Physical and Electrical Properties of Lead-Free (Na&lt;sub&gt;0.5&lt;/sub&gt;K&lt;sub&gt;0.5&lt;/sub&gt;)NbO&lt;sub&gt;3&lt;/sub&gt;-(Bi&lt;sub&gt;0.5&lt;/sub&gt;Na&lt;sub&gt;0.5&lt;/sub&gt;)TiO&lt;sub&gt;3&lt;/sub&gt; Ceramics

Chun Huy Wang

doi:10.4028/www.scientific.net/amr.201-203.2772

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Physical and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3-(Bi0.5Na0.5)TiO3 Ceramics

Chun Huy Wang

Year: 2011 Journal: Advanced materials research Vol: 201-203 Pages: 2772-2775 Publisher: Trans Tech Publications

DOI: 10.4028/www.scientific.net/amr.201-203.2772

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Abstract

Lead-free (1-x)(Na 0.5 K 0.5 )NbO 3-x (Na 0.5 Bi 0.5 )TiO 3 (x=0.02, 0.04, 0.06, 0.08, and 0.10) ceramics have been prepared by the conventional mixed oxide process. For 0.98(Na 0.5 K 0.5 )NbO 3 -0.02(Na 0.5 Bi 0.5 )TiO 3 ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.33 and 0.62, respectively, after sintering at 1100°C for 5 h. The ratio of the thickness coupling coefficient to the planar coupling coefficient is 1.88. Our results show that 0.98(Na 0.5 K 0.5 )NbO 3 -0.02(Na 0.5 Bi 0.5 )TiO 3 solid solution ceramics are promising lead-free ceramics for high-frequency electromechanical transducer applications.

Keywords:

Natural bond orbital Materials science Ceramic Electromechanical coupling coefficient Analytical Chemistry (journal) Sintering Coupling (piping) Solid solution Planar Mixed oxide Oxide Mineralogy Metallurgy Chemistry

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Physical and Electrical Properties of Lead-Free (Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub>-(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> Ceramics

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