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Low Temperature Sintering in 95(Na0.5K0.5)NbO3-5LiTaO3 Ceramics

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Abstract:

Na2O excess 95(Na0.5K0.5)NbO3-5LiTaO3 (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding Na2O as a sintering aid. Grain growth behaviors with Na2O addition were explained in terms of the effect of Na2O on interface reaction - controlled grain growth and the critical driving force. The electrical properties of NKN-5LT ceramics were investigated as a function of Na2O concentration. In the 1 mol% Na2O excess NKN-5LT samples sintered at 1000oC for 4h in air, electromechanical coupling factor (kP) and piezoelectric coefficient (d33) of NKN-5LT ceramics were found to reach the highest values of 0.43 and 190 pC/N, respectively.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

735-738

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.735

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Online since:

June 2007

Authors:

Min Soo Kim, Seok Oh, Dae Su Lee, Eon Cheol Park, Soon Jong Jeong, In Sung Kim, Jae Sung Song, Young Woo Oh

Keywords:

Lead-Free, Lithium Tantalate, Piezoelectric, Sodium Oxide, Sodium Potassium Niobate

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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