Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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A Study on the Physical Properties of xB2O3-yBi2O3-zPbO-5SiO2 Glass System

xB2O3 -yBi2O3-zPbO-5SiO2계 유리의 전기적인 특성

  • Joung, Maeng Sig (Department of Ophthalmic Optics, Yeongdong College) ;
  • Ju, Kyung Bok (Department of Ophthalmic Optucs Science, Dongnam Health College) ;
  • Lee, Nam Han (Department of Ophthalmic Optics, Asia-Pacific Economic Research Institute)
  • 정맹식 (영동전문대학 안경광학과) ;
  • 주경복 (동남보건대학 안경광학과) ;
  • 이남한 (아태경제 연구원 안경부)
  • Published : 2001.06.30
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Abstract

The temperature dependence of dielectric constant and electrical conductivity for the BBPS glasses system was studied over a temperature range between $30^{\circ}C$ and $500^{\circ}C$ and at a frequency ranged from $10^3$ Hz to $10^7$ Hz. The dielectric constant ${\varepsilon}$ at room temperature of $xB_2O_3-yBi_2O_3-zPbO-5SiO_2 $ glasses was measured to be 15 at $10^5$ Hz for all samples and found to be almost frequency independent. At the relatively low temperature ranger (<$70^{\circ}C$), the dielectric constant was almost temperature independent and above that it increased with increasing temperature: the rate of increase being different at different frequencies. This behavior could be explained on the basis of the presence of molecular dipoles. The dielectric constant was found to depend on the composition as well as the crystalline phases formed in the glass matrix.

BB-계열에서 $Bi_2O_3$ 함량이 증가할수록 비저항의 peak는 낮은 온도로 이동하였다. 비저항에 대한 완화현상을 설명하기 위한 등가회로는 G-C의 병열회로이고, 전기전도과정은 체적전도이며, 완화의 형태는 non-Debye 형이었다. 그리고 BB-계열의 전기전도 현상은 일반적으로 s가 거의 일정한 (s=0.8) QMT 모델에 잘 맞는 것으로 판명되었다.

Keywords