Synthesis of Na0.5K0.5NbO3 Piezoelectrics by a Solution Coating Approach |
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| Authors: | Huidong Li Wei-Heng Shih Wan Y Shih |
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| Affiliation: | Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104;
School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, PA 19104 |
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| Abstract: | The solution coating method is shown to provide more homogeneous mixing of the starting powders and purer (Na0.5K0.5)NbO3 (NKN) powder than the conventional method thereby rendering cold isostatic pressing unnecessary. Sintering NKN with potassium copper niobate (KCN) by uniaxial pressing gave a relative bulk density of 92%, d 33 coefficient of 112 pC/N and a loss factor of 1% after 6 h at 1100°C. In contrast, the conventional method yielded 84% relative bulk density and a 31% loss factor after 6 h at 1100°C and the sample was too porous to allow for dielectric and piezoelectric measurements. |
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