Articles
  • Effect of sintering temperatures on electrical properties of 0.95(Na0.5K0.5) NbO3-0.05(Ba0.5Sr0.5)(Ti0.95Sn0.05)O3 lead-free ceramics 
  • In-Ho Ima, Seung-Hwan Leeb, Hong-Ki Kimb, Dong-Hyun Leeb, Seung-Hyun Kimb, Ye-Sol Yunb, Youn-Kyu Choid and Sung-Pill Namc,*
  • a Dept. of Electrical Engineering, Shin Ahnsan University, Gyeonggi-do, Korea b Dept. of Electronics Materials Engineering, Kwangwoon University, Seoul, Korea c Advanced Power Grid Research Division, Korea Electrotechnology Research Institute, Changwon-Si, Korea d LCR Division, Samsung Electro-Mechanics Co, Gyeonggi-do, Korea
Abstract
In this study, we fabricated the 0.95(Na0.5K0.5)NbO3-0.05(Ba0.5Sr0.5)(Ti0.95Sn0.05)O-3(here after NKN-BSTS) lead free ceramics by conventional solid state reaction method. The effects of sintering temperatures on electrical properties were investigated in detail. The NKN-BSTS ceramics sintered at 1080 degrees C similar to 1120 degrees C. The poling temperature and electric field cause superior piezoelectric properties of NKN-BSTS ceramics and the piezoelectric properties were shown the highest value at optimum sintering temperature. The NKN-BSTS ceramics sintered at 1100 degrees C show an optimal performance with dielectric constant was 4485, electromechanical coupling constant was 0.37 and the piezoelectric constant was 213 rho C/N. Therefore, it is believed that the NKN-BSTS ceramics is a candidate material with good prospect to make lead-free piezoelectric ceramics.

Keywords: NKN-BSTS; Lead-free; Poling; Piezoelectric constant; Sintering temperature

This Article

  • 2014; 15(1): 26-29

    Published on Feb 28, 2014

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