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Sintering effect on microstructure and properties of (K,Na)NbO3 ceramics

Journal Article


Abstract


  • (K,Na)NbO 3 (KNN) lead-free ceramics were fabricated using conventional solid-state reaction method. The domain configurations were studied with transmission electron microscopy and found to be closely related to the sintering temperature and cooling rate. High density ceramics with uniform compositions were obtained when sintered at 1200°C with a slow cooling rate, resulting in the improved piezoelectric properties, with d 33 on the order of 150-160 pC/N, which is comparable to the hot pressed KNN ceramics. The microstructures of the ceramics synthesized at various conditions were explained in terms of the solid-solution characteristics of KNN system, based on the high temperature phase diagram. The relationship of processing parameter- microstructure-property established herein will lead to further improvements in the piezoelectric properties of KNN lead-free materials. © 2011 The American Ceramic Society.

UOW Authors


  •   Zhang, Shujun
  •   Lee, Hyeong Jae. (external author)
  •   Ma, Cheng (external author)
  •   Tan, Xiaoli (external author)

Publication Date


  • 2011

Citation


  • Zhang, S., Lee, H. Jae., Ma, C. & Tan, X. (2011). Sintering effect on microstructure and properties of (K,Na)NbO3 ceramics. Journal of the American Ceramic Society, 94 (11), 3659-3665.

Scopus Eid


  • 2-s2.0-80155174724

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2010

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 3659

End Page


  • 3665

Volume


  • 94

Issue


  • 11

Place Of Publication


  • United States

Abstract


  • (K,Na)NbO 3 (KNN) lead-free ceramics were fabricated using conventional solid-state reaction method. The domain configurations were studied with transmission electron microscopy and found to be closely related to the sintering temperature and cooling rate. High density ceramics with uniform compositions were obtained when sintered at 1200°C with a slow cooling rate, resulting in the improved piezoelectric properties, with d 33 on the order of 150-160 pC/N, which is comparable to the hot pressed KNN ceramics. The microstructures of the ceramics synthesized at various conditions were explained in terms of the solid-solution characteristics of KNN system, based on the high temperature phase diagram. The relationship of processing parameter- microstructure-property established herein will lead to further improvements in the piezoelectric properties of KNN lead-free materials. © 2011 The American Ceramic Society.

UOW Authors


  •   Zhang, Shujun
  •   Lee, Hyeong Jae. (external author)
  •   Ma, Cheng (external author)
  •   Tan, Xiaoli (external author)

Publication Date


  • 2011

Citation


  • Zhang, S., Lee, H. Jae., Ma, C. & Tan, X. (2011). Sintering effect on microstructure and properties of (K,Na)NbO3 ceramics. Journal of the American Ceramic Society, 94 (11), 3659-3665.

Scopus Eid


  • 2-s2.0-80155174724

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2010

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 3659

End Page


  • 3665

Volume


  • 94

Issue


  • 11

Place Of Publication


  • United States