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Dielectric properties of Ag-doped 0.94(K0.5Na0.5)NbO3-0.06LiNbO(3) ceramics prepared by templated grain growth
- Authors
- Park, Sang-Uk; Koh, Jung-Hyuk
- Issue Date
- Oct-2014
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Ceramics; Dielectricity; Impedance spectroscopy
- Citation
- MATERIALS RESEARCH BULLETIN, v.58, pp 69 - 73
- Pages
- 5
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 58
- Start Page
- 69
- End Page
- 73
- ISSN
- 0025-5408
1873-4227
- Abstract
- We have investigated the relaxation mechanism and dielectric properties of Ag-doped 0.94(K0.5Na0.5) NbO3-0.06LiNbO(3) lead-free piezoelectric ceramics prepared by the templated grain growth method using cubic (K,Na)NbO3 single crystal seeds as templates. Specimens were prepared by the conventional mixed oxide method and sintered in a controlled atmosphere. Since the templated grain growth method can increase the grain size by introducing the templates, the dielectric properties of the ceramics were improved. Various dielectric experiments were carried out to obtain information about the possible relaxation behavior and activation energies of the ceramics. Cole-Cole plots were made to investigate the relaxation mechanisms of the grains and grain boundaries in Ag-doped 0.94(K0.5Na0.5)NbO3-0.06LiNbO(3) ceramics. (C) 2014 Elsevier Ltd. All rights reserved.
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