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URN etd-0515106-163030 Statistics This thesis had been viewed 3087 times. Download 641 times. Author Chih-Yen Chen Author's Email Address email@example.com Department Materials Engineering Year 2005 Semester 2 Degree Ph.D. Type of Document Doctoral Dissertation Language zh-TW.Big5 Chinese Page Count 131 Title The Study of Pb(Mn1/3Nb2/3)O3-PZ-PT with lower sintering temperature Keyword PZT PZT Abstract Ferroelectric ceramics have long been used as sensors and actuators due to their piezoelectric properties [1,2]. They are capable of high frequency response and are thus ideal for ultrasonic applications. However, the strain available is limited, and clever mechanical devices have been invented to amplify the strain. Recently, attention has focused on developing materials capable of large strains. Coupled with the recent interest in ferroelectric memories [3,4], the last decade has been one of significant advances. New materials have been developed and systematic attempts to manipulate domains have been pursued. New experimental methods have probed the material at the atomistic and domain scales. Significant advances have been made in the theoretical understanding of the origins of ferroelectricity, the nature of domain patterns and the overall behavior of materials. Modern methods of synthesis with controlled texture and composition have opened the possibility of exploiting the inherent microscopic features of these materials. This paper reviews the recent theoretical and experimental advances, and comment on opportunities and challenges for the future. Rather than attempt a comprehensive survey, we provide some snapshots of the recent developments. A variety of materials have been found to exhibit ferroelectricity [5,6,7].
The best piezoelectric property is given for the sample venting 800oC for 1 hour and sintering at 1050oC for 1 hour at 10mtorr. The value of Qm can be reached to 2100 and kp can maintain 0.610. The sintering temperature is apparently lower than the traditional sintering. The piezoelectric of Qm and kp are also improved.
Advisor Committee none - advisor
none - co-chair
Files Date of Defense 2005-09-01 Date of Submission 2006-05-15