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

研究成果: Article

6 引文 斯高帕斯(Scopus)

摘要

(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.

原文English
頁(從 - 到)2110-2112
頁數3
期刊Journal of the American Ceramic Society
95
發行號7
DOIs
出版狀態Published - 2012 七月 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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