Sixth IEEE International Symposium on Applications of Ferroelectrics最新文献

{"title":"Mechanical Behavior of Ferroelectric Ceramics","authors":"S. Freiman","doi":"10.1109/ISAF.1986.201160","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201160","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121177624","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}

{"title":"Electromechanical Anisotropy in Modified Lead Titanate Ceramics","authors":"Dragan Damjanovic, T. R. Gururaja, S. Jang, L. Cross","doi":"10.1109/ISAF.1986.201154","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201154","url":null,"abstract":"Note: Penn State Univ,Mat Res Lab,University Pk,Pa 16802E6501Times Cited:0Cited References Count:0 Reference LC-ARTICLE-1986-001 Record created on 2006-08-21, modified on 2017-05-10","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121697667","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}

{"title":"Real-Time Investigation of the Piezoelectric Effect in Polyvinylidene Fluoride (B - Phase ) Using Synchrotron Radiation","authors":"J. Legrand, P. Delzenne, J. Lajzerowicz","doi":"10.1109/ISAF.1986.201204","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201204","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121779664","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}

{"title":"Piezoelectric Ceramic Reproducibility (For 33 Mode Transducer Applications)","authors":"A. C. Tims, D. L. Carson, G. Benthien","doi":"10.1109/ISAF.1986.201220","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201220","url":null,"abstract":"The lack of reproducibility and uniformity of piezoelectric ceramics is a problem that has plagued the Navy for over 30 years. As a result, and the need to specify ceramic for competitive procurements, the Navy has developed specifications that accommodate the variability of the ceramic and assure the transducer will meet performance requirements, be electroacoustically interchangeable, and be intermixable with existing units. A Simplified Guidance Xodel ( S G M ) has been developed that provides insight into the relationship between ceramic parameters and transducer design and performance. Experimental data are presented that validate the SGPl. New methods are presented to extract the piezoelectric material parameters from geometry dependent 33 mode ceramic rings. A dynamic tester has been developed to certify the performance of a composite ceramic stack. applications. Figure 1 shows a cut-away of a typical transducer element of interest. To achieve the solution, complicated computerized predictive models had to be augmented by what has been called a Simplified Guidance Model ( S G M ) in order to deduce the kernel of the solution. The heart or kernel of the solution has been referred to as DAS-7. It is a design adjustment method that allows one to match the electroacoustic performance of a proposed transducer to that of a baseline, and assure that the new transducer will duplicate the baseline and be electroacoustically interchangeable and intermixable. A derivation and discussion of the SGM and the relationship of the parameters in DAS-7 is presented in reference [ I ] . Simply stated, DAS-7 requires the rnanuEacturer to match the piezoelectric constant, d33, and free capacitance, CT, of the ceramic, t o that of the baseline. If, however, the manufacturer is unable to match both quantities, then he shall match the d33. The lack of reproducibility and uniformity of piezoelectric ceramics is a problem that has plagued the Navy since the introduction of ceramic sensors into fleet transducers over 30 years azo. After the d33 match has been achieved, then a As a result of this situation and the need to be one-time area adjustment, within prescribed limits, able to specify the piezoelectric ceramic €or a is allowed to either increase o r decrease CT to build-to-print Fabrication Specification Package match the baseline. Once the d,,, and CT, match ( F S P ) , a solution to the problem was developed. The Sonar Transducer Reliability Improvement Program (STRIP), with some assistance from the Transduction Sciences Program, has developed a complete, practical solution to the problem of reproducibility for a certain class of 33 mode transducer <_I has been achieved, the final criterion is that the compliance of the ceramic be such that when a stack is fabricated and placed in a primary subassembly, there must exist an acceptable fiberglass tuning ring to tune the assembly to the required resonznce frequency. Cut-away of Typical 33 Xode Transducer","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127565095","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}

{"title":"Piezoelectric Composite Transducers for Ultrasonic Diagnostic Applications","authors":"T. Bui, H. Chan, J. Unsworth","doi":"10.1109/ISAF.1986.201137","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201137","url":null,"abstract":"The acoustic impedance of the piezoelectric composites over the frequency range of 0.5-7.5h4hz was measured using the reflection , the echo shift and the resonant techniques. There was a significant difference between the impedance measured by the reflection technique in comparision with the other two techniques. Within each technique, the impedance was found to be a function of the volume percentage of the ceramic and not a function of frequency. Focused transducers were made using grinding and thermal forming processes. The pulse echo response of the composite transducers seems to be similar to ceramic transducers.","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128039501","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}

{"title":"Primary And Secondary Pyroelectricity in Highly Oriented Polyvinylidene Fluoride","authors":"I. Ward, G. Davies, J. Hurnphreys, J. Nanayakkara, E. Lewis, E. L. Nix, J. C. McGrath","doi":"10.1109/ISAF.1986.201122","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201122","url":null,"abstract":"Measurements of the pyroelectric response in both free and constrained conditions are presented for low-draw ratio, high-draw ratio and voided form I polyvinylidene fluoride sheets. The results are used together with related data for the piezoelectric response and for the thermal expansion behavior to estimate the primary and secondary components of the total macroscopic pyroelectricity. For the high-draw ratio and voided sheets the primary response was approximately 90% of the total pyroelectricity compared with 40% for the low-draw ratio nonvoided sheet. It is proposed that the role of reversible temperature-dependent crystallinity is more pronounced in the high-draw samples. Previous NMR studies provide support for this conclusion.","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133174780","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}

{"title":"Apparatus for Quasihydrostatic Measurement of Piezoelectric dhCoefficient","authors":"K. Schoch, A. Dereggi, S. Roth","doi":"10.1109/ISAF.1986.201241","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201241","url":null,"abstract":"Measurement of piezoelectric response of materials (dh) by a pressure pulse technique is described in this article. The sample is placed in a fluid-filled chamber fitted with a piston at one end. Impact on the piston creates a pressure pulse in the chamber, the duration and shape of which can be controlled. This method is effective with composite samples as well as polymer film samples. Introduction This paper describes a convenient and reliable method for measuring the hydrostatic piezoelectric coefficient of materials, dh. In this technique the sample is placed in a fluidfilled chamber and a hydrostatic pulse is applied by impacting a piston in the chamber. Pulse height, duration, and shape can be controlled readily, and in principle, information about frequency response can also be obtained. Automated data acquisition makes possible accurate calculation of response over the entire pressure pulse. Results on samples of various PbTiOj-based composites and poly(viny1idene fluoride)(PVF2) will be discussed. Other transient and ramp methods for measuring dh are described in the literature.[ll Experimental A . Pressure Generation The apparatus required for measurement is shown in Figure 1, and consists of a fluid-filled cell (Fiugre 2) containing the sample and a calibrated pressure transducer. The apparatus is an improved version of apparatus described previously, with digital processing added.[2,3] The cell was made by cutting a cylindrical chamber 3 inches long and 2 inches in diameter into a 4inch diameter 303 stainless steel rod. A calibrated pressure transducer was placed with the sensing diaphragm at the bottom of the chamber, and provision was made to connect a sample electrically to the outside of the chamber via a BNC connector. A piston of armoloy-plated brass was made to fit in the chamber for applying the pressure pulse. This sample cell containing the sample and a suitable fluid is placed in a drop tester, used to generate pulses reproducibly. Fig. 1-System block diagram Figure 2. Pressure Pulse Measurement Cell Pulses can be shaped by judicious selection of a material to be placed on top of the piston. The compliance of this coupling slug will determine the pulse length and shape. For example, a relatively soft material like a rubber vacuum hose produces a relatively long pulse of 10-15 msec duration. Harder materials produce shorter pulses of 1-5 msec duration. Some unusual pulse shapes can also be generated, depending on the resilience of the intermediate material. Pulse shapes for some typical materials are shown in Figure 3.","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134060382","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}

{"title":"Synthesis and Characterization of PZN-PT Materials","authors":"S. Winzer, A. Bailey, A. Ritter, I. Jawed","doi":"10.1109/ISAF.1986.201176","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201176","url":null,"abstract":"Compositions near the morphotropic boundary in the Pb(Zn1/3Nb2/3)03-PbTiO3 system were synthesized from the melt and analyzed. Up to four mol% variation in the PbTi03 component was found in meltsynthesized crystals, and both rhombohedral and tetragonal phases coexist in the region n ear the morphotropic boundary defined by earlier researchers. Powders made from the melt-synthesized crystals were used to make ceramics. Compositions of individual grains in the ceramics are the same as those of the starting powders, and up to 85% of the perovskite phase remains after firing. Individual grains of ZnO appear at grain boundaries, w ith or without a lead-rich phase, depending on the synthesis conditions. A pyrochlore phase forms that is not generally a ssociated with PbO or ZnO phases and is more concentrated n ear the outer surfaces of the ceramic pellets. Electrical properties are presented and possible approaches to increasing the amount of perovskite are discussed. INTRODUCT ION","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115226665","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}

{"title":"Application of Conductive Power Technology to the Production of a Novel Multiayer Capacitor","authors":"R. Selwood, D. Mandelblatt","doi":"10.1109/ISAF.1986.201236","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201236","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"44 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114130628","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}

{"title":"Investigation of Linear PTC Thermistors Based on (Ba-Sr)TiO3","authors":"Zhou Fangquiao, Chen Zhiziong, Meng Yuan, Li Xingjiao","doi":"10.1109/ISAF.1986.201232","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201232","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123072435","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}