Utilization of the high-frequency piezoelectric ceramic hollow spheres for exposimetry and tissue ablation

2003 ◽  
Author(s):  
O.M. Al-Bataineh ◽  
R.J. Meyer ◽  
R.E. Newnharn ◽  
N.B. Smith
Keyword(s):  
High Frequency ◽  
Piezoelectric Ceramic ◽  
Hollow Spheres ◽  
Tissue Ablation

Feasibility Of Miniature High-Frequency Piezoelectric Ceramic Hollow Spheres For Exposimetry And Tissue Ablation

2004 ◽  
Vol 8 (2) ◽  
pp. 78-83 ◽  
Author(s):  
Osama M. Al-Bataineh ◽  
Douglas C. Markley ◽  
Richard J. Meyer ◽  
Robert E. Newnham ◽  
Nadine Barrie Smith
Keyword(s):  
High Frequency ◽  
Piezoelectric Ceramic ◽  
Hollow Spheres ◽  
Tissue Ablation

New KNN-based lead-free piezoelectric ceramic for high-frequency ultrasound transducer applications

2015 ◽  
Vol 118 (4) ◽  
pp. 1177-1181 ◽  
Author(s):  
Jun Ou-Yang ◽  
Benpeng Zhu ◽  
Yue Zhang ◽  
Shi Chen ◽  
Xiaofei Yang ◽  
...  
Keyword(s):  
High Frequency ◽  
Piezoelectric Ceramic ◽  
Lead Free ◽  
Ultrasound Transducer ◽  
High Frequency Ultrasound ◽  
Frequency Ultrasound

Damage Identification of Multi-Type Joints with Using Electro-Impedance Method by Smart Sensors

2008 ◽  
Vol 33-37 ◽  
pp. 279-284
Author(s):  
Gao Ping Wang ◽  
Yong Hong ◽  
Byeong Hee Han ◽  
Dong Pyo Hong ◽  
Young Moon Kim
Keyword(s):  
High Frequency ◽  
Piezoelectric Ceramic ◽  
Damage Identification ◽  
Lap Joints ◽  
Real Field ◽  
Impedance Method ◽  
Smart Sensors ◽  
Experimental Investigations ◽  
Frequency Range ◽  
Important Position

The use of multi-type joints, such as rivet joints, adhesive joints, lap joints, L-shape joints, etc., has been driven by the need for stronger and lighter structures, particularly in bridges, aerospace structures, pipeline systems, automobiles industry. Among the multi-type joints, lap joints and L-shape joints possess a considerably important position. Moreover, in many real-field situations, it is not accessible to such joints, and thus it gives additional difficulties to detect damages. Fortunately, the electro-impedance method based on the use of smart sensors provides special opportunities for damage detection of such joints, which are not easy or impossible to be accessible. The piezoelectric-ceramic sensors which simultaneously act as an actuator and sensor are widely used for structural health monitoring. In the high frequency range, the electro-impedance-based technique using a piezoelectric-ceramic patch is very sensitive for the evaluation of the incipient and small damages. A large amount of experiments were executed and several conditions were imposed to simulate real-time damage, such as the bolt loosening and bolt absence. The different indices are discussed and executed to efficiently quantify the damage conditions. The theory behind this technique and the experimental investigations are presented in this paper. The analytical results strongly show the detectability and reliability of this method.

Using High Frequency LIMM to characterize the poling state of piezoelectric ceramic thin films

2015 ◽  
Vol 1805 ◽  
Author(s):  
Mark Stewart ◽  
Markys G Cain
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
Piezoelectric Ceramic ◽  
Laser Intensity ◽  
Polarization State ◽  
Intensity Modulation ◽  
Modulation Method ◽  
Piezoelectric Thin Films ◽  
Ceramic Thin Films ◽  
Dc Bias

ABSTRACTThe Laser Intensity Modulation Method, LIMM, has been used to investigate the poling state of ceramic piezoelectric thin films. The frequency of the system has been extended to 70MHz to enable films of thicknesses down to 100nm to be measured. A unique development has been to sweep the DC bias applied to the sample whilst performing the LIMM measurement, thus giving pseudo PE loops. These PE loops are unique in that they represent the polarization state within a distinct depth of the film, whereas normally PE loops are a result of the complete film. This allows us to investigate processes occurring within different regions of the film.

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