Sixth IEEE International Symposium on Applications of Ferroelectrics最新文献

{"title":"V2O3Composite Thermistors","authors":"D. Moffatt, J. Runt, A. Safari, R. Newnham","doi":"10.1109/ISAF.1986.201231","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201231","url":null,"abstract":"The semiconductor lo metal phase transition found in vanadium (Ill) oxide, V 0 , was incorporated into a composite thermistor which exhibits an NTC as well as a PTC resistance effect. The composites were prepared using V O3 and several polymers including a flexible epoxy, a polyurekane and crystalline polyethylene. These composites showed large PTC resistivity effects of up to eight orders of magnitude. Depending on the type of polymer chosen, the transition !emperature at which the PTC phenomenon occurs can be changed. In addition, an NTC effect was observed at the temperature of the semiconductor to metal transition of the metal oxide filler. The resistivity versus temperature curve resembles a square well with three different conducting ranges: semiconductor to metal to insulator. Finally, the percolation curves for polyethylene composites were found to be a lunction of filler particle size z 3","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"1 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":"130426253","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":"Dielectric and Microstructural Properties of Barium Strontium Titanate Ceramics Prepared from Citrate Precursors","authors":"P. Osbond, N. Payne, N. M. Shorrocks, R. Whatmore, F. Ainger","doi":"10.1109/ISAF.1986.201155","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201155","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":"130750131","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":"Growh and Dielectric Properties of Lead Barium Niobate Single Crystals and Morpeotropic Phase Boundary","authors":"M. Adachi, S. Sankar, A. Bhalla, Z. Chang, L. E. Cross","doi":"10.1109/ISAF.1986.201120","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201120","url":null,"abstract":"S i n g l e c r y s t a l s of l e a d bar ium n i o b a t e (PBN) b e l o n g i n g t o t h e t e t r a g o n a l t u n g s t e n b r o n z e s t r u c t u r e s p o s s e s s many d e s i r a b l e p r o p e r t i e s f o r p o t e n t i a 1 a p p l i c a t i o n s i n e 1 e c t r o o p t i c , p i e z o e l e c t r i c a n d p y r o e l e c t r i c d e v i c e s . I n t h e s o l i d s o l u t i o n PbNb206-BaNb206, s u b s t i t u t i o n o f b a r i u m f o r l e a d f i r s t d e c r e a s e s t h e o r t h o r h o m b i c d i s t o r t i o n and l a t e r s t a b i l i z e s t h e t e t r a g o n a l s t r u c t u r e . A morphot ropic phase boundary e x i s t s a t about Pb0.6Ba0.4Nb206. Cur ren t unde r s t and ing based on p h e n o m e n o l o g i c a l c a l c u l a t i o n s o n r e l a t e d m a t e r i a 1 s i n d i c a t e t h a t e 1 e c t r o o p t i c a n d d i e l e c t r i c p r o p e r t i e s o f PBN s h o u l d e x h i b i t c o n s i d e r a b l e e n h a n c e m e n t n e a r t h e m o r p h o t r o p i c p h a s e b o u n d a r y and t h a t t h e y s h o u l d b e l a r g e l y t e m p e r a t u r e i n d e p e n d e n t o v e r a r e a s o n a b l y l a r g e r a n g e o f t e m p e r a t u r e . A s a r e s u l t o f t h i s m o t i v a t i o n , we h a v e grown s i n g l e c r y s t a l s o f PblBaXNb2O6 e m p l o y i n g C z o c h r a l s k i t e c h n i q u e . R e s u f t s o f d i e l e c t r i c c o n s t a n t of two compos i t ions i n t h e o r t h o r h o m b i c s t r u c t u r e w i t h x = 0.37 and 0 . 4 0 a n d one c o m p o s i t i o n i n t h e t e t r a g o n a l s t r u c t u r e w i t h x = 0.65 a r e r e p o r t e d i n t h i s paper. These r e s u l t s l a r g e l y conf i rm t h e p r e d i c t i o n s made by t h e phenomenologica l thermodynamic theory .","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"128 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":"132874594","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":"Pulse Driving Method of Piezoelectric Actuators","authors":"S. Sugiyama, K. Uchino","doi":"10.1109/ISAF.1986.201223","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201223","url":null,"abstract":"Dynamical ana lys i s o f p i e z o e l e c t r i c ac tua to rs has been s tud ied f o r a s tep o r a pu l se vo l tage applied. The s t r a i n induced i s , i n general, associated w i t h an overshoot and r i n g i n g . When the r i s e t ime f o r t he vo l tage i s a p p r o p r i a t e l y ad justed ( i .e. e q u a l l y t o t h e resonance per iod) , t h i s r i n g i n g i s r a d i c a l l y reduced. To suppor t t he analys is , t h e experiment has been made by us ing a bimorph-type actuator .","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"28 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":"133300895","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":"Theoretical Electrical Power Output Per Unit Voume of PVF2and Mechanical-To-Electrical Conversion Efficiency as Functions of Frequency","authors":"V. Schmidt","doi":"10.1109/ISAF.1986.201201","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201201","url":null,"abstract":"The e lectr ical energy ou tpu t per u n i t volume of po ly(v iny1idene f l u o r i d e ) (PVF2) i s c a l c u l a t e d us ing t h e d31 p i e z o e l e c t r i c c o e f f i c i e n t a p p l i c a b l e t o t h e bimorph bending mode of o p e r a t i o n S t r a i n s approach ing t h e y i e l d s t r a i n a r e considered. The c a p a c i t i v e p o r t i o n of t he source impedance i s assumed t o be c a n c e l l e d by a s u i t a b l e series induc to r . L i m i t a t i o n s caused by e l e c t r i c a l breakdown a r e cons ide red , because t h i s L C resonance effect can cause v o l t a g e s a c r o s s the sample g r e a t l y i n e x c e s s of t h e emf g e n e r a t e d d i r e c t l y by t h e bending, A t s e r i e s resonance , t h e power o u t p u t i s l i m i t e d by t h e r e s i s t i v e p a r t s of t h e PVF2 i n t e r n a l impedance and t h e i n d u c t o r impedance. The o u t p u t power per u n i t volume is c a l c u l a t e d from pub l i shed v a l u e s fo r t h e f r equency dependence of t h e l o s s y part of t h e p e r m i t t i v i t y f o r WF2. d e n s i t y is s u r p r i s i n g l y l a r g e a t f r e q u e n c i e s i n t h e Wz range just below t h e f r e q u e n c i e s a t which losses become l a r g e , and i s c a l c u l a t e d t o be a b o u t 100 W/cm3 a t 1 kHz. Also, t h e mechanica l toe l e c t r i c a l conve r s ion e f f i c i e n c y i s c a l c u l a t e d . Th i s e f f i c i e n c y c a n exceed t h e e? .ec t romechanica l coup l ing c o e f f i c i e n t of a b u t 1% cons ide rab ly . I ts c a l c u l a t e d v a l u e n e a r 70% is l i m i t e d o n l y by e l e c t r i c a l and mechan ica l losses. T h i s power FERTIN EN T MATERIAL PR O E R TIES A p i e z o e l e c t r i c polymer h a s seven i m p o r t a n t des ign parameters f o r purposes o f o b t a i n i n g t h e greatest p o s s i b l e e l e c t r i c a l o u t p u t and e f f i c i e n c y from a mechanica l d r i v i n g source. The mechanica l Y' p a rame te r s a r e Young's modulus Y, y i e l d s t r a i n 6 and mechanica l q u a l i t y f a c t o r Qm, w h i l e t h e e l e c t r i c a l ones a r e d i e l e c t r i c p e r m i t t i v i t y K. e l e c t r i c breakdown f i e l d E& and e l e c t r i c a l q u a l i t y f a c t o r 9,. The s e v e n t h i s the p i e z o e l e c t r i c c o e f f i c i e n t d31 r e l a t i n g e l e c t r i c f i e l d a c r o s s t h e s h e e t ( 3 d i r e c t i o n ) t o s t r a i n a l o n g the stretch d i r e c t i o n (1) w i t h i n t h e shee t . Young's modulus f o r PVFZ i s t h e r a t i o of t e n s i l e stress t o t e n s i l e s t r a i n which i s quoted' a s Y=1.5x109 N / m 2 or 2 . 2 ~ 1 0 ~ p s i . w i t h our own measuremen t s2 Young's modulus i s a measure of s t i f f n e s s , which i s low f o r p l a s t i c s , a l l o w i n g d e s i g n s w h i c h g i v e t h e necessa ry f l e x i b i l i t y f o r coup l ing e f f i c i e n t ","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"72 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":"123012769","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":"Device Characteristics of Ferroelectric Ceramic KNO3Thin-Film Raw Memories","authors":"J. Scott, R. Godfrey, C. Araujo, L. Mcmillan, H. Meadows, M. Golabi","doi":"10.1109/ISAF.1986.201207","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201207","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"46 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":"129191646","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":"Grain and Grain Boundry Resistivities of Mn-Doped Semiconducting BaTiO3","authors":"N. Cipollini, J. M. Sowa, C. E. Forbes, J. F. Lynch","doi":"10.1109/ISAF.1986.201229","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201229","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"21 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":"129368234","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":"Dielectric Aging Effects in Doped Lead Magnesium Niobate: Lead Titanate Relaxor Ferroelectric Ceramics","authors":"W. Pan, G. Dayton, L. Cross","doi":"10.1109/ISAF.1986.201225","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201225","url":null,"abstract":"contribute to aging in normal macro-domain ferroelectrics No obvious dielectric aging effects have been observed in pure .9Pb(Mgl13Nb2,3)03:. 1PbTi03 relaxor ferroelectric ceramics in this study. The addition of small amounts of MnO however, induces aging effects. Aging effects preferentially reduce the dispersive component of the weak field permittivities above the aging temperature. Isothermal aging rates are observed to increase with increasing doping level. Dielectric constants vs the logarithm of time at constant temperature level out with time. The origin of aging for this type of relaxor material can be explained in terms of the volume stabilization of the polar vectors in polar micro-regions by the defect dipoles introduced by the doping.","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"227 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":"115835700","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":"Ferroelectric Liquid Crystals: Properties of Real Structures","authors":"J. Fousek, L. Lejček","doi":"10.1109/ISAF.1986.201127","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201127","url":null,"abstract":"","PeriodicalId":302681,"journal":{"name":"Sixth IEEE International Symposium on Applications of Ferroelectrics","volume":"106 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":"116663485","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":"Processing, Microstructure and Properties of Grain-Oriented Ferroelectric Ceramics","authors":"K. Okazaki, H. Igarashl, K. Nagata, T. Yamamoto, S. Tashiro","doi":"10.1109/ISAF.1986.201152","DOIUrl":"https://doi.org/10.1109/ISAF.1986.201152","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":"115248629","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}