{"title":"高各向异性压电陶瓷及其在超声探头中的应用","authors":"H. Takeuchi, S. Jyomura, C. Nakaya","doi":"10.1109/ULTSYM.1985.198582","DOIUrl":null,"url":null,"abstract":"New piezoelectric ceramics with extremely large electromechanical anisotropies are reviewed. They are modified lead titanate ceramics (Pb.Sm) (Ti,Mn)Oj and (Pb,Ca)(Ti,(Col/ 2W1/2)03 +MnO.NiO and lead zirconate ceramics modified by adding small amounts of Pb(CERAmnl/3 Nb2/3 )O3 and PbTiOj. In these ceramics, the planar electromechanical coupling factor kp is much less than the thickness dilatational electromechanical coupling factor kt (kt/kp >lo). These ceramics are especially useful for use in high-frequency array transducers. In contrast to ordinary ceramics such as PZT, the width-to-thickness ratio of a transducer element (w/t) can be larger than unity. The features of a high-frequency linear array and of single element ultrasonic probes employing modified lead titanate ceramics are also described.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"26 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":"{\"title\":\"Highly Anisotropic Piezoelectric Ceramics and Their Application in Ultrasonic Probes\",\"authors\":\"H. Takeuchi, S. Jyomura, C. Nakaya\",\"doi\":\"10.1109/ULTSYM.1985.198582\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"New piezoelectric ceramics with extremely large electromechanical anisotropies are reviewed. They are modified lead titanate ceramics (Pb.Sm) (Ti,Mn)Oj and (Pb,Ca)(Ti,(Col/ 2W1/2)03 +MnO.NiO and lead zirconate ceramics modified by adding small amounts of Pb(CERAmnl/3 Nb2/3 )O3 and PbTiOj. In these ceramics, the planar electromechanical coupling factor kp is much less than the thickness dilatational electromechanical coupling factor kt (kt/kp >lo). These ceramics are especially useful for use in high-frequency array transducers. In contrast to ordinary ceramics such as PZT, the width-to-thickness ratio of a transducer element (w/t) can be larger than unity. The features of a high-frequency linear array and of single element ultrasonic probes employing modified lead titanate ceramics are also described.\",\"PeriodicalId\":240321,\"journal\":{\"name\":\"IEEE 1985 Ultrasonics Symposium\",\"volume\":\"26 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"13\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE 1985 Ultrasonics Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ULTSYM.1985.198582\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE 1985 Ultrasonics Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1985.198582","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Highly Anisotropic Piezoelectric Ceramics and Their Application in Ultrasonic Probes
New piezoelectric ceramics with extremely large electromechanical anisotropies are reviewed. They are modified lead titanate ceramics (Pb.Sm) (Ti,Mn)Oj and (Pb,Ca)(Ti,(Col/ 2W1/2)03 +MnO.NiO and lead zirconate ceramics modified by adding small amounts of Pb(CERAmnl/3 Nb2/3 )O3 and PbTiOj. In these ceramics, the planar electromechanical coupling factor kp is much less than the thickness dilatational electromechanical coupling factor kt (kt/kp >lo). These ceramics are especially useful for use in high-frequency array transducers. In contrast to ordinary ceramics such as PZT, the width-to-thickness ratio of a transducer element (w/t) can be larger than unity. The features of a high-frequency linear array and of single element ultrasonic probes employing modified lead titanate ceramics are also described.
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