Prediction the morphotropic phase boundary composition in (Bi 0.5Na0.5)TiO3-based lead-free piezoelectric ceramics

Wei Chih Lee, Chi Yuen Huang, Liang Kuo Tsao, Yu Chun Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A quantitative relation between the morphotropic phase boundary (MPB) composition and the tolerance factor (t) in (Bi0.5Na 0.5)TiO3 (BNT)-based piezoelectric ceramics was established. The t value of the MPB compositions in BNT-based ceramics are around 0.990 ̃ 0.993 and is independent of the types of added compounds. In order to experimentally demonstrate it, two piezoelectric ceramic systems (l-x)(Bi0.5Na0.5)TiO3-x(Bal-aSr a)TiO3, a = 0.05 and 0.3 (BNBST5-X and BNBST30-X, x < 12%), were used. The X-ray diffraction patterns and dielectric properties measurements indicated that the MPB compositions were BNBST5-6 and BNBST30-8 and their corresponding t value were 0.9900 and 0.9903, respectively. The results confirm the relation between the MPB composition and t value and provide a method for designing new piezoelectric materials.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition MS and T'08
Pages112-121
Number of pages10
Publication statusPublished - 2008 Dec 1
EventMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
Duration: 2008 Oct 52008 Oct 9

Publication series

NameMaterials Science and Technology Conference and Exhibition, MS and T'08
Volume1

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
CountryUnited States
CityPittsburgh, PA
Period08-10-0508-10-09

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials

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