Differences between copper-oxide- and zinc-oxide-doped sodium potassium niobate ceramics

Song Ling Yang, Cheng Che Tsai, Yi Cheng Liou, Cheng Shong Hong, Han Chang Chen, Sheng Yuan Chu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


(Na 0.5K 0.5)NbO 3is doping with ZnO and CuO, respectively, (NKNZx and NKNCx, where x = 0-1 mol%) using a two-step calcination process (BO method). The X-ray diffraction profiles of NKNZx ceramics show a few secondary phases because Zn 2+ ions cannot substitute Nb 5+ ions. Moreover, the binding energies of Nb atoms in CuO- and ZnO-doped NKN ceramics are different, suggesting that oxygen vacancies were induced when CuO was doped into NKN ceramics. The mechanical quality factor (Q m) values of the NKNZx ceramics are not as high as those of NKNCx ceramics due to a lack of oxygen vacancies in the former. The internal bias field is used to demonstrate the presence of oxygen vacancies. In ZnO-doped NKN ceramics, the piezoelectric properties only improved slightly because ZnO used as a sintering aid enhanced the densification of samples. A high Q mvalue is obtained for CuO-doped NKN ceramics mainly due to the formation of oxygen vacancies.

Original languageEnglish
Pages (from-to)2110-2112
Number of pages3
JournalJournal of the American Ceramic Society
Issue number7
Publication statusPublished - 2012 Jul

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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