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[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics最新文献

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Pulsed laser deposition of ferroelectric bismuth titanate 铁电钛酸铋的脉冲激光沉积
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200213
H. Buhay, S. Sinharoy, W.H. Kasner, M.H. Francombe, D. Lampe, E. Stepke
{"title":"Pulsed laser deposition of ferroelectric bismuth titanate","authors":"H. Buhay, S. Sinharoy, W.H. Kasner, M.H. Francombe, D. Lampe, E. Stepke","doi":"10.1109/ISAF.1990.200213","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200213","url":null,"abstract":"Stoichiometric bismuth titanate films were prepared on MgO, Si, and Pt-coated Si by the technique of pulsed excimer laser deposition. This technique is a high-energy process with the potential to form the ferroelectric phase at a lower temperature than by sputtering. Fiber textured films were obtained on MgO [110] with preferred c-axis orientation. Polycrystalline films were obtained on Si [100] and Pt-coated Si at a temperature as low as 500 degrees C. The estimated saturation polarization and coercive field measured for the films were 28.0 mu C/cm/sup 2/ and 200 kV/cm, respectively. Also important from an integrated silicon device point of view, the as-deposited films had few particulates and were crack-free without the need for a postdeposition anneal. Results of attempts to integrate the films prepared in this manner in a FET memory structure are outlined.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123517528","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: 1
Piezoelectric revolving motors applicable for future purpose 可用于未来用途的压电旋转电机
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200227
A. Kumada
{"title":"Piezoelectric revolving motors applicable for future purpose","authors":"A. Kumada","doi":"10.1109/ISAF.1990.200227","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200227","url":null,"abstract":"The principle of a battery driven and IC-controlled m-watt ultrasonic motor called the Kumada motor, and its applications are outlined. The Kumada motor is based on a stator consisting of a piezoelectric revolving resonator. Its center of mass rotates around the geometric center drawing a circle a few micrometers in radius, at a very high speed of about several million revolutions per minute. The revolving motion is excited with a four-phase rotating voltage with a frequency of several tens of kilohertz. The stator of the motor has several kinds of shapes. An advantage offered by this motor is the concept of direct drive. As an example a novel type of clock is described with minute and hour hands driven independently and directly by two stators without gears and pivots.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125750318","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: 3
Electrical and optical properties of RF sputtered zinc oxide films 射频溅射氧化锌薄膜的电学和光学性能
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200354
A. Arora, R. Srivastava, A. Mansingh
{"title":"Electrical and optical properties of RF sputtered zinc oxide films","authors":"A. Arora, R. Srivastava, A. Mansingh","doi":"10.1109/ISAF.1990.200354","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200354","url":null,"abstract":"Zinc oxide films were deposited by RF sputtering using an oxide target with a room-temperature substrate. Dry air and argon were used as ambients. The target-to-substrate (T-S) distance was varied between 3 cm and 7 cm. The as-grown films were highly resistive and there was no marked difference in the electrical, optical, and structural properties for the films grown at different (T-S) distances and in different ambients.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124620220","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: 1
Dielectric properties of liquid phase sintered Pb(Mg/sub 1/3/Nb/sub 2/3/)/sub 1-x/Zr/sub x/O/sub 3/ ceramics 液相烧结Pb(Mg/sub 1/3/Nb/sub 2/3/)/sub 1-x/Zr/sub x/O/sub 3/陶瓷的介电性能
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200312
Gung-Fu Chen, S. Cheng, Chien-min Wang
{"title":"Dielectric properties of liquid phase sintered Pb(Mg/sub 1/3/Nb/sub 2/3/)/sub 1-x/Zr/sub x/O/sub 3/ ceramics","authors":"Gung-Fu Chen, S. Cheng, Chien-min Wang","doi":"10.1109/ISAF.1990.200312","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200312","url":null,"abstract":"Liquid phase sintering of Pb(Mg/sub 1/3/Nb/sub 2/3/)/sub 1-x/Zr/sub x/O/sub 3/ ceramics (PMN/sub 1-x/PZ/sub x/) was carried out via the fluxing agents of Bi/sub 2/O/sub 3/Li/sub 2/O and PbO. The sintering temperature of PMN/sub 1-x/PZ/sub x/ could be lowered from 1300 degrees C to less than 1000 degrees C. Besides acting as a liquid-phase fluxing agent, both Bi/sub 2/O/sub 3//Li/sub 2/O and PbO behave as a Curie shifter and depressor. Bi/sub 2/O/sub 3//Li/sub 2/O decreases the Curie temperature of PMN/sub 1-x/PZ/sub x/, while PbO shifts the Curie temperature in an upward manner. The relaxation characteristics of PMN/sub 1-x/PZ/sub x/ were enhanced with the incorporation of Bi/sub 2/O/sub 3//Li/sub 2/O. PbO cannot relax and therefore can only slightly broaden the dielectric maximum region of PMN/sub 1-x/PZ/sub x/. The effects of Bi/sub 2/O/sub 3//Li/sub 2/O and PbO on the dielectric properties of PMN/sub 1-x/PZ/sub x/ were also investigated.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129882604","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: 1
Dielectric and pyroelectric properties of a new family of modified polypeptide films 一类新型改性多肽薄膜的介电和热释电性质
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200341
D. Damjanovic, A. Bhalla, L. Cross, S. Erhan, A. Reddy
{"title":"Dielectric and pyroelectric properties of a new family of modified polypeptide films","authors":"D. Damjanovic, A. Bhalla, L. Cross, S. Erhan, A. Reddy","doi":"10.1109/ISAF.1990.200341","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200341","url":null,"abstract":"The dielectric and pyroelectric properties of gelatin-based synthetic polypeptides were studied for possible sensor applications. Among the compositions examined, gelatin films modified with triglycerol were found to have particularly interesting properties. The films exhibited a strong dispersion in the dielectric permittivity accompanied by a high dielectric loss near room temperature. The possible relaxational mechanisms responsible for the observed dielectric behavior are discussed. The pyroelectric properties of the films were investigated. The measurements performed on prepoled samples proved the presence of a true, reversible pyroelectric response in the films. The value of the pyroelectric coefficient of the films was found to be comparable to that of PVDF polymer.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128374451","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
Formation of organic ferroelectric thin films by vacuum evaporation under electric field 电场作用下真空蒸发形成有机铁电薄膜
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200342
T. Horiuchi, Y. Yoshida, K. Matsushige
{"title":"Formation of organic ferroelectric thin films by vacuum evaporation under electric field","authors":"T. Horiuchi, Y. Yoshida, K. Matsushige","doi":"10.1109/ISAF.1990.200342","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200342","url":null,"abstract":"Crystal structures and molecular orientation in the ferroelectric polymer of polyvinylidene fluoride, PVDF, evaporated with and without an electric field were investigated. In order to evaluate the molecular structures in the thin films formed on a SiO/sub 2/ glass substrate, a newly developed energy dispersive total reflection X-ray diffractometer was successfully utilized. Anomalous lamellae structures in evaporated PVDF thin films and the changes induced by the heat treatment were observed. It was revealed that the molecules which have a dipole moment perpendicular to the molecular axis can be controlled by the application of the electric field during the evaporation process.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128660735","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
Fabrication of Pb(Mg,Nb)O/sub 3/ ceramics using a hydrothermally synthesized powder and their evaluations 水热粉末制备Pb(Mg,Nb)O/sub 3/陶瓷及其评价
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200309
T. Yamamoto, Y. Shimizu, M. Watanabe
{"title":"Fabrication of Pb(Mg,Nb)O/sub 3/ ceramics using a hydrothermally synthesized powder and their evaluations","authors":"T. Yamamoto, Y. Shimizu, M. Watanabe","doi":"10.1109/ISAF.1990.200309","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200309","url":null,"abstract":"Hydrothermally synthesized powder processing and dielectric properties are reported for lead magnesium niobate (PbMg/sub 1/3/Nb/sub 2/3/O/sub 3/) ceramics. Dielectric constants above 17000 at the Curie point and 1 kHz in pure PMN and PMN-excess range MgO were achieved at sintering temperatures from 900 to 1300 degrees C and exhibited gradually increased values in spite of the clear increase both in sintering temperature and MgO.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127330787","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
Sintering mechanism of LiTaO/sub 3/ ceramics by the addition of lithium and magnesium fluorides 氟化锂和氟化镁对LiTaO/sub - 3陶瓷烧结机理的影响
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200315
Z. Ye, R. von der Muhll, J. Ravez
{"title":"Sintering mechanism of LiTaO/sub 3/ ceramics by the addition of lithium and magnesium fluorides","authors":"Z. Ye, R. von der Muhll, J. Ravez","doi":"10.1109/ISAF.1990.200315","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200315","url":null,"abstract":"Highly densified LiNbO/sub 3/ and LiTaO/sub 3/ ceramics were obtained by sintering in a moist atmosphere in the presence of LiF and MgF/sub 2/. The sintering mechanism of LiTaO/sub 3/ ceramics at low temperatures in the presence of LiF and MgF/sub 2/ is reported. The sintering temperatures were decreased by 300 degrees C for LiNbO/sub 3/ and 500 degrees C for LiTaO/sub 3/. An open air sintering mechanism based on the partial hydrolysis of the starting fluorides and the formation of an intermediate Mg/sub 4/M/sub 2/X/sub 9/-type (M=Li,Ta; X=O,F,OH) hydroxofluoride phase is proposed, and a three-stage reactional sketch is given.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132014356","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: 1
Real time densification of barium titanate using gas isostatic hot pressing 采用气体等静压热压技术实时致密化钛酸钡
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200316
J. Sundeen, W. Schulze, R. Speyer
{"title":"Real time densification of barium titanate using gas isostatic hot pressing","authors":"J. Sundeen, W. Schulze, R. Speyer","doi":"10.1109/ISAF.1990.200316","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200316","url":null,"abstract":"A gas hot isostatic press (HIP) with a dilatometer was used to study the densification of barium titanate in real time. Temperature, pressure, and linear shrinkage were monitored in real time by a computer. This allowed a study of sintering and gas isostatic hot pressing of barium titanate in only a few runs. Postsinter HIP and sinter HIP runs were performed at pressures of 20 MPa and temperatures of 1300-1350 degrees C. Enhanced densification through gas isostatic hot pressure was demonstrated.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130963461","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
Relaxor ceramic dielectric materials for multilayer ceramic capacitors 多层陶瓷电容器用弛豫陶瓷介电材料
[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI: 10.1109/ISAF.1990.200233
Y. Yamashita
{"title":"Relaxor ceramic dielectric materials for multilayer ceramic capacitors","authors":"Y. Yamashita","doi":"10.1109/ISAF.1990.200233","DOIUrl":"https://doi.org/10.1109/ISAF.1990.200233","url":null,"abstract":"The formation of a perovskite structure of lead zinc niobate (PZN) has been accomplished by multi-ion substitution. Nine different low-firing-type dielectric materials for a multilayer ceramic capacitor, based on modified PZN with K values ranging from 18000 to 400, were developed. The PZN-based dielectrics have 1.5 times larger K values in the same temperature coefficient of capacitance, high electrical resistivity, low dissipation factor, and low DC bias dependency, compared to conventional BaTiO/sub 3/-based dielectrics.<<ETX>>","PeriodicalId":269368,"journal":{"name":"[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131338308","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: 5
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