Proceedings of the Korean Society Of Semiconductor Equipment Technology (한국반도체및디스플레이장비학회:학술대회논문집)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Crystallization and Electrical Properties of $Ba_2TiSi_2O_8$ Glass-Ceramics from $K_2O-BaO-TiO_2-SiO_2$ System

  • Chae, Su-Jin (Dept of Materials Science & Engineering, Dankook University) ;
  • Lee, Hoi-Kwan (Institute of Mew Materials Technology, Dankook University) ;
  • Kang, Won-Ho (Institute of Mew Materials Technology, Dankook University)
  • Published : 2006.10.12
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Abstract

Dielectric properties of glass-ceramics with fresnoite(Ba2TiSi208) crystals have been investigated in xK20-(33.3-x)BaO-16.7TiO2-50SiO2 ($0{\leq}x{\leq}20mol%$) glasses. The glassy nature was analyzed by differential thermal analyses and glass-ceramics was variable and control table by the processing parameters like time and temperature. Dielectric constant was measured over a temperature from 125K to 425k at frequencies form 100Hz to 1MHz, and laid in the range 16-10. Piezoelectric constant d33 was measured using a YE2703A d33meter and changed from 5.9 to 4.8pCN-1 with x contents. The spontaneous polarization Ps estimated from the hysteresis at ${\pm}1.2kV$ was ${\sim}0.3\;{\mu}C/cm2$ at room temperature.

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