High performance of advanced composites based on relaxor-ferroelectric single crystals

V.Y. Topolov, C.R. Bowen, S.V. Glushanin

Research output: Chapter or section in a book/report/conference proceedingChapter or section

1 Citation (SciVal)


The outstanding electromechanical properties of single crystals of relaxor-ferroelectric solid solutions near the morphotropic phase boundary suggest that these materials can be regarded as potential components of high-performance piezo-active composites. In this chapter we discuss the advantages of using the relaxor-ferroelectric single crystals of solid solutions of (1-x)Pb(Mg1/3 Nb2/3)O3-xPbTiO3 and (1-y)Pb(Zn1/3Nb2/3)O3-yPbTiO3 as components of single crystal/polymer and single crystal/porous polymer composites of the 2-2 and 1-3 types. Examples of the high piezoelectric activity and sensitivity and large hydrostatic parameters of the aforementioned composites are analysed in connection with the electromechanical properties of the single-crystal component. The influence of the polarisation orientation on the effective electromechanical properties and related parameters of the single crystal/polymer composite are discussed for different connectivity patterns. Comparisons are made between the effective parameters of 2-2 connectivity composites based on polydomain single crystals and single-domain single crystals of the same chemical composition (for instance, 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3). Specific effective parameters of single crystal/polymer composites are compared to those of piezo-active composites based on the conventional ferroelectric ceramic and having the same connectivity pattern (either 2-2 or 1-3). In general, data presented in the chapter show how the relaxor-ferroelectric single-crystal component improves the effective parameters of the novel composites and promotes the formation of non-monotonic volume-fraction dependences of the effective parameters which are of particular interest for a variety of piezotechnical applications, such as active elements of sensors, actuators, transducers, hydrophones, etc.

Original languageEnglish
Title of host publicationPiezoceramic Materials and Devices
PublisherNova Science Publishers
Number of pages42
ISBN (Print)9781608764594
Publication statusPublished - 2010


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