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Title: Improvement in synthesis of (K 0.5Na 0.5)NbO 3 powders by Ge 4+ acceptor doping

In this study, the effects of doping with GeO 2 on the synthesis temperature, phase structure and morphology of (K 0.5Na 0.5)NbO 3 (KNN) ceramic powders were studied using XRD and SEM. The results show that KNN powders with good crystallinity and compositional homogeneity can be obtained after calcination at up to 900°C for 2 h. Introducing 0.5 mol.% GeO 2 into the starting mixture improved the synthesis of the KNN powders and allowed the calcination temperature to be decreased to 800°C, which can be ascribed to the formation of the liquid phase during the synthesis.
Authors:
 [1] ;  [2] ;  [1]
  1. North China Electric Power Univ., Beijing (China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Frontiers of Materials Science
Additional Journal Information:
Journal Volume: 10; Journal Issue: 4; Journal ID: ISSN 2095-025X
Publisher:
Springer
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; lead-free piezoelectrics; potassium sodium niobate; synthesis; acceptor doping
OSTI Identifier:
1356911