wang, Z. Qian","doi":"10.1109/SPAWDA48812.2019.9019305","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019305","url":null,"abstract":"In recent years, film bulk acoustic wave resonators (FBARs) have been successfully utilized in almost every wireless system due to their good performance. To optimize the working performance of FBAR, frame-like structure was previously proposed to suppress the resonances of so-called spurious modes. Another aspect that has impact on the working performance of FBAR is the undesired coupling modes, which were rarely studied due to the lack of proper theoretical tools. In this paper, a fast approach for the structural design of frame-like FBARs is proposed with the use of two-dimensional plate theory. The widely used state-vector approach is applied here and both free and forced vibration results are obtained. The structure size of frame-like FBAR is determined through the analysis of frequency spectra and the results are compared with those obtained with 3D FEM software to ensure the accuracy of our proposed method. Mode shapes and admittance response curves show the suppression ability of spurious modes and the undesired coupling modes in the designed frame-like structure. Results in this paper show that the presented method can work as an effective tool in engineering design process.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"61 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114038317","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019263
Yu Xue, Qianlong He, Jinqiang Li
This paper addresses active thermal buckling control of angle-ply piezolaminated plates under uniform, linear and non-linear temperature rises. The four-variable trigonometric shear deformation theory is applied in the structural modeling. The temperature difference of upper and lower faces of plate is fed back to actuator as control voltage to control the thermal buckling. The correctness of present method is verified by comparing the frequency and critical buckling temperature with published results. The effects of geometric parameters, boundary condition, and fiber angle on the active thermal buckling control are studied. The results show that the temperature distribution strongly influences the critical buckling temperature and the active thermal buckling control method can extremely increase the critical buckling temperature of piezolaminated plates.
{"title":"Active Thermal Buckling Control of Piezolaminated Plates Under Different Temperature Distribution","authors":"Yu Xue, Qianlong He, Jinqiang Li","doi":"10.1109/SPAWDA48812.2019.9019263","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019263","url":null,"abstract":"This paper addresses active thermal buckling control of angle-ply piezolaminated plates under uniform, linear and non-linear temperature rises. The four-variable trigonometric shear deformation theory is applied in the structural modeling. The temperature difference of upper and lower faces of plate is fed back to actuator as control voltage to control the thermal buckling. The correctness of present method is verified by comparing the frequency and critical buckling temperature with published results. The effects of geometric parameters, boundary condition, and fiber angle on the active thermal buckling control are studied. The results show that the temperature distribution strongly influences the critical buckling temperature and the active thermal buckling control method can extremely increase the critical buckling temperature of piezolaminated plates.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"1245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116232171","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019333
Sibo Zhou, Yan Shi, Jie Wang, Gun Gao
This paper aims at developing a simplified analytical model, as verified by the Hilbert-Riemann theoretical solution of interfacial cracks, to study the thermal stress distributions in solar cell laminated structures under thermal loadings. The interface thermal failure problem is analyzed in terms of the packaging materials and solar cell materials of simulated models, maximum interfacial normal stress, and stress critical point. It provides some guidance for the design and optimization of solar modules.
{"title":"A Simplified Model for Thermal Stress Analyses of Bi-Layers With Extreme Dissimilar Thermal Properties in Solar Cell","authors":"Sibo Zhou, Yan Shi, Jie Wang, Gun Gao","doi":"10.1109/SPAWDA48812.2019.9019333","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019333","url":null,"abstract":"This paper aims at developing a simplified analytical model, as verified by the Hilbert-Riemann theoretical solution of interfacial cracks, to study the thermal stress distributions in solar cell laminated structures under thermal loadings. The interface thermal failure problem is analyzed in terms of the packaging materials and solar cell materials of simulated models, maximum interfacial normal stress, and stress critical point. It provides some guidance for the design and optimization of solar modules.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125432398","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019295
Hui-chao Zhang, Shi-ping Li, Xin-ran Xu
A small-sized flextensional transducer is introduced which uses piezoelectric single crystal as driving material to achieve low-frequency and high-power emission. By analyzing the influence of structure for CLASS IV flextensional transducer on the radiation capacity and the vibrator stress, ratio for major axis length/minor axis length, shell height, shell thickness, the position of vibrators and so on are reasonably selected, which can reduce the energy loss caused by the bending deformation of the vibrator, and radiation capacity of the transducer is designed to improve. The maximum size of the single crystal CLASS IV flextensional transducer is 270mm, the quality factor is 248 W/(m3•Hz), and sound source level is 7.4 dB higher than the piezoelectric ceramic transducer of the same size and structure.
{"title":"A Low Frequency High-Power PMNT Flextensional Transducer","authors":"Hui-chao Zhang, Shi-ping Li, Xin-ran Xu","doi":"10.1109/SPAWDA48812.2019.9019295","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019295","url":null,"abstract":"A small-sized flextensional transducer is introduced which uses piezoelectric single crystal as driving material to achieve low-frequency and high-power emission. By analyzing the influence of structure for CLASS IV flextensional transducer on the radiation capacity and the vibrator stress, ratio for major axis length/minor axis length, shell height, shell thickness, the position of vibrators and so on are reasonably selected, which can reduce the energy loss caused by the bending deformation of the vibrator, and radiation capacity of the transducer is designed to improve. The maximum size of the single crystal CLASS IV flextensional transducer is 270mm, the quality factor is 248 W/(m3•Hz), and sound source level is 7.4 dB higher than the piezoelectric ceramic transducer of the same size and structure.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122284617","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019233
Yulin Cui, Yan Shi, C. Gao
The development of flexible electronics has aroused great interest in the fracture of soft materials. In general, fracture of brittle materials is mainly attributed to cracks, while hard inclusions in soft materials should be considered as dangerous factor, accordingly. However, most researches on soft materials are based on the theory of linear elastic fracture. In this paper, soft materials structures with different shapes of hard inclusions are fabricated by 3D printing method and subjected to tensile testing. The applicability of the theoretical model based on linear assumption is investigated via finite element and experimental analyses.
{"title":"Fracture of Soft Materials with Irregular Shape Hard Inclusions","authors":"Yulin Cui, Yan Shi, C. Gao","doi":"10.1109/SPAWDA48812.2019.9019233","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019233","url":null,"abstract":"The development of flexible electronics has aroused great interest in the fracture of soft materials. In general, fracture of brittle materials is mainly attributed to cracks, while hard inclusions in soft materials should be considered as dangerous factor, accordingly. However, most researches on soft materials are based on the theory of linear elastic fracture. In this paper, soft materials structures with different shapes of hard inclusions are fabricated by 3D printing method and subjected to tensile testing. The applicability of the theoretical model based on linear assumption is investigated via finite element and experimental analyses.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132640707","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019293
Xin SHEN, Jianguo Zhao, Qing Xiao, Quan Zhang, Yan Peng
In recent years, piezoelectric actuators (PEAs) are widely used in precision positioning stage due to its outstanding advantages of small size, high displacement resolution and fast response. However, in practical applications, PEAs are also affected by the inherent nonlinear factors such as hysteresis and creep, which further results the positioning accuracy deceasing of the stage. In this paper, a modified Bouc-Wen model is proposed to identify the hysteresis characteristics of PEAs. In order to improve the identification accuracy of the model, the modified Bouc-Wen model parameters are identified by the Genetic Algorithm (GA) which has a good global search capability. The experimental results show that the range of the absolute error (RAE) of the modified Bouc-Wen model is reduced by 5.87% and the average fitness value (AFV) is reduced by 4.87% compared to the standard Bouc-Wen model, which further validate the accuracy of the proposed modified Bouc-Wen model.
{"title":"Identification of Asymmetric Bouc-Wen Model Based on Ga Algorithm for a Piezo-Actuated Stage","authors":"Xin SHEN, Jianguo Zhao, Qing Xiao, Quan Zhang, Yan Peng","doi":"10.1109/SPAWDA48812.2019.9019293","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019293","url":null,"abstract":"In recent years, piezoelectric actuators (PEAs) are widely used in precision positioning stage due to its outstanding advantages of small size, high displacement resolution and fast response. However, in practical applications, PEAs are also affected by the inherent nonlinear factors such as hysteresis and creep, which further results the positioning accuracy deceasing of the stage. In this paper, a modified Bouc-Wen model is proposed to identify the hysteresis characteristics of PEAs. In order to improve the identification accuracy of the model, the modified Bouc-Wen model parameters are identified by the Genetic Algorithm (GA) which has a good global search capability. The experimental results show that the range of the absolute error (RAE) of the modified Bouc-Wen model is reduced by 5.87% and the average fitness value (AFV) is reduced by 4.87% compared to the standard Bouc-Wen model, which further validate the accuracy of the proposed modified Bouc-Wen model.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134388316","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}
The trigonal lithium niobate crystal (LiNbO3, LN) is a multi-functional material, which possesses excellent pyroelectric and piezoelectric properties as well as the nonlinear optical properties etc. In this paper, the stability of electro-elastic properties of LN crystal irradiated by the 6MeV Xe23+ ions were evaluated for potential piezoelectric applications in harsh environment. the electrical resistivity of the irradiated LN was found to decrease with increasing irradiation dose. In contrast to the electrical resistivity, the relative dielectric permittivity ε22/ε0 of LN sample was found to increase with increasing irradiation dose. The values of electromechanical coupling factor k21, the elastic compliance s11 and the piezoelectric coefficient d21 for the irradiated samples were determined and found that the irradiated LN crystal could maintain its electro-elastic properties similar to the pristine crystal.
{"title":"The Electro-Elastic Stability of LiNbO3 Crystal Irradiated By 6MeV Xe23+","authors":"Shi-wei Tian, Feifei Chen, Chao Jiang, Fang-lin Li, Guangda Wu, Mengdi Fan, F. Yu, Zhengping Wang, Xian Zhao","doi":"10.1109/SPAWDA48812.2019.9019251","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019251","url":null,"abstract":"The trigonal lithium niobate crystal (LiNbO3, LN) is a multi-functional material, which possesses excellent pyroelectric and piezoelectric properties as well as the nonlinear optical properties etc. In this paper, the stability of electro-elastic properties of LN crystal irradiated by the 6MeV Xe23+ ions were evaluated for potential piezoelectric applications in harsh environment. the electrical resistivity of the irradiated LN was found to decrease with increasing irradiation dose. In contrast to the electrical resistivity, the relative dielectric permittivity ε22/ε0 of LN sample was found to increase with increasing irradiation dose. The values of electromechanical coupling factor k21, the elastic compliance s11 and the piezoelectric coefficient d21 for the irradiated samples were determined and found that the irradiated LN crystal could maintain its electro-elastic properties similar to the pristine crystal.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124014680","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019282
Rong-jian Ling, M. Chao, Ju-lian Shen, L. Shen, Zhen Li, Ji Wang
Quartz crystal resonators are the core elements of frequency control in modern communication systems and network technology. In the processing of quartz crystal blanks, the choice of different grinding methods will result in blanks with different roughness. In this paper, we prepared four groups of quartz crystal blanks from the TXC production line with different surface roughness conditions, and it was verified that the surface roughness of blanks had a significant effect on the characteristics of resonators.
{"title":"The Effect of Surface Roughness on the performance of Quartz Crystal Resonators","authors":"Rong-jian Ling, M. Chao, Ju-lian Shen, L. Shen, Zhen Li, Ji Wang","doi":"10.1109/SPAWDA48812.2019.9019282","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019282","url":null,"abstract":"Quartz crystal resonators are the core elements of frequency control in modern communication systems and network technology. In the processing of quartz crystal blanks, the choice of different grinding methods will result in blanks with different roughness. In this paper, we prepared four groups of quartz crystal blanks from the TXC production line with different surface roughness conditions, and it was verified that the surface roughness of blanks had a significant effect on the characteristics of resonators.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121183911","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}
Pub Date : 2019-11-01DOI: 10.1109/SPAWDA48812.2019.9019300
Fangyi Wang, Liang Wang, Jiamei Jin
The applications of traditional thermal bubble microfluidic driving methods are limited by high local heat. To overcome this problem, a novel microfluidic driving method based on ultrasonic cavitation bubbles is proposed in this paper. A piezoelectric transducer is employed instead of thermal method, to generate ultrasonic cavitation bubbles, in this case, the flow rate can be extremely low but continuous, without heat problems. A prototype based on this principle has been designed, fabricated and tested, showing a minimal flow rate of 0.1873 nL/min with 80Vpp applied voltage, and a maximal valid flow rate of 17.741 nL/min with 130Vpp applied voltage at the frequency of 23.78kHz.
{"title":"A Microfluidic Driving Method based on Ultrasonic Cavitation Bubbles","authors":"Fangyi Wang, Liang Wang, Jiamei Jin","doi":"10.1109/SPAWDA48812.2019.9019300","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019300","url":null,"abstract":"The applications of traditional thermal bubble microfluidic driving methods are limited by high local heat. To overcome this problem, a novel microfluidic driving method based on ultrasonic cavitation bubbles is proposed in this paper. A piezoelectric transducer is employed instead of thermal method, to generate ultrasonic cavitation bubbles, in this case, the flow rate can be extremely low but continuous, without heat problems. A prototype based on this principle has been designed, fabricated and tested, showing a minimal flow rate of 0.1873 nL/min with 80Vpp applied voltage, and a maximal valid flow rate of 17.741 nL/min with 130Vpp applied voltage at the frequency of 23.78kHz.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115637243","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}
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